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Articles 6571 - 6600 of 12513
Full-Text Articles in Entire DC Network
Comparison Of Quality And Production By Different Silage Making Methods Of Barley Cultivated In The Paddy After Rice Harvest, J. S. Shin, E. B. Yoon, M. S. Park
Comparison Of Quality And Production By Different Silage Making Methods Of Barley Cultivated In The Paddy After Rice Harvest, J. S. Shin, E. B. Yoon, M. S. Park
IGC Proceedings (1977-2023)
The objective of this study was to compare whether the productivity and production cost of whole crop barley was affected by silage making methods at early bloom stage in the rice field. In nutritive value, quality and palatability of silage, baled silage making method was a little higher than that of crushed silage making. On the other hand, in terms of dry matter and total digestible nutrient (TDN) production cost, proper work capacity at about 15 ha or more was desirable when making baled silage. In this case, the estimated dry matter production cost and TDN cost per ha was …
Yield, Feeding Value And Ensiling Characteristics Of Clone-13 (Pennisetum Purpureum), Sujatha Premaratne, G. G. C. Premalal, S. M. S. Setunga, J. M. S. Jayawardana
Yield, Feeding Value And Ensiling Characteristics Of Clone-13 (Pennisetum Purpureum), Sujatha Premaratne, G. G. C. Premalal, S. M. S. Setunga, J. M. S. Jayawardana
IGC Proceedings (1977-2023)
A study was carried out to find out the effect of frequency of defoliation on yield and feeding value of clone-13 (Pennisetum purpureum) in Sri Lanka. Three frequency of harvesting, namely 45, 60 and 75 days were used and, fresh yield per plot was measured. Sub samples were taken for dry matter determination and proximate analysis. According to results, frequency of harvesting of 60 days can be recommended for clone-13 under no fertilizer regime. In addition, effect of growth stage on ensiling characteristics of clone-13 was also studied. Clone-13 was harvested at 45, 60, 75 or 90 days …
Aerobic Stability Of Grass Silage Mixed With A Range Of Concentrate Feedstuffs At Feed-Out, P. O’Kiely, M. Clancy, E. M. Doyle
Aerobic Stability Of Grass Silage Mixed With A Range Of Concentrate Feedstuffs At Feed-Out, P. O’Kiely, M. Clancy, E. M. Doyle
IGC Proceedings (1977-2023)
Mixing supplementary concentrates with silage at feed-out could shorten aerobic stability or increase the rate or extent of aerobic deterioration of silage. This experiment quantified such possible effects by twelve contrasting feedstuffs. Four samples (each 6 kg) of unwilted, precision-chop, well preserved grass silage (216 g dry matter (DM) kg-1 and pH 4.0) were incubated at 20oC for 6 days in polystyrene containers alone or with the addition of 400 g (solid ingredients were milled) of wheat grain, barley grain, maize grain, molasses beet pulp, citrus pulp, molasses, soybean meal, maize gluten, sunflower meal, rapeseed meal, dry …
Survival Of Escherichia Coli 0157:H7 Added To Grass At Ensiling And Its Influence On Silage Fermentation, P. O’Kiely, C. Byrne, D. Bolton
Survival Of Escherichia Coli 0157:H7 Added To Grass At Ensiling And Its Influence On Silage Fermentation, P. O’Kiely, C. Byrne, D. Bolton
IGC Proceedings (1977-2023)
Escherichia coli can cause health problems in humans and livestock. It is frequently found in faeces and soil, both of which can contaminate grass harvested for silage-making. To determine the survival of E. coli 0157:H7 during ensilage, and its influence on ensilage, unwilted precision-chop grass was ensiled in laboratory silos with the following additive treatments: (a) no additive, (b) E. coli 0157:H7 (Ec - non-infectious strain, at log10 4.5 colony forming units (cfu) g-1), formic acid (FA), and (d) Ec + FA. Silos were stored at 15oC. Three silos per treatment were opened on days …
