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Kansas Agricultural Experiment Station Research Reports

2007

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Southwest Research-Extension Center Field Day 2007 Jan 2007

Southwest Research-Extension Center Field Day 2007

Kansas Agricultural Experiment Station Research Reports

Each Field Day report consists of individual research reports on topics specific to the region, including cultural methods for most of the major crops grown in Kansas, mitigating the effects of weeds, insects, and disease associated with those crops, and irrigation. Research is conducted and reports written by staff of the K-State Research and Extension Southwest Research Extension Center.

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Kansas Fertilizer Research 2006, Dale F. Leikam Jan 2007

Kansas Fertilizer Research 2006, Dale F. Leikam

Kansas Agricultural Experiment Station Research Reports

No abstract provided.

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Field Research 2006, Kansas State University. Department Of Agronomy Jan 2007

Field Research 2006, Kansas State University. Department Of Agronomy

Kansas Agricultural Experiment Station Research Reports

No abstract provided.

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Ammonia Ion Selective Electrode And Indophenol Methods Can Be Used Successfully To Evaluate Meat Contaminated By Ammonia, F. Hijaz, J. Scott Smith, Curtis L. Kastner Jan 2007

Ammonia Ion Selective Electrode And Indophenol Methods Can Be Used Successfully To Evaluate Meat Contaminated By Ammonia, F. Hijaz, J. Scott Smith, Curtis L. Kastner

Kansas Agricultural Experiment Station Research Reports

Anhydrous ammonia is used as a refrigerant in large warehouses for cooling meats, fruits, vegetables, milk, and other products. Ammonia offers several advantages over other refrigerants; it does not harm the ozone layer and is a very efficient heat transfer agent. However, cold storage facilities sometimes have ammonia leaks. When this happens, products are held for an indeterminate period or are condemned because there is no official method to evaluate the degree of product contamination. In one case, a warehouse owner discarded a product because he could not prove that it was safe. His insurance company would not compensate him …

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Despite Nais Concerns Electronic Identification Use By Cow-Calf Producers Is Increasing, S.J. Breiner, S.A. Grau, B.B. Barnhardt, A.M. Bryant, Kris Boone, Dale A. Blasi, Ted C. Schroeder, Ryan M. Breiner Jan 2007

Despite Nais Concerns Electronic Identification Use By Cow-Calf Producers Is Increasing, S.J. Breiner, S.A. Grau, B.B. Barnhardt, A.M. Bryant, Kris Boone, Dale A. Blasi, Ted C. Schroeder, Ryan M. Breiner

Kansas Agricultural Experiment Station Research Reports

The proposed U.S. National Animal Identification System has generated concerns among producers relative to implementation of the system. Many of these concerns stem from the USDA's Bovine Identification Working Group's recommendations to use electronic Identification Plan Bovine Working Group has recommended radio frequency identification as the technology to individually identify cattle. Understanding and implementing an electronic identification system for cow-calf producers is believed to be one of the greatest challenges of implementing the National Animal Identification System.

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Mature Open Cows Are Rarely Persistently Infected With Bovine Viral Diarrhea Virus, Bradley J. White, Robert L. Larson, Daniel U. Thomson Jan 2007

Mature Open Cows Are Rarely Persistently Infected With Bovine Viral Diarrhea Virus, Bradley J. White, Robert L. Larson, Daniel U. Thomson

Kansas Agricultural Experiment Station Research Reports

Bovine viral diarrhea virus (BVDv) is an immunosuppressive virus affecting cattle in a multitude of ways. The varied presentation makes this disease difficult to identify in cow herds and the signs of a BVD infection may be very subtle. The syndrome causes economic problems by reducing herd fertility and increasing disease rates. The persistently infected (PI) animal is a unique reservoir for BVDv. These cattle are the result of in utero exposure to the noncytopathic biotype of BVDv prior to the development of a competent fetal immune system at about 125 days of gestation. Persistently infected animals are the primary …

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Validation Of Commercial Dna Tests For Beef Quality Traits, A.L. Van Eenennaam, J. Li, R.M. Thallman, R.L. Quaas, C. Gill, D.E. Franke, M.G. Thomas, Michael E. Dikeman Jan 2007

