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Journal

Kansas Agricultural Experiment Station Research Reports

Dairy Science

1985

Keyword

Articles 1 - 16 of 16

Full-Text Articles in Life Sciences

Early Postpartum Hormonal Therapy Improves Fertility Of Dairy Cows (1985), Jeffrey S. Stevenson, M. Benmrad Jan 1985

Early Postpartum Hormonal Therapy Improves Fertility Of Dairy Cows (1985), Jeffrey S. Stevenson, M. Benmrad

Kansas Agricultural Experiment Station Research Reports

A study of 234 Holstein cows was conducted to determine if hormonal treatments of gonadotropin-releasing hormone (GnRH or Cystorelin®) and(or) prostaglandin F2α (PGF or Lutalyse®) given early after calving would improve subsequent fertility of dairy cows. Treatment of cows having abnormal conditions associated with calving (puerperal problems) reduced interval from calving to conception by 43 to 48 days when GnRH was given once between days 10 and 14 postpartum or when PGF was administered once between 20 and 24 days after calving compared with cows given only saline (controls). The reduction in days open was 27 to 29 days overall …

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The Impact Of Culling On Production And Profit (1985), Edward P. Call Jan 1985

The Impact Of Culling On Production And Profit (1985), Edward P. Call

Kansas Agricultural Experiment Station Research Reports

Profit or loss in the dairy enterprise is dependent upon yearly production per cow and degree of capitalization. Higher producing cows convert feed into milk more efficiently. Cows of similar body size have similar maintenance requirements, regardless of level of yearly production. The successful dairy enterprise must establish yearly production goals needed to satisfy cash flow requirements and then implement management procedures to obtain maximal yearly milk per cow on the number of cows required to meet the herd's goal.; Dairy Day, 1985, Kansas State University, Manhattan, KS, 1985;

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Effect Of Moisture Level And Bale Size On Alfalfa Hay Quality (1985), A. Laytimi, C. Grimes, K.K. Bolsen Jan 1985

Effect Of Moisture Level And Bale Size On Alfalfa Hay Quality (1985), A. Laytimi, C. Grimes, K.K. Bolsen

Kansas Agricultural Experiment Station Research Reports

Third cutting alfalfa was baled in large I-ton rectangular bales and in small conventional bales at three moisture levels, low (10%), medium (16%), and high (22%). During 120 days of storage under a roof, the high-moisture, large bales heated the most, reaching 128 ÌŠ F by 2 days post baling in a first peak and 133 ÌŠF in a second peak by the 11 th day. Moderate heating occurred in the high-moisture, small bales (l08° F) and medium-moisture, large bales(103 ÌŠF). Only the high-moisture, small and large bales had significant loss of dry matter during storage. Also, heating decreased the …

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Rumensin Helps To Reduce The Incidence And Severity Of Legume Bloat In Cattle (1985), Tiruvoor G. Nagaraja, M.P. Katz, L.R. Fina Jan 1985

Rumensin Helps To Reduce The Incidence And Severity Of Legume Bloat In Cattle (1985), Tiruvoor G. Nagaraja, M.P. Katz, L.R. Fina

Kansas Agricultural Experiment Station Research Reports

Monensin at 300 mg and 450 mg per 1000 lbs body weight reduced the severity of alfalfa pasture bloat by 41.2 and 73.1 %, respectively. Lasalocid at the same levels reduced the bloat score by 25.5 and 12.4%. The difference between the two antibiotics appears to be in their ability to inhibit rumen protozoa. Monensin reduced protozoal population in the rumen, whereas lasalocid had no effect. A smaller protozoal population decreases compounds that contribute to frothiness and also increases substances such as plant chloroplasts, which have antifrothing properties.; Dairy Day, 1985, Kansas State University, Manhattan, KS, 1985;

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Influence Of Temperature And Humidity On The Reproductive Efficiency Of Dairy Cattle (1985), John E. Shirley, G.G. Lagombra Jan 1985

Influence Of Temperature And Humidity On The Reproductive Efficiency Of Dairy Cattle (1985), John E. Shirley, G.G. Lagombra

Kansas Agricultural Experiment Station Research Reports

The reproductive performance of 179 Holstein cows during the period from December 1978 through March 1984 was evaluated with respect to environmental temperature and humidity at the time of insemination. This study was conducted at the Western Kentucky University Farm, Bowling Green, Kentucky. Average monthly temperatures are similar to eastern Kansas, but average humidity is approximately 10 per cent higher. Average seasonal temperature and humidity values during the study period were 37.5°F, 81.2%; 60.2°F, 84.4%; 74.9°F, 89.4%; and 53.6°F, 85.3% for winter, spring, summer and fall, respectively. Conception rates observed were 54%, 46%, 15%, and 39% for winter, spring, summer, …