Serapan Nitrogen Dan Fosfor Serta Hasil Jagung Yang Dipengaruhi Oleh Aplikasi Pupuk Hayati Dengan Berbagai Teknik Dan Dosis Pada Tanah Inceptisols, Betty Natalie Fitriatin, Muhammad Iqbal Maulana Yusuf, Anne Nurbaity, Nadia Nuraniya Kamaluddin, Meddy Rachmady, Emma Trinurani Sofyan
Serapan Nitrogen Dan Fosfor Serta Hasil Jagung Yang Dipengaruhi Oleh Aplikasi Pupuk Hayati Dengan Berbagai Teknik Dan Dosis Pada Tanah Inceptisols, Betty Natalie Fitriatin, Muhammad Iqbal Maulana Yusuf, Anne Nurbaity, Nadia Nuraniya Kamaluddin, Meddy Rachmady, Emma Trinurani Sofyan
Jurnal Kultivasi
Upaya meningkatkan unsur hara nitrogen (N) dan fosfor (P) tanah secara berkelanjutan adalah dengan memanfaatkan agen hayati bakteri penambat nitrogen dan bakteri pelarut fosfat. Percobaan pot dilakukan dengan tujuan untuk menentukan teknik aplikasi pupuk hayati dalam meningkatkan kandungan dan serapan hara N dan P serta hasil tanaman jagung pada Inceptisols Jatinangor. Percobaan dilaksanakan di Lahan Percobaan milik Laboratorium Kesuburan Tanah dan Nutrisi Tanaman, Fakultas Pertanian Universitas Padjadjaran. Pupuk hayati yang digunakan merupakan konsorsium bakteri penambat N (Azotobacter chroococcum dan Azospirillum sp.) dan bakteri pelarut P (Pseudomonas malei dan Bacillus subtillis). Percobaan menggunakan Rancangan Acak Kelompok (RAK) dengan sembilan perlakuan dan …
Pertumbuhan Dan Hasil Dua Kultivar Bayam Pada Sistem Budidaya Hidroponik Untuk Lahan Sempit, Syariful Mubarok, Asyifa Mardatillah, Anne Nuraini
Pertumbuhan Dan Hasil Dua Kultivar Bayam Pada Sistem Budidaya Hidroponik Untuk Lahan Sempit, Syariful Mubarok, Asyifa Mardatillah, Anne Nuraini
Jurnal Kultivasi
Hidroponik merupakan salah satu teknik sistem budidaya yang biasa digunakan di lahan sempit seperti di perkotaan. Tujuan dari penelitian ini adalah untuk menentukan sistem budidaya bayam yang paling baik untuk diterapkan pada sistem urban farming pada lahan sempit, misalnya di kawasan pemukiman padat penduduk di bagian timur Jakarta. Rancangan Acak Kelompok Lengkap yang digunakan dalam penelitian ini terdiri dari dua kultivar bayam dan tiga sistem budidaya yaitu budidaya konvensional, sistem hidroponik Wick dan NFT. Hasil penelitian menunjukkan bahwa sistem NFT menghasilkan pertumbuhan dan hasil terbaik yang ditunjukkan oleh jumlah daun, diameter batang, luas daun, panjang akar, volume akar dan berat …
Effects Of Dry Matter Content And Microbial Additive On Tifton 85 (Cynodon Dactylon Ssp.) Wilted Silage Fermentation Parameters, Luiz Gustavo Nussio, F. G. Castro, J. M. Simas, C. M. Haddad, P. Toledo, A. L. Merchan
Effects Of Dry Matter Content And Microbial Additive On Tifton 85 (Cynodon Dactylon Ssp.) Wilted Silage Fermentation Parameters, Luiz Gustavo Nussio, F. G. Castro, J. M. Simas, C. M. Haddad, P. Toledo, A. L. Merchan
IGC Proceedings (1977-2023)
The objective of this study was to evaluate the wilting and the addition of a bacterial-enzymatic additive effects on the fermentation parameters of Tifton 85 (Cynodon dactylon spp.) silage. Forage was stored as 326 kg bales wrapped with a plastic film. Treatments consisted of 5 forage dry matter levels (20-30%, 30-40%, 40-50%, 50 -60% e 60 a 70%) without additive and 3 dry matter levels (20-30%, 40-50%, e 60-70%) with additive. Buffered propionic acid solution was sprayed onto 60-70% dry matter bales, prior to wrapping, determining an additional treatment. Core samples were taken at 0, 6, 12 hours …
Dry Matter Losses In Tanzânia Grass (Panicum Maximum, Jacq, Cv. Tanzânia) Silage, M. A. A. Balsalobre, Luiz Gustavo Nussio, P. M. Santos, R. F. Crestana, R. N. S. Aguiar, M. Corsi
Dry Matter Losses In Tanzânia Grass (Panicum Maximum, Jacq, Cv. Tanzânia) Silage, M. A. A. Balsalobre, Luiz Gustavo Nussio, P. M. Santos, R. F. Crestana, R. N. S. Aguiar, M. Corsi
