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| Registros recuperados: 123 | |
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| Thacker, P.A.; Haq, I.; Willing, B.P.; Leytem, A.B.. |
| A total of 240 day-old broiler chicks were used to study the effects of phytase on performance and phosphorus (P) excretion from birds fed diets containing low phytate barleys formulated without inorganic P. A positive control based on Harrington barley (HB) was formulated to meet requirements for total P. Three experimental diets, based on either HB (0.39% total P with 0.28% phytate P) or the low phytate varieties LP 422 (0.36% total P with 0.14% phytate P) and LP 955 (0.40% total P with 0.0 I% phytate P), were formulated to be below requirements for total P by removing all the inorganic P from the diet. The four diets were fed with and without 1,000 FTU/kg phytase. Apparent P digestibility was significantly higher (p<0.01) for birds fed the low... |
| Tipo: Article |
Palavras-chave: Animal. |
| Ano: 2009 |
URL: http://eprints.nwisrl.ars.usda.gov/1327/1/1304.pdf |
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| Moore, A.; Ippolito, J.A.. |
| A rising concern with the application of dairy wastes to agricultural fields is the accumulation of copper (Cu) in the soil. Copper sulfate (CuSO4) from cattle footbaths is washed out of dairy barns and into wastewater lagoons. The addition of CuSO4 baths can increase Cu concentration significantly in manure slurry, from approximately 5.0 grams per 1,000 liters to 90.0 grams per 1,000 liters. The Cu-enriched dairy waste is then applied to agricultural crops, thus raising concerns about how soils and plants are impacted by these Cu additions. |
| Tipo: Technical Bulletin |
Palavras-chave: Animal. |
| Ano: 2009 |
URL: http://eprints.nwisrl.ars.usda.gov/1374/1/1347.pdf |
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| Leytem, A.B.; Bjorneberg, D.L.; Sheffield, R.E.; de Haro Marti, M.E.. |
| The volatilization of NH3 from landapplied manure is not only a loss of valuable N, but also an air quality concern because NH3 plays a role in the formation of airborne particulate matter, which can be a health hazard. The relative differences in potential NH3 losses from land application of liquid dairy manure were determined via 3 methods: surface application, Aerway incorporation (shallow incorporation with a rolling tine aerator), and subsurface injection. Liquid manure was applied at a rate of 190 m3/ha on 4 farms with average N and P application rates ranging from 28 to 130 kg N/ha and 6 to 36 kg P/ha, respectively. Average NH3 concentrations were measured with passive samplers for 3 d after manure application and ranged from 0.03 to 0.21 mg... |
| Tipo: Article |
Palavras-chave: Soil; Manure; Animal; Soil quality. |
| Ano: 2009 |
URL: http://eprints.nwisrl.ars.usda.gov/1366/1/1343.pdf |
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| Biswas, S; Shapiro, C.A.; Kranz, W.L.; Mader, T.L.; Shelton, D.P.; Snow, D.D.; Bartlett-Hunt, S.L.; Tarkalson, D.D.; vanDonk, S.J.; Zhang, T.C.; Ensley, S.M.. |
| Growth promoting steroids and steroid-like compounds (GPSC) used by the US beef cattle industry are potential contaminants to water resources. Manure generated in concentrated animal feeding operations contains GPSCs that may enter the environment. Several studies have focused on off-site impacts of GPSC in aquatic life and suggest possible adverse impacts such as abnormal blood hormone levels, masculinization of females, feminization of males, altered sex ratios, intersexuality and reduced fertility. Other studies point to potential human health impacts including increased incidence of human cancers, sexual disorders, and decline in male: female ratio in human beings. However, the use of GPSCs in beef production provides benefits to both cattle producers... |
| Tipo: Article |
Palavras-chave: Animal health; Animal. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1500/1/1463.pdf |
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| Franklin, A.M.; Aga, D.S.; Cytryn, Eddie; Durso, L.M.; Mclain, J.E.; Pruden, Amy; Roberts, M.C.; Rothrock, Jr, M.J.; Snow, D.D.; Watson, J.E.; Dungan, R.S.. |
| The presence of antibiotic drug residues, antibiotic resistant bacteria, and antibiotic resistance genes in agroecosystems has become a significant area of research in recent years, and is a growing public health concern. While antibiotics are utilized for human medicine and agricultural practices, the majority of antibiotic use occurs in food animals where these drugs have historically been used for growth promotion, in addition to prevention and treatment of disease. The widespread use of antibiotics combined with the application of human and animal wastes to agricultural fields introduces antibiotic-related contamination into the environment. While overt toxicity in organisms directly exposed to antibiotic in agroecosystems is generally not an issue due... |
| Tipo: Article |
Palavras-chave: Air Emissions; Animal; Runoff; Manure. |
| Ano: 2016 |
URL: http://eprints.nwisrl.ars.usda.gov/1614/1/1571.pdf |
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| Moore, A.; Ippolito, J.A.. |
| A rising concern with the application of dairy wastes to agricultural fields is the accumulation of copper (Cu) in the soil. Copper sulfate (CuSO4) from cattle foot baths are washed out of dairy barns and into wastewater lagoons. The addition of CuSO4 baths has been reported to increase Cu concentration significantly in manure slurry from 4.8 g/1000 L to 88.6 g/1000 L (Miner Institute, New York). The Cu-enriched dairy waste is then applied to agricultural crops, thus raising concerns about how soils and plants are impacted by these Cu additions. |
| Tipo: Technical Bulletin |
Palavras-chave: Animal. |
| Ano: 2009 |
URL: http://eprints.nwisrl.ars.usda.gov/1375/1/1348.pdf |
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| Leytem, A.B.; Widyaratne, G.P.; Thacker, P.A.. |