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Potential Of Interplanted Soybean And Grain Sorghum As A Forage For Dairy Cattle (1985), John E. Shirley, J. Evans Jan 1985

Potential Of Interplanted Soybean And Grain Sorghum As A Forage For Dairy Cattle (1985), John E. Shirley, J. Evans

Kansas Agricultural Experiment Station Research Reports

Interplanted soybean (l00 to 120 lbs/acre) and grain sorghum (15 to 20 lbs/acre) were harvested at 64,88,102, 123, and 130 days postplanting to determine the ratio and chemical composition of vegetative and seed parts for each plant at advancing stages of maturity. Initial vegetative dry matter yield was 6,300 lbs/acre and increased to 15,000 lbs/acre with 63% vegetative at 123 days postplanting. Vegetative portions (stems, leaves, stalks) of the soybean and grain sorghum plants constituted 100% of the dry matter at day 64, then decreased to 52% at day 130, whereas the contribution of the soy pod (plus bean) and …

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Relationship Of Herd Average Somatic Cell Count And Spontaneous Recovery From Subclinical Mastitis (1985), James R. Dunham Jan 1985

Relationship Of Herd Average Somatic Cell Count And Spontaneous Recovery From Subclinical Mastitis (1985), James R. Dunham

Kansas Agricultural Experiment Station Research Reports

The rate of spontaneous recovery from subclinical mastitis was evaluated in 56 Kansas. DHI herds participating in the Somatic Cell Count (SCC) program. Herds were classified as low (>300,000) or high (>600,000) based on herd sec average. Comparisons between low and high SCC-herds were made for each cow's ability to recover from a subclinical case of mastitis (>600,000 SCC). Low-SCC herds had a rate of spontaneous recovery that was more than three times greater than that of high-SCC herds. Average SCC of cows with subclinical mastitis was similar in low and high herds J as well as …

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Reproductive Characteristics Of Kansas Holstein Herds Grouped By Rolling Herd Average (1985), Edward P. Call, Jeffrey S. Stevenson Jan 1985

Reproductive Characteristics Of Kansas Holstein Herds Grouped By Rolling Herd Average (1985), Edward P. Call, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

An analysis of 635 Kansas Holstein herds with 41,426 cows indicated that the negative genetic antagonism between production and reproduction can be overcome with good management practices. As rolling herd average increased, only services per conception increased by 0.2 units. All other reproductive traits favored higher yearly production. Days to first service and cows not yet bred are the main factors responsible for less than ideal reproductive performance in Kansas Holstein herds.; Dairy Day, 1985, Kansas State University, Manhattan, KS, 1985;

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Comparison Of Am-Pm And Dhi Records (1985), James R. Dunham Jan 1985

Comparison Of Am-Pm And Dhi Records (1985), James R. Dunham

Kansas Agricultural Experiment Station Research Reports

A comparison was made of the AM-PM production testing program with the traditional DHI program during 13 test periods of 1984 in the KSU Dairy Teaching and Research Center herd. Although there were slight variations in daily milk weights and percentages of fat and protein in milk, rolling herd averages were nearly identical. Individual 305-2X-M.E. milk and fat records also were compared for 107 cows using both testing programs. Differences between testing programs were minimal) as most records varied by less than 1%. Therefore, it was concluded that the AM-PM program is a very accurate production test.; Dairy Day, 1985, …

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Effect Of Calf-Starter Protein Solubility On Calf Performance (1985), J.L. Morrill, P.G. Reddy, Keith C. Behnke, James J. Higgins Jan 1985

Effect Of Calf-Starter Protein Solubility On Calf Performance (1985), J.L. Morrill, P.G. Reddy, Keith C. Behnke, James J. Higgins

Kansas Agricultural Experiment Station Research Reports

Three starters containing differently processed protein supplements were fed to Holstein heifer calves, using an early weaning program. One starter contained soybean meal. The other starters contained soybean grits processed through an extrusion cooker to reduce the protein solubility to an intermediate (PDI>50%) or low (PDI<15 %) level. Calf performance was similar on all three starters.; Dairy Day, 1985, Kansas State University, Manhattan, KS, 1985;

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Effect Of Serum From Vitamin E-Supplemented Calves On Infectious Bovine Rhinotracheitis Virus Replication (1985), P.G. Reddy, J.L. Morrill, H.C. Minocha, R.A. Frey Jan 1985

Effect Of Serum From Vitamin E-Supplemented Calves On Infectious Bovine Rhinotracheitis Virus Replication (1985), P.G. Reddy, J.L. Morrill, H.C. Minocha, R.A. Frey