IGC Proceedings (1977-2023)
A spring cut of Tanzânia grass (Panicum maximum, Schum, cv. Tanzânia) was harvested (20% DM), in a 60-day regrowth sward. Laboratory silos (20 L) were filled with chopped forage. Nine treatments, in a 3 x 3 factorial arrangement with four replication each. Treatments consisted on the addition of 3 levels of dehydrated and pellet citrus pulp (CP) (0, 5 and 10%- fresh basis) combined with 3 particle sizes (Larger (1), medium (2) and smaller (3)). After 60 days silos were opened, effluent and gas yield was calculated. Reduction in particle size lowered gas losses in silage. Major benefit …
Possibilities To Avoid Growth Of Clostridia And/Or Fungi In Wilted Silage By Use Of Organic And Inorganic Salts, Martin Knický, P. Lingvall
Possibilities To Avoid Growth Of Clostridia And/Or Fungi In Wilted Silage By Use Of Organic And Inorganic Salts, Martin Knický, P. Lingvall
IGC Proceedings (1977-2023)
The hygienic quality of silage will be of great importance in the future as poor quality not only influences the animal production but also the animal health and the food quality. This study examined the impact of mixtures of sodium benzoate (NaB), sodium nitrite (NaN), hexamine (HMTA), sodium propionate (NaP), sodium bisulphite, and propionic acid on low and high wilted clover/grass. The silage (crop wilted to 300 or 600 g DM kg-1 of fresh weight) consisted of about 50% red clover (Trifolium pratense) and 50% timothy (Phleum pratense) and the study covered 7 additive treatments. …
An Assessment Of Grass Regeneration Nurseries At The Western Regional Plant Introduction Station, 1994-1997, V. L. Bradley, R. C. Johnson
An Assessment Of Grass Regeneration Nurseries At The Western Regional Plant Introduction Station, 1994-1997, V. L. Bradley, R. C. Johnson
IGC Proceedings (1977-2023)
The Western Regional Plant Introduction Station (WRPIS), Pullman, WA, USA, maintains over 17,000 accessions of forage and turf grasses that are mostly wind cross-pollinated and highly heterogenic. Regeneration procedures have been refined over the past nine years to include improved isolation distance and increased plant populations for regeneration. The grass regeneration nurseries planted from 1994 through 1997 were evaluated using data recorded in the Germplasm Resources Information Network (GRIN) and it was found that approximately 78% of the regenerations were successful. Reasons for failures were contributed to inadequate plant number, presence of disease, seed shattering, and unsuitable growing environment. Several …
Assessment Of Ensilability Of Six Tropical Grasses Using Three Different Approaches, B. Zierenberg, K. Friedel, A. Glatzle, A. Chudy
Assessment Of Ensilability Of Six Tropical Grasses Using Three Different Approaches, B. Zierenberg, K. Friedel, A. Glatzle, A. Chudy
IGC Proceedings (1977-2023)
The preparation of well-preserved silages is considered increasingly important in the tropics and subtropics. In these regions silage production played a minor role in the past, as ensilability of tropical grasses is generally considered poor. In this study ensilability of six tropical grasses grown in the Paraguayan Chaco Boreal (Panicum maximum cv. Gatton, Cynodon plectostachyus, Cynodon sp. cv. Tifton 85, Digitaria eriantha var. pentzii, Panicum maximum cv. Tanzania and Digitaria milanjiana) was assessed in three different ways: (1) The chemical determination of the ratio between water soluble carbohydrates (WSC) and buffer capacity (BC), (2) the biological …
Improving The Feeding Value Of Cotton Stalk, Wheat Straw And Rice Straw With Ozonation, Meiji Okamoto, Masaaki Hanada, R. Aoyama, R. Kim, N. Kaiga
Improving The Feeding Value Of Cotton Stalk, Wheat Straw And Rice Straw With Ozonation, Meiji Okamoto, Masaaki Hanada, R. Aoyama, R. Kim, N. Kaiga