| Both intrinsic and exogenous phytase in poultry feeds can alter phytate utilization and the solubility of P excreted. This experiment determined the effects of feeding diets varying in cereal grain, P concentration and phytase addition on phytate and P utilization and P characterization of ileal digesta and excreta. Twelve treatments, consisting of diets based on corn, wheat, barley, or high fat-low lignin oat and 3 P treatments (low P with 0.30% nonphytate P; low P + 1,000 phytase units of phytase; high P with 0.45% nonphytate P), were fed to 300 broilers using a factorial design. Fresh excreta were collected at 20 and 21 d and ileal digesta was collected at 21 d. Ileal digesta and excreta were analyzed for total P, phytate P and Ca, with P... |
| Tipo: Article |
Palavras-chave: Animal; Phosphorous. |
| Ano: 2008 |
URL: http://eprints.nwisrl.ars.usda.gov/1325/1/1302.pdf |
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| Murray, R.B.; Mayland, H.F.; Van Soest, P.J.. |
| Seven grass species--desert wheatgrass (Agropyron desertorum), streambank wheatgrass (Agropyron riparium), cheatgrass (Bromus tectorum), basin wildrye (Elymus cirtereus), Sandberg's bluegrass (Poa sandbergii), bottlebrush squirreltail (Sitanion hystrix), and needle-and-thread grass (Stipa comata)--were harvested to a 1/2-inch (1.2-cm) stubble height periodically between mid-March and December in most years from 1962 through 1968 at the Saylor Creek Experimental Range in southern Idaho. These samples were analyzed for N, P, S, Ca, Mg, K, Na, Zn, Mn, Cu, and Fe. Certain digestibility fractions (NDF, NDF-ash, DCW, DCW-ash free, and TDDM) were also determined on these samples. In addition, estimates of the soil chemical status, soil moisture contents... |
| Tipo: Technical Bulletin |
Palavras-chave: Animal; Grass forage; Mass Import - autoclassified (may be erroneous). |
| Ano: 1978 |
URL: http://eprints.nwisrl.ars.usda.gov/1116/1/398.pdf |
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| Ippolito, J.A.; Barbarick, K.A.. |
| Organic waste beneficial-use programs effectively recycle plant nutrients when applied at agronomic rates. Plant-nutrient availability, transport, and fate questions have arisen when organic wastes such as biosolids have been applied to dryland agroecosystems. What is the Nfertilizer equivalency of biosolids? What is the N mineralization rate of biosolids over periods of excess moisture or drought, and over long periods of time? Would biosolids, applied at an agronomic N rate for dryland winter wheat (Triticum aestivum L.), oversupply P? If overapplication occurred, what would the repercussions be in terms of excess soil P? Our objectives were to determine: biosolids N fertilizer equivalency; biosolids N mineralization during years of above and below... |
| Tipo: Conference or Workshop Item |
Palavras-chave: Soil; Animal; Phosphorous; Chemistry. |
| Ano: 2010 |
URL: http://eprints.nwisrl.ars.usda.gov/1378/1/1350.pdf |
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| Bjorneberg, D.L.; King, B.A.. |
| Dairy production has expanded in irrigated areas of the western and southwestern US, potentially competing for limited water supplies. Groundwater withdrawal was measured for two years on six dairy farms with 660 to 6400 milk cows in southern Idaho. Groundwater withdrawal was calculated on an equivalent cow basis to account for relative differences in the numbers of milk cows, dry cows, heifers and calves on each farm. Average groundwater withdrawal from each dairy varied from 110 to 250 L/d/eq. cow with an overall average of 190 L/d/eq. cow for the six farms. On an area basis, groundwater withdrawal varied from 180 to 880 mm/y on each farm with a mean of 530 mm/y. Estimated annual irrigation requirements in southern Idaho are 510 mm for spring barley, 590... |
| Tipo: Article |
Palavras-chave: Animal; Water management. |
| Ano: 2014 |
URL: http://eprints.nwisrl.ars.usda.gov/1531/1/1489.pdf |
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| Ippolito, J.A.. |
| Dairies utilize copper sulfate (CuSO4) foot baths to control hoof infections. Typical solutions are 5 or 10% CuSO4 (pH ~6), equal to 12,500 or 25,000 ppm Cu, respectively. When spent, hoof bath solutions are usually disposed of in waste lagoons and subsequently utilized for irrigation. In the Magic Valley, this practice appears to be causing soil Cu concentrations to increase. The goal of our research was to use local waste products to sequester Cu from a simulated hoof bath solution and to use waste products to adsorb excessive Cu from Cu-affected soils. We utilized lime waste and fly ash from the Amalgamated Sugar Company, LLC (Twin Falls, ID) to identify Cu sorption maximum as a function of pH. In triplicate, solutions... |
| Tipo: Conference or Workshop Item |
Palavras-chave: Animal. |
| Ano: 2010 |
URL: http://eprints.nwisrl.ars.usda.gov/1382/1/1349.pdf |
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| Kebreab, Ermias; Hansen V, Anja; Leytem, A.B.. |
| Phosphorus (P) is an essential mineral that needs to be supplied in sufficient quantities for maintenance and growth and milk production in dairy cattle. However, over 60% of the P consumed can be excreted in faeces with a potential to cause environmental pollution. Concern over higher levels of P in intensively managed livestock systems has led to legislation such as the Water Framework Directive in the European Union. In this manuscript, several methods of reducing P pollution are discussed. A major source of environmental P pollution has been overfeeding P mainly due to addition of ‘safety margin’ over the animal’s requirement and concerns related to fertility. Matching the animal’s requirement and feeding in groups so that animals at the same... |
| Tipo: Article |
Palavras-chave: Animal; Manure; Phosphorous. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1512/1/1476.pdf |
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| Registros recuperados: 123 | |
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