Validation Of Commercial Dna Tests For Beef Quality Traits, A.L. Van Eenennaam, J. Li, R.M. Thallman, R.L. Quaas, C. Gill, D.E. Franke, M.G. Thomas, Michael E. Dikeman

Kansas Agricultural Experiment Station Research Reports

Gene mapping and discovery programs have resulted in the detection of numerous DNA "˜markers' for various beef cattle production traits. Prior to commercializing genetic markers, it is important to validate their purported effects on the traits of interest in different breeds and environments, and assess them for correlated responses in associated traits. One of the biggest challenges in achieving this objective is the availability of cattle populations with sufficient phenotypic data to assess the association between various traits and newly discovered genetic markers. Results from such validation studies to date have not been widely published and genetic marker tests sometimes …

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Supplementation With Degradable Intake Protein Increases Low-Quality Forage Utilization And Microbial Use Of Recycled Urea, T.A. Wickersham, R.C. Cochran, E.E. Wickersham, D.P. Gnad, Evan C. Titgemeyer Jan 2007

Supplementation With Degradable Intake Protein Increases Low-Quality Forage Utilization And Microbial Use Of Recycled Urea, T.A. Wickersham, R.C. Cochran, E.E. Wickersham, D.P. Gnad, Evan C. Titgemeyer

Kansas Agricultural Experiment Station Research Reports

A common production practice throughout the United States is to supplement protein to cattle consuming low-quality forage (forage with a crude protein content of less than 7%) in order to improve animal performance (i.e., maintain body condition score and body weight) during the winter. Protein supplementation increases forage utilization (intake and digestion) and cow performance by supplying ruminal microbes with protein that is essential for microbial growth. Increased microbial activity in turn provides sources of both protein and energy to the cow. In addition to the protein that is fed and degraded in the rumen, ruminants have the ability to …

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Southwest Research-Extension Center: Another 50 Years Of Progress (1957-2007) Jan 2007

Southwest Research-Extension Center: Another 50 Years Of Progress (1957-2007)

Kansas Agricultural Experiment Station Research Reports

The Garden City Branch Experiment Station was established in 1907. The mission was to serve the people of western Kansas by developing new knowledge and technology for agriculture. The current review will focus mainly on the second 50 years of the station’s history.

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Southwest Research-Extension Center, Field Day 2007 Jan 2007

Southwest Research-Extension Center, Field Day 2007

Kansas Agricultural Experiment Station Research Reports

Report of agricultural research from Southwest Research-Extension Center of Kansas State University.

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Digestible Energy Content Of Corn And Triticale When Fed To Finishing Pigs (2007), C Feoli, C R. Monge, Terry L. Gugle, Joe D. Hancock Jan 2007

Digestible Energy Content Of Corn And Triticale When Fed To Finishing Pigs (2007), C Feoli, C R. Monge, Terry L. Gugle, Joe D. Hancock

Kansas Agricultural Experiment Station Research Reports

Digestible energy content of corn and triticale when fed to finishing pigs; Swine Day, 2007, Kansas State University, Manhattan, KS, 2007

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An Evaluation Of Dextrose, Lactose, And Whey Sources In Phase 2 Starter Diets For Weanling Pigs (2007), J R. Bergstrom, C N. Groesbeck, J M. Benz, Michael D. Tokach, Jim L. Nelssen, Joel M. Derouchey, Robert D. Goodband, Steven S. Dritz Jan 2007