IGC Proceedings (1977-2023)
The experiment was conducted to study the effect of ozone treatment on the feed value of cotton stalk, wheat straw and rice straw. These feeds were cut into 2 cm and 4 cm lengths, and rolled before ozonizing. The ozonizing periods were 30 min. 60min and. 120 min. The Acid Detergent Lignin (ADL) concentration of the feeds decreased with ozone treatment. Except for rice straw, the short cutting treatment (2cm) decreased the concentration of ADL and Cellulose of the ozonized cotton stalk and wheat straw. Rolling and ozone treatment were effective in decreasing the ADL concentration of cotton stalk. IVDMD …
Fermentation Quality Of Phasey Bean And Guineagrass Silages, Y. Imura, T. Namihira, Yasuhiro Kawamoto
Fermentation Quality Of Phasey Bean And Guineagrass Silages, Y. Imura, T. Namihira, Yasuhiro Kawamoto
IGC Proceedings (1977-2023)
Silages were made from guineagrass (Panicum maximum Jacq. var. maximum) and phasey bean (Macroptilium lathyroides (L.) Urb.) at three-growth stages. The silages were investigated in relation fermentation quality. Phasey bean silage showed a better fermentation quality than guineagrass silage. The latic acid to total acid ratio of phasey bean silage was higher than 500g/kg DM, and the volatile basic nitrogen to total nitrogen ratio was lower than 100g/kg. It is concluded that phasey bean is an unique legume suitable for good silage fermentation.
Evaluation Of Alternate Wetting And Drying Irrigation Management In Rice, Richard Lee Atwill Ii
Evaluation Of Alternate Wetting And Drying Irrigation Management In Rice, Richard Lee Atwill Ii
Theses and Dissertations
Water level declines in the Mississippi River Valley Alluvial Aquifer (MRVAA) are attributed largely to withdrawals for rice (Oryza sativa L.) irrigation. This study was performed to determine if alternative irrigation strategies for rice could reduce withdrawal from the MRVAA without having an adverse effect on grain yield, grain quality, control of barnyardgrass, and profitability. Research was conducted in Stoneville, MS and 19 on-farm locations across the Delta region of Mississippi from 2014 through 2017 to determine the irrigation threshold for alternate wetting and drying (AWD) rice irrigation, the effect of AWD management on barnyardgrass control, and effects of …
Burning And Management Alternatives On Forage Accumulation And Floristic Composition Of A Native Pasture, I. Heringer, A. V. A. Jacques
Burning And Management Alternatives On Forage Accumulation And Floristic Composition Of A Native Pasture, I. Heringer, A. V. A. Jacques
IGC Proceedings (1977-2023)
The forage accumulation and floristic composition of native pasture, submitted to burning and alternative management practices, was evaluated during one year. The experimental design was a completely randomized, with five treatments and three replications. The forage accumulation was evaluated in a grazing exclusion cage, and the floristic composition was estimated with Botanal method. The systems without burning were more productive and, among these, the forage accumulation was similar between the one without burning and without mowing and the improve treatments, and the annual accumulation was greater than 9,000 Kg/ha of green forage dry matter. The species Paspalum notatum, P. …
Nitrogen Flow To Duodenum Of Steers Grazing On Orchardgrass And Meadowfescue Pastures, Masaaki Hanada, Y. Aibibula, Meiji Okamoto
Nitrogen Flow To Duodenum Of Steers Grazing On Orchardgrass And Meadowfescue Pastures, Masaaki Hanada, Y. Aibibula, Meiji Okamoto
IGC Proceedings (1977-2023)