Kansas Agricultural Experiment Station Research Reports

Blood serum from Holstein calves supplemented with vitamin E at levels of 2800 mg orally or 1400 mg by injection at weekly intervals inhibited replication of Infectious Bovine Rhinotracheitis Virus in tissue cultures. Supplementing typical calf diets with vitamin E may increase protection against pathogens, at a time when they are more vulnerable to problems such as respiratory diseases.; Dairy Day, 1985, Kansas State University, Manhattan, KS, 1985;

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Effect Of Sodium Bicarbonate And Sodium Bentonite On Digestion And Rumen Fermentation Characteristics Of Forage Sorghum Silage-Based Diets Fed To Growing Steers (1985), K.A. Jacques, D.E. Axe, T.R. Harris, D.L. Harmon Jan 1985

Effect Of Sodium Bicarbonate And Sodium Bentonite On Digestion And Rumen Fermentation Characteristics Of Forage Sorghum Silage-Based Diets Fed To Growing Steers (1985), K.A. Jacques, D.E. Axe, T.R. Harris, D.L. Harmon

Kansas Agricultural Experiment Station Research Reports

One percent sodium bicarbonate (NaHCo3) increased intake of a 50% silage - 50% grain diet, but had no effect on intake of a full-feed sorghum silage diet. The addition of concentrate (rolled milo) slightly lowered rumen pH and decreased acid detergent fiber (ADF) and starch digestion. NaHC03 had no effect on digestibility, but 2% bentonite lowered digestibility of NDF and ADF. Neither compound affected rumen fermentation characteristics.; Dairy Day, 1985, Kansas State University, Manhattan, KS, 1985;

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Controlling Calving Intervals With Prostaglandin F2Α And Fixed-Time Inseminations (1985), Jeffrey S. Stevenson, M.C. Lucy, Edward P. Call Jan 1985

Controlling Calving Intervals With Prostaglandin F2Α And Fixed-Time Inseminations (1985), Jeffrey S. Stevenson, M.C. Lucy, Edward P. Call

Kansas Agricultural Experiment Station Research Reports

Prolonged or delayed interval to first breeding is a major cause of long calving intervals. Our objective was to test two methods of artificial insemination by appointment after controlling the onset of estrus for all first breedings after calving. prostaglandin F2α(PGF) was used to time the onset of estrus for cows in two experimental groups. Control cows (inseminated at first heat after 42 days postpartum) had longer intervals to first breeding than the two experimental groups given PCF at 40 to 46 and 51 to 57 days postpartum. Conception rates were lower in the treated cows than in control cows. …

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Genetic Selection And Breeding Practices Of Kansas Holstein Herds In Relation To Yearly Level Of Production (1985), Edward P. Call Jan 1985

Genetic Selection And Breeding Practices Of Kansas Holstein Herds In Relation To Yearly Level Of Production (1985), Edward P. Call

Kansas Agricultural Experiment Station Research Reports

An analysis of 41,426 cows in 635 Kansas Holstein herds indicated that considerable improvement can be made in genetic gain by more stringent sire selection and greater use of proved bulls. The generation interval in dairy cattle is about 5 yr so a dairy producer has only a limited number of decisions by which to make genetic improvement. Maximum genetic gain is possible by breeding 80 percent of the herd to bulls in the 80+ percentile. The remainder of the herd should be bred to several young sires in a progeny test program to aid in selecting the meritorious sires …

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Potential Of Interseeded Soybean And Grain Sorghum As A Forage For Dairy Cattle (1985), John E. Shirley, J. Koger Jan 1985

Potential Of Interseeded Soybean And Grain Sorghum As A Forage For Dairy Cattle (1985), John E. Shirley, J. Koger

Kansas Agricultural Experiment Station Research Reports

Soybeans interseeded with grain sorghum (soy-sorghum) was compared to corn silage as a silage crop for ruminant animals over a 3-year period. Results indicate that DM yields are comparable if soy-sorghum is seeded early (June 6) but less than corn silage when seeded late (June 28). Liquid manure may be substituted for commercial fertilizer without a significant decrease in soy-sorghum DM yield per acre.; Dairy Day, 1985, Kansas State University, Manhattan, KS, 1985;

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Silage Additive Update: 1985 (1985), K.K. Bolsen, J.D. Hoover Jan 1985

Silage Additive Update: 1985 (1985), K.K. Bolsen, J.D. Hoover

Kansas Agricultural Experiment Station Research Reports

Silage additives are receiving fairly widespread acceptance in the U.S. as management tools that are important for silage-making. Many products, which are added to the crop at the time of harvest or ensiling, are available commercially in Kansas. Some manufacturers/distributors make no claims for their products, primarily because management is such an important factor in making a good quality silage. Others claim their product will improve silage quality. When a claim is made, it is wise to check for evidence that the product has a favorable effect on the silage crop in question. Farm-scale silo trials at Kansas State University …

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