An Evaluation Of Dextrose, Lactose, And Whey Sources In Phase 2 Starter Diets For Weanling Pigs (2007), J R. Bergstrom, C N. Groesbeck, J M. Benz, Michael D. Tokach, Jim L. Nelssen, Joel M. Derouchey, Robert D. Goodband, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Two experiments were conducted to evaluate the effects of various dextrose, lactose, and whey sources on weanling pig performance. In Exp. 1, a total of 228 pigs (initially 17.1 lb) were used in a 14-d experiment. There were six treatments consisting of a control (corn-soybean meal diet) or the control diet with 7.2% lactose, 7.2% dextrose anhydrous, 7.2% dextrose monohydrate, 10% feed-grade whey, or 10% food-grade whey. Pigs were blocked by weight and randomly allotted to treatment after being fed SEW and Transition diets for the first seven days post-weaning. Overall, ADG and d 14 weight were improved (P<0.05) for pigs fed lactose or food-grade whey when compared to pigs fed feed-grade whey. There were no other differences in ADG or d 14 weights among the treatments. Average daily feed intake was improved (P<0.05) for pigs fed lactose, dextrose monohydrate, or food-grade whey when compared to those fed feed-grade whey. Feed efficiency was improved (P<0.05) for pigs fed food-grade whey rather than dextrose monohydrate. For the economic analysis, pigs fed the control diet had the lowest (P<0.01) cost per pound of gain, followed by pigs fed dextrose monohydrate, dextrose anhydrous, feed-grade whey, lactose, and food-grade whey. Margin-over-feed cost was improved (P<0.05) for pigs fed the control diet rather than the diets containing lactose, dextrose anhydrous, or either whey source. In Exp. 2, a total of 352 pigs (initially 17.1 lb) were used in a 14-d experiment to evaluate seven commercial whey sources. There were eight treatments consisting of a corn-soybean meal-based control diet and seven diets containing 10% whey, each of a different whey source. Pigs were blocked by weight and randomly allotted to treatment after being fed SEW and Transition diets for the first five days post-weaning. Overall, ADG and d 14 weight were improved (P<0.05) for pigs fed whey sources A and E when compared to the control and sources B and D. Pigs fed whey sources C, F, and G had intermediate ADG. Average daily feed intake was greater (P<0.05) for pigs fed whey source E rather than the control or whey sources B, C, D, and G. Feed efficiency was improved (P<0.05) for pigs fed whey source A rather than the control. Pigs fed the remaining whey sources had intermediate F/G. For the economic analysis, pigs fed the control diet had the lowest cost per pound of gain (P<0.01). Margin-over-feed cost was improved (P<0.05) for pigs fed the control diet rather than the diets containing whey sources B, D, and G. Pigs fed whey source A had intermediate MOF that was also greater (P<0.05) than that of pigs fed whey sources B and D. In conclusion, differences in the growth performance of pigs fed various whey (or lactose) and dextrose sources exist. The quality, cost, and relative feeding value of lactose sources should be considered when formulating diets for nursery pigs. In some cases, especially with the current high price of dried whey, feeding a Phase 2 diet containing no added source of lactose may be a more economical option despite the slight reduction in growth performance.; Swine Day, 2007, Kansas State University, Manhattan, KS, 2007

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Ultrasound Sorting Increases Feedlot Profitability, A. Garmyn, Daniel W. Moser Jan 2007

Ultrasound Sorting Increases Feedlot Profitability, A. Garmyn, Daniel W. Moser

Kansas Agricultural Experiment Station Research Reports

Feedlot managers often market entire pens as mixed groups, resulting in lower-quality, over-finished, or heavyweight carcasses. As the cattle industry has moved towards valuebased marketing systems, finding a costeffective tool that predicts future carcass merit and sorts cattle into outcome groups, thus producing a more uniform product at harvest, is of great interest to feedyard managers. The objective of this research was to determine the profitability of sorting feedlot cattle at reimplant time by using ultrasound and computer technology to group cattle into uniform market groups.

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Dried Distiller’S Grains Improve The Performance Of Beef Cattle Intensively Grazing Early Summer Bluestem Pasture, M. Epp, B. Barnhardt, A. Bryant, Dale A. Blasi Jan 2007

Dried Distiller’S Grains Improve The Performance Of Beef Cattle Intensively Grazing Early Summer Bluestem Pasture, M. Epp, B. Barnhardt, A. Bryant, Dale A. Blasi

Kansas Agricultural Experiment Station Research Reports

Distiller's grains are byproducts of the production of ethanol from grains and are an excellent source of protein and energy for cattle. The most prevalent use of distiller's grains is in the finishing beef production sector. There is limited research available that has evaluated effectiveness of distiller's grains as a supplement for grazing beef cattle. Digestible protein content in grass begins to decrease in midsummer, resulting in lower average daily gains. The objective of this study was to measure the daily gain of yearling steers supplemented with different levels of dried distiller's grains while grazing doublestock Flint Hills pastures.