This experiment was conducted to evaluate nitrogen flow to the duodenum of steers grazing on orchardgrass (Dactylis glomerata L., OG) or meadowfescue (Festuca elatior L., MF) pasture. Holstein steers fitted with cannulas in the rumen and duodenum were used. Nitrogen content and in vitro dry matter digestibility of herbage did not differ between OG and MF pastures. Herbage nitrogen intake of steers grazing on OG and MF pastures averaged 229 and 271 g/day, respectively. Nitrogen flows to the duodenum of steers grazing on orchardgrass and meadowfescue pastures averaged 187 and 195g/d, respectively. Microbial nitrogen flow to the duodenum …
The Effects Of Post-Grazing Sward Conditions On Herbage Accumulation In Winter And Spring, F. P. Hughes, P. N. P. Matthews, C. Matthew
The Effects Of Post-Grazing Sward Conditions On Herbage Accumulation In Winter And Spring, F. P. Hughes, P. N. P. Matthews, C. Matthew
IGC Proceedings (1977-2023)
Two on-farm experiments were conducted in the winter and spring of 1998 on a New Zealand seasonal production dairy farm to determine the effect of herbage mass present after grazing on subsequent pasture growth rates. Experiments involved a range of post-grazing levels of herbage mass (870, 1140, 1390, 1640, 1920 kg DM/ha in winter, and 1100, 1420, 1700 and 1910 kg DM/ha in spring) representing a range in cow intakes of 6.1-20.0 and 7.6-18.5 kg DM/cow/day in winter and spring, respectively. In both experiments there was a range of postgrazing herbage mass (1200-1600 kg DM/ha in winter and 1400-1800 kg …
Pengaturan Suhu Inkubasi Dan Perlakuan Benih Dalam Upaya Meningkatkan Daya Tumbuh Benih Carica, Yugi Rahayu Ahadiyat, Pramesti Budi Arini
Pengaturan Suhu Inkubasi Dan Perlakuan Benih Dalam Upaya Meningkatkan Daya Tumbuh Benih Carica, Yugi Rahayu Ahadiyat, Pramesti Budi Arini
Jurnal Kultivasi
Buah carica merupakan jenis buah khas tropis namun memiliki kendala dalam produksi benihnya. Benih carica memiliki daya kecambah rendah disebabkan oleh adanya lapisan sarcotesta yang menjadi penghambat dalam proses perkecambahan. Penelitian ini bertujuan untuk mengetahui pengaruh penghilangan lapisan sarcotesta terhadap viabilitas benih carica dan menentukan suhu optimum untuk mematahkan dormansi benih dan mempertahankan viabilitas benih carica. Penelitian ini dilaksanakan menggunakan Rancangan Acak Kelompok yang terdiri daridua faktor, yaitu faktor penghilangan lapisan sarcotesta terdiri atas benih tanpa sarcotesta dan ber-sarcotesta, sertafaktor inkubasi suhu, yang terdiri atas inkubasi 15 ºC, 25 ºC, 35 ºC, dan 45 0C. Variabel yang diamati antara lain …
Sustainable Intensification For A Larger Global Rice Bowl, Shen Yuan, Bruce A. Linquist, Lloyd T. Wilson, Kenneth G. Cassman, Alexander M. Stuart, Valerien Pede, Berta Miro, Kazuki Saito, Nurwulan Agustiani, Vina Eka Aristya, Leonardus Y. Krisnadi, Alencar Junior Zanon, Alexandre Bryan Heinemann, Gonzalo Carracelas, Nataraja Subash, Pathula S. Brahmanand, Tao Li, Shaobing Peng, Patricio Grassini
Sustainable Intensification For A Larger Global Rice Bowl, Shen Yuan, Bruce A. Linquist, Lloyd T. Wilson, Kenneth G. Cassman, Alexander M. Stuart, Valerien Pede, Berta Miro, Kazuki Saito, Nurwulan Agustiani, Vina Eka Aristya, Leonardus Y. Krisnadi, Alencar Junior Zanon, Alexandre Bryan Heinemann, Gonzalo Carracelas, Nataraja Subash, Pathula S. Brahmanand, Tao Li, Shaobing Peng, Patricio Grassini
Department of Agronomy and Horticulture: Faculty Publications
Future rice systems must produce more grain while minimizing the negative environmental impacts. A key question is how to orient agricultural research & development (R&D) programs at national to global scales to maximize the return on investment. Here we assess yield gap and resource-use efficiency (including water, pesticides, nitrogen, labor, energy, and associated global warming potential) across 32 rice cropping systems covering half of global rice harvested area. We show that achieving high yields and high resource-use efficiencies are not conflicting goals. Most cropping systems have room for increasing yield, resource-use efficiency, or both. In aggregate, current total rice production …
Pengaruh Bahan Organik Terhadap Kesuburan Tanah Serta Pertumbuhan Dan Fisiologi Tanaman Kakao Muda Hasil Transplanting Di Tanah Inceptisol, Santi Rosniawaty, Rija Sudirja, Mira Ariyanti, Syariful Mubarok, Agus Wahyudin
Pengaruh Bahan Organik Terhadap Kesuburan Tanah Serta Pertumbuhan Dan Fisiologi Tanaman Kakao Muda Hasil Transplanting Di Tanah Inceptisol, Santi Rosniawaty, Rija Sudirja, Mira Ariyanti, Syariful Mubarok, Agus Wahyudin
Jurnal Kultivasi
Penanaman bibit kakao pada tanah inceptisol memiliki beberapa kendala, salah satunya adalah bahan organik rendah. Peningkatan pertumbuhan tanaman kakao pada awal tanam dapat dilakukan dengan pemberian bahan organik. Saat ini terdapat bahan organik berbentuk cair, namun pengaruhnya terhadap kakao belum menghasilkan belum diketahui, karena pada umumnya bahan organik yang digunakan pada tanaman kakao berbentuk padat. Tujuan penelitian ini untuk melihat pengaruh bahan organik berbeda (asam humat dan pupuk kotoran sapi) terhadap kesuburan tanah, pertumbuhan, dan fisiologi tanaman kakao belum menghasilkan. Percobaan dilakukan pada bulan Januari sampai Desember 2017 di kebun percobaan Fakultas Pertanian, Universitas Padjadjaran, Jatinangor. Rancangan percobaan yang digunakan …
Spring Regrowth And Steer Performance On Tifton 85 And Coastal Bermudagrass Pastures Following Sod-Seeding With Ryegrass, G. M. Hill, R. N. Gates
Spring Regrowth And Steer Performance On Tifton 85 And Coastal Bermudagrass Pastures Following Sod-Seeding With Ryegrass, G. M. Hill, R. N. Gates
IGC Proceedings (1977-2023)
Effects of autumn sod-seeded ryegrass (Lolium multiflorum; cv. Passerel; 37.7 kg/ha) in bermudagrass pastures (Cynodon spp.; cv. Coastal and cv. Tifton 85) on grazing steer performance were determined. Ryegrass was sod-seeded in three of six .81 ha pastures of each bermudagrass. Forage height was adjusted to10 cm during spring. Stocking rates were unaffected by ryegrass in Tifton 85 pastures, but they were higher (P < .05) for Tifton 85 than Coastal. Ryegrass increased tester steer average daily gains by 34% (.86 vs .64 kg/day; P < .01), and gain/ha by 26% (387 vs 306 kg/ha; P < .05). Higher stocking rates resulted in 22% more grazing days (515 vs 421 days/ha; P < .01), and 30% higher gain/ha (391 vs 301 kg/ha; P < .05) for Tifton 85 than Coastal pastures. Ryegrass did not affect stocking rates or steer performance on Tifton 85, but it depressed both on Coastal pastures.
Intensive Grazing Systems For Beef Cattle Production, F. P. Fontenot, V. G. Allen, M. A. Cochran, N. B. Frank
Intensive Grazing Systems For Beef Cattle Production, F. P. Fontenot, V. G. Allen, M. A. Cochran, N. B. Frank
IGC Proceedings (1977-2023)
The objective of this study was to compare grazing systems that used rotational and continuous stocking for beef cows-calves and stocker cattle grazing fescue (Festuca arundinacea) and clover (Trifolium repens). For each system seven cows/calves and seven stocker steers were used within each of two replicates. The cows and stockers grazed stockpiled forage and were fed hay in winter, and grazed growing forage during spring and summer. Cows in the rotational system gained at a faster rate (P< . 05) from October to April than those in the continuous system. Daily gains of calves were higher (P< . 05) for the continuous system. Rate of gain during the last 28 days was higher (P< . 05) for the stockers in the rotational system. Average hay yields were not different for the two stocking systems, but more (P< . 05) hay was fed to the cattle in the continuous system. The system that used continuous stocking was more easily managed and required less labor and facilities.