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Optimizing Use Of Distiller’S Grains With Solubles (Dgs) In Finishing Cattle Diets, E.R. Loe, M.E. Corrigan, M.J. Quinn, Brandon E. Depenbusch, James S. Drouillard Jan 2007

Optimizing Use Of Distiller’S Grains With Solubles (Dgs) In Finishing Cattle Diets, E.R. Loe, M.E. Corrigan, M.J. Quinn, Brandon E. Depenbusch, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Rapid expansion of the fuel ethanol industry has increased availability of distillery byproducts. Distiller's grains with solubles (DGS) are the predominant byproduct of fermenting grains to fuel ethanol. During this process, the majority of starch is removed from the grain, and residual components of the grain are concentrated into the distiller's byproduct. Distiller's grains with solubles contain the bran, which is high in fiber; the germ, which is high in fat; and the protein. Given the relatively high fiber content of DGS, it is conceivable that DGS could serve as a replacement for roughage in finishing diets. One of the …

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2007 Agricultural Research Southeast Agricultural Research Center, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service Jan 2007

2007 Agricultural Research Southeast Agricultural Research Center, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service

Kansas Agricultural Experiment Station Research Reports

No abstract provided.

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Effects Of Dried Distillers Grains With Solubles And Extruded Expelled Soybean Meal On Growth Performance And Carcass Characteristics Of Grow-Finish Pigs (2007), J M. Benz, Michael D. Tokach, Jim L. Nelssen, Joel M. Derouchey, Robert D. Goodband, Steven S. Dritz Jan 2007

Effects Of Dried Distillers Grains With Solubles And Extruded Expelled Soybean Meal On Growth Performance And Carcass Characteristics Of Grow-Finish Pigs (2007), J M. Benz, Michael D. Tokach, Jim L. Nelssen, Joel M. Derouchey, Robert D. Goodband, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 120 barrows (maternal line PIC 1050) with an initial BW of 105.7 lb were used in an 83-d trial to study the effects of dried distillers grains with solubles (DDGS) and extruded expelled soybean meal (EESM) on growth performance and fat quality. Pigs were blocked by weight and randomly allotted to one of six treatments with two pigs per pen and 10 pens per treatment. Diets were: a corn-soybean meal control diet with no added fat, corn-EESM diet with no added fat, corn-EESM diet with 15% DDGS, corn-soybean meal diet with 15% DDGS, and 1.55% choice white …

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Determination Of The Fourth-Limiting Amino Acid In Swine Diets Containing Nutridense® Corn (2007), A W. Duttlinger, J R. Bergstrom, J Snow, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Joel M. Derouchey, Steven S. Dritz Jan 2007

Determination Of The Fourth-Limiting Amino Acid In Swine Diets Containing Nutridense® Corn (2007), A W. Duttlinger, J R. Bergstrom, J Snow, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband, Joel M. Derouchey, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Two studies were conducted to determine the fourth-limiting amino acid in swine diets containing NutriDense® corn. Both experiments were conducted at a commercial swine research facility in southwest Minnesota. In Exp. 1, 1,259 pigs (initially 82.1 lb, PIC) were used in a 28-d study. Pigs were blocked by weight, and were randomly allotted to one of six dietary treatments. Pigs were fed NutriDense® corn-soybean meal-based diets. The treatments were 1) a positive control diet containing 0.15% L-lysine HCl and 0.015% added L-threonine; 2) a negative control diet with 0.45% L-lysine HCl, 0.085% added DL-methionine, and 0.15% added L-threonine; 3) treatment …

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Effects Of Pcv2 Vaccine On The Growth Performance Of Pigs And Mortality Rate In A Pcv2-Positive Commercial Swine Herd (2007), J Y. Jacela, R C. Sulabo, J R. Bergstrom, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2007