Intake Estimation Of Rams Under Grazing Condition In A Deferred Pastures Of Panicum Coloratum By Two Techniques, C. M. Ferri, M. A. Brizuela, N. P. Stritzler, H. J. Petruzzi
Intake Estimation Of Rams Under Grazing Condition In A Deferred Pastures Of Panicum Coloratum By Two Techniques, C. M. Ferri, M. A. Brizuela, N. P. Stritzler, H. J. Petruzzi
IGC Proceedings (1977-2023)
The goal of this study was to quantify the organic matter intake (OMI) of Pampinta rams grazing in a Panicum coloratum cv Verde differed pasture. The OMI was compared by two methods: a) the difference between the forage measured in pre and post-grazing condition, and b) the faecal production:digestibility ratio of the diet, estimated by total faecal gathering, and from the quantity of total faecal N in g per 100 g-1 of OMI and the concentration of total faecal N, respectively. The OMI estimated by difference between the forage measured in pre and post-grazing was 9 % higher (P …
Estimation Of Organic Matter Digestibility And Intake From Faecal Organic Matter And Daily N Excretion And Concentration, C. M. Ferri, N. P. Stritzler, M. A. Brizuela
Estimation Of Organic Matter Digestibility And Intake From Faecal Organic Matter And Daily N Excretion And Concentration, C. M. Ferri, N. P. Stritzler, M. A. Brizuela
IGC Proceedings (1977-2023)
This study was performed with grazing sheep, to establish: a) if the amount of total faecal N (C; in g 100g-1 of organic matter intake (OMI)) remains constant at three feeding levels, in four utilisation periods of deferred Panicum coloratum cv. Verde; b) the relationship between C and faecal N fractions, and c) the relationship between faecal daily excretion of OM and N, and OMI. Intake increased (P< 0.01) with utilisation period, and was related (r = - 0.82; P< 0.01) to the protein content of food, the insoluble N fraction (r = -0.49; P< 0.01) and the soluble:insoluble N ratio (r = 0.41; P< 0.01) in faeces. No relation with total N concentration (r = -0.22; P> 0.05) or soluble N fraction (r = -0.02; P> 0.05) in faeces could be found. Daily excretion of OM and N were positively related (R2 = 0.93 and 0.96, respectively; …
Effects Of Fertilization And Legume Introduction On The Forage Production Of Brachiaria Decumbens Pastures, M. R. Correa, Tsutomu Kanno, Manuel C. M. Macedo, J. D. G. Santos Junior, L. G. Beretta
Effects Of Fertilization And Legume Introduction On The Forage Production Of Brachiaria Decumbens Pastures, M. R. Correa, Tsutomu Kanno, Manuel C. M. Macedo, J. D. G. Santos Junior, L. G. Beretta
IGC Proceedings (1977-2023)
A grazing experiment was conducted to examine the effects of P and K fertilization and legume introduction on the forage production of Brachiaria decumbens (BD) pastures. Amount of biomass, dry matter production and forage quality were evaluated on BD pastures where three treatments were applied: without maintenance fertilizer (BD-N), with maintenance fertilizer (BD-F), and BD and Stylosanthes guianensis cv. Mineirao (SG) mixture with maintenance fertilizer (BD-FL). The fertilizer application increased an annual average of biomass and the contents of P and K in the leaves. On the other hand, the legume introduction had a positive influence on crude protein and …
Effect Of Five Different Rest Periods On Tiller Regrowth Of Ryegrass, R. W. Coelho, W. R. Ocumpaugh
Effect Of Five Different Rest Periods On Tiller Regrowth Of Ryegrass, R. W. Coelho, W. R. Ocumpaugh
IGC Proceedings (1977-2023)
Five rest periods were imposed from April to May on a mixed pasture of two ryegrass (Lolium multiflorum Lam.) varieties and white clover (Trifolium repens L.). The rest period starting dates were: April 4, April 18, May 2, May 16, and May 30, for rest periods 1, 2, 3, 4, and 5, respectively. The total area allocated to the experiment was 1.1 ha, which was divided into 22 pastures. The experimental design used was a split-plot. Rest period was assigned to the main plot, grass to the subplot and legume to the subsubplot. The pastures were “mob-grazed” by …
Aboveground Standing Crop Of An Ungrazed Elyonurus Muticus Grassland Under Annual Burning In The Pantanal, Brazil, E. L. Cardoso, S. M. A. Crispim, C. A. G. Rodrigues
Aboveground Standing Crop Of An Ungrazed Elyonurus Muticus Grassland Under Annual Burning In The Pantanal, Brazil, E. L. Cardoso, S. M. A. Crispim, C. A. G. Rodrigues
IGC Proceedings (1977-2023)
This study was conducted in the Pantanal of Mato Grosso do Sul state, Brazil, from September 1995 to July 1997. The objective was to evaluate the effect of annual burning on grasses and forbs biomass and standing dead in an ungrazed grassland of Elyonurus muticus. In two areas, one free of burning (control) and another area with annual burning, grasses, forbs aboveground biomass, and standing dead were collected. The experimental design was completely randomized with 10 replications. Burning modified the grasses and forbs biomass dynamics when compared to the area free of burning. After the first burning the grasses …
Contract Grazing Of Young Beef Cattle On Ryegrass In The Southeastern Usa, David I. Bransby
Contract Grazing Of Young Beef Cattle On Ryegrass In The Southeastern Usa, David I. Bransby
IGC Proceedings (1977-2023)
The objective of this study was to evaluate contract grazing (in which the landowner grazes cattle owned by someone else for a specified fee) as an alternative to traditional ownership of the cattle, in order to improve profitability of grazing young beef cattle on annual ryegrass under limited availability of operating capital in the southeastern USA. Production data from a two-year grazing experiment were used as a basis for an economic analysis which assumed market prices for the beef industry in the region. Return/ha over animal and pasture costs was $312.20 for contract grazing, and $477.50 for purchased cattle. However, …
Horses Grazing Management To Promote Distribution Of Lotus Tenuis (Waldst. Et Kit) In A Temperate Grassland, O. E. Ansín
Horses Grazing Management To Promote Distribution Of Lotus Tenuis (Waldst. Et Kit) In A Temperate Grassland, O. E. Ansín
IGC Proceedings (1977-2023)
In a temperate grassland of the Argentine Pampa, the birdsfoot trefoil (Lotus tenuis Waldst. et Kit) distribution was analyzed as a consequence of the grazing method used. In a plot of 40 ha occupied by native grassland an area of 16 ha was implanted with reed canary grass (Phalaris aquatica L.) and L. tenuis. This area was divided into two parts that contained the same pasture and native grassland surfaces, being grazed by horses. One, under continuous grazing and another one, under a controlled grazing. In the continuous grazing the whole year the animals had permanently access …
Climate And Agronomy, Not Genetics, Underpin Recent Maize Yield Gains In Favorable Environments, Gonzalo Rizzo, Juan Pablo Monzon, Fatima Amor Tenorio, Réka Howard, Kenneth G. Cassman, Patricio Grassini
Climate And Agronomy, Not Genetics, Underpin Recent Maize Yield Gains In Favorable Environments, Gonzalo Rizzo, Juan Pablo Monzon, Fatima Amor Tenorio, Réka Howard, Kenneth G. Cassman, Patricio Grassini
Department of Agronomy and Horticulture: Faculty Publications
Quantitative understanding of factors driving yield increases of major food crops is essential for effective prioritization of research and development. Yet previous estimates had limitations in distinguishing among contributing factors such as changing climate and new agronomic and genetic technologies. Here, we distinguished the separate contribution of these factors to yield advance using an extensive database collected from the largest irrigated maize-production domain in the world located in Nebraska (United States) during the 2005-to-2018 period. We found that 48% of the yield gain was associated with a decadal climate trend, 39% with agronomic improvements, and, by difference, only 13% with …