Effects Of Pcv2 Vaccine On The Growth Performance Of Pigs And Mortality Rate In A Pcv2-Positive Commercial Swine Herd (2007), J Y. Jacela, R C. Sulabo, J R. Bergstrom, Michael D. Tokach, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 1,470 pigs were used to study a commercial sow herd with a history of Porcine Circovirus Disease (PCVD). The objective was to evaluate the effect of two commercially available Porcine Circovirus Type 2 (PCV2) vaccines on growth and mortality rates. The first vaccine was administered one week after weaning (1-dose) while the second was administered at weaning and repeated three weeks later (2-dose). A third group of unvaccinated pigs served as a control group. Pigs were individually weighed at weaning (d 0), d 113, 143, and just prior to market. On d 113, pigs on the 2-dose …

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Supplementation Of Stocker Steers Grazing Native Flint Hills Pasture With A Protein And Mineral Supplement Increases Average Daily Gains, B.B. Barnhardt, M.P. Epp, A.M. Bryant, P.J. Guiroy, Dale A. Blasi Jan 2007

Supplementation Of Stocker Steers Grazing Native Flint Hills Pasture With A Protein And Mineral Supplement Increases Average Daily Gains, B.B. Barnhardt, M.P. Epp, A.M. Bryant, P.J. Guiroy, Dale A. Blasi

Kansas Agricultural Experiment Station Research Reports

Supplementation of range cattle with minerals is a common management practice that is used to maximize performance. Flint Hills grasses provide an adequate amount of protein for the diet through the first half of a doublestock grazing period, but declining protein content of native grasses during the latter parts of the grazing season typically cause decreases in forage digestibility and daily gains. The goal of this experiment was to measure differences in performance between steers that were supplemented with a) loose salt for the entire grazing period, b) a stocker mineral supplement for the entire grazing period, or c) a …

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Microbial Use Of Recycled Urea Is Dependent On The Level And Frequency Of Degradable Intake Protein Supplementation, T.A. Wickersham, R.C. Cochran, E.E. Wickersham, E.S. Moore, Evan C. Titgemeyer Jan 2007

Microbial Use Of Recycled Urea Is Dependent On The Level And Frequency Of Degradable Intake Protein Supplementation, T.A. Wickersham, R.C. Cochran, E.E. Wickersham, E.S. Moore, Evan C. Titgemeyer

Kansas Agricultural Experiment Station Research Reports

Protein supplementation increases utilization (intake and digestion) of low-quality forage and ultimately animal performance. Despite its effectiveness, protein supplementation is often expensive. One strategy to reduce the cost of supplementation is to supplement less frequently than daily, generally every other day or every third day. By reducing the frequency of supplementation, the cost of delivering the supplement is reduced. Reducing the frequency of supplementation is an effective strategy for reducing cost, and it only minimally impacts animal performance, with less frequent supplementation resulting in slightly greater losses of body condition score and body weight during the winter supplementation period. Urea …

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Efficacy Of Feed Grade Antibiotics In Finishing Diets Containing Distiller’ Grains With Solubles (Dgs), E.R. Loe, M.J. Quinn, Brandon E. Depenbusch, James S. Drouillard Jan 2007

Efficacy Of Feed Grade Antibiotics In Finishing Diets Containing Distiller’ Grains With Solubles (Dgs), E.R. Loe, M.J. Quinn, Brandon E. Depenbusch, James S. Drouillard

Kansas Agricultural Experiment Station Research Reports

Rumensin and Tylan, both marketed by Elanco Products Company, have proved to be valuable feed additives when fed to finishing feedlot cattle. Rumensin was approved in the mid-1970s to improve feed efficiency and average daily gain. Rumensin frequently is used to manage digestive disturbances associated with otherwise erratic intakes of high grain diets. Tylan is fed as a preventative for liver abscesses. Rumen disorders such as acidosis and rumenitis are predisposing factors for liver abscesses. Erratic intakes of high grain diets along with poor bunk management are important factors that predispose cattle to ruminal disorders. Abscessed livers can have deleterious …

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Energy Supply Affects Leucine Utilization By Growing Steers, G.F. Schroeder, E.S. Moore, Evan C. Titgemeyer Jan 2007

Energy Supply Affects Leucine Utilization By Growing Steers, G.F. Schroeder, E.S. Moore, Evan C. Titgemeyer

Kansas Agricultural Experiment Station Research Reports

In growing pigs, when protein supply is adequate, protein deposition increases with an increase in energy intake. However, when amino acid supply is limited, protein deposition does not respond to increases in energy intake. These relationships between energy, protein supply and protein deposition, which are observed in monogastric animals, have been described as protein- and energydependent phases of growth. These relationships indicate that energy supply does not affect the efficiency of amino acid utilization, allowing the assumption of a constant efficiency across a broad range of energy intake. Although this type of relationship is assumed for cattle by most of …

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Limit-Feeding A High-Concentrate Diet May Alter Nutrient Absorption, J.O. Wallace, W.F. Miller, B.J. Johnson, Christopher D. Reinhardt Jan 2007

Limit-Feeding A High-Concentrate Diet May Alter Nutrient Absorption, J.O. Wallace, W.F. Miller, B.J. Johnson, Christopher D. Reinhardt

Kansas Agricultural Experiment Station Research Reports

Feeding newly arrived cattle is commonly characterized by a few days of feeding longstemmed hay followed by a series of step-up diets, wherein concentrate levels are increased to promote ruminal adaptation to a highconcentrate finishing diet. This is done to give the rumen microbes time to adjust to larger amounts of readily fermentable starches in cereal grains. Rumen epithelial adaptation may be achievable by limit-feeding a finishing diet, with gradual increases in feed intake, until the cattle are on full feed. If this can be achieved without causing ruminal disorders and days off feed, then the cost of feeding cattle …

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Wet Distiller’S Grains With Solubles In Beef Finishing Diets Comprised Of Steam-Flaked Or Dry-Rolled Corn, M.L. May, M.J. Quinn, James S. Drouillard, Charles E. Walker Jan 2007

Wet Distiller’S Grains With Solubles In Beef Finishing Diets Comprised Of Steam-Flaked Or Dry-Rolled Corn, M.L. May, M.J. Quinn, James S. Drouillard, Charles E. Walker

Kansas Agricultural Experiment Station Research Reports

The purpose of this experiment was to determine optimal levels of distiller's grains in finished diets with steam-flaked corn or dry rolled corn. Distiller's grains have been used extensively in regions of the country in which dry-rolled and high-moisture grains are prevalent. Production of fuel ethanol is now expanding into the High Plains, where feedlots more commonly use steam flaking. The cost to produce flaked corn is higher than the cost to produce dry rolled corn, and with rising energy costs (especially natural gas), this spread is becoming more dramatic. Comparing the use of wet distiller's grains fed in conjunction …

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Nutritional Strategies For A Healthy Transition To Lactation: An Update (2007), Barry J. Bradford Jan 2007

Nutritional Strategies For A Healthy Transition To Lactation: An Update (2007), Barry J. Bradford

Kansas Agricultural Experiment Station Research Reports

Reducing cull rates and improving fertility in early lactation has a dramatic effect on the profitability of many dairies. Continuing research on transition cow nutrition has led to the development of an array of nutritional strategies to prevent disorders during the transition period. It is important, however, to realize that some of these strategies have similar modes of action, and as such, their effects are not likely to be additive. Producers should work with their nutritionist and veterinarian to identify the most prevalent transition problems in the herd and review options for preventing those disorders.; Dairy Day, 2007, Kansas State …

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Application Of The Progesterone (Cidr) Insert In Artificial Insemination Programs Of Dairy Cattle (2007), Jeffrey S. Stevenson Jan 2007

Application Of The Progesterone (Cidr) Insert In Artificial Insemination Programs Of Dairy Cattle (2007), Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Use of progesterone inserts (controlled interval drug release, CIDR) offers another option for synchronizing estrus and ovulation in replacement heifers and lactating dairy cows. Results indicate that heifers may be inseminated after detected estrus, at a fixed time (timed AI), or a combination of both. Conception rates exceed 50% in both scenarios. Practical applications of the CIDR in lactating cows have been used to resynchronize the return estrus of previously inseminated cows and as part of first-service AI-breeding protocols. Use for resynchronization has no drawbacks in previously inseminated cows, but may increase embryo survival during the first 30- to 60-days …

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Impact Of Separator Efficiency And Removed Solids Moisture Content On Make-Up Water Requirements For Sand Recovery (2007), Joseph P. Harner, John F. Smith, Michael J. Brouk Jan 2007

Impact Of Separator Efficiency And Removed Solids Moisture Content On Make-Up Water Requirements For Sand Recovery (2007), Joseph P. Harner, John F. Smith, Michael J. Brouk

Kansas Agricultural Experiment Station Research Reports

Separator efficiency and moisture content of separated solids influence the make-up water requirements on a dairy seeking to utilize recycled water for sand reclamation. Additional water requirements range from 0 to 79 gallons/cow per day depending on the efficiency of the solid to liquid separation process. Make-up water includes any water stored in a containment structure, excluding urine. Final moisture content of the separated solids had marginal impact on the additional water requirements.; Dairy Day, 2007, Kansas State University, Manhattan, KS, 2007; Dairy Research, 2007 is known as Dairy Day, 2007

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Ability Of Low Profile Cross-Ventilated Freestall Barns To Improve Environmental Conditions For Dairy Cattle (2007), John F. Smith, Joseph P. Harner, Michael J. Brouk Jan 2007

Ability Of Low Profile Cross-Ventilated Freestall Barns To Improve Environmental Conditions For Dairy Cattle (2007), John F. Smith, Joseph P. Harner, Michael J. Brouk

Kansas Agricultural Experiment Station Research Reports

Recently, there has been interest in constructing mechanical ventilation with evaporative pads to improve the environmental conditions for cows during periods of heat stress. Low profile cross-ventilated freestalls with evaporative pads (LPCV) have become a popular system. The purpose of this study was to evaluate how well these LPCV systems improve the temperature-humidity index (THI) under different ambient conditions. As ambient humidity increases, ability of the LPCV to reduce THI is decreased. Producers wishing to construct LPCV barns should carefully evaluate the climate in which they want to construct LPCV structures.; Dairy Day, 2007, Kansas State University, Manhattan, KS, 2007; …

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Validation Of Flank-To-Flank Allometric Equations In Predicting Weight Of Lactating Sows And Lactation Weight Change (2007), R C. Sulabo, Michael D. Tokach, E J. Wiedmann, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz Jan 2007

Validation Of Flank-To-Flank Allometric Equations In Predicting Weight Of Lactating Sows And Lactation Weight Change (2007), R C. Sulabo, Michael D. Tokach, E J. Wiedmann, Joel M. Derouchey, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

The objectives of this study were to validate the use of flank-to-flank measurement in predicting weight of lactating sows and to determine the accuracy of the developed models in estimating lactation weight change. A total of 70 lactating sows (PIC Line 1050) were used in this study. Flank-to-flank measurement and body weight were measured on each individual sow after farrowing and at weaning. Flank-to-flank measurement and weight of lactating sows was positively correlated (R2 = 0.61; P<.0001) with the following equation: BW0.33, kg = 0.0371 x Flank-to-flank (cm) + 2.161. Weights of sows post-farrowing and at weaning were lower (P<0.03) when predicted with the previous allometric model developed from growing pigs and sows than their actual weights or weights predicted using the lactating sow model. Likewise, absolute residuals for post-farrowing and weaning weights using a previous allometric model developed from growing pigs and gestating sows were greater (P<0.02) than those of the lactating sow model. There were no differences (P<0.89) between the predicted weights using the lactating sow model and their actual weights. There also were no differences between the actual average weight loss (P<0.14) and the predicted loss using the lactating sow model. Using the model previously developed with growing pigs and gestating sows resulted in 15.5 lb (P<0.007) greater than the actual average weight loss. In conclusion, flank-to-flank measurement can be used as a predictor of weight of lactating sows, with the relationship having less accuracy than those used for growing-finishing pigs, gestating sows, and boars. The pig allometric equation cannot be used to estimate weights of lactating sows and lactation weight change. The developed lactating sow model was more appropriate in estimating weights and weight loss at the herd level, but needs to be validated on other sows before use can be recommended.; Swine Day, 2007, Kansas State University, Manhattan, KS, 2007

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