Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"nitrogen efficiency"”.
-
Ruminal Nitrogen Recycling and Nitrogen Efficiency in Lactating Dairy Cattle
Excess nitrogen (N) excretion from animal agriculture results in reduced air and water quality, and poses a risk to human health. Although the dairy industry utilizes milk urea N (MUN) to monitor protein feeding and N excretion, phenotypic diversity among cows may influence MUN and thus bias feed …
-
Nitrogen Efficiency and Regulation of Protein Synthesis in Lactating Dairy Cows
… to reduce AA catabolism and thereby increase efficiency of AA utilization. The objectives of the work presented in this dissertation were to test the effect of energy and N intake on cell regulatory mechanisms, nutrient kinetics, milk, milk protein yield, and N efficiency in dairy cows. The …
-
Improving nitrogen efficiency and profitability of dairy cattle in the United States
… mathematical ration-balancing model to predict N efficiency through a more accurate postabsorptive amino acid (AA) delivery. In experiment 1, dairy nutritionists (n = 77) that fed a total of 521,000 lactating dairy cows responded to a questionnaire related to demographic information, feelings …
-
Effects of reduced dietary protein and supplemented rumen protected amino acids on the nitrogen efficiency of dairy cows
… are extremely inefficient at converting dietary nitrogen (N) to productive N. Approximately 25-30% of dietary N is used for milk protein while the remaining N is lost to the environment. According to National Research Council (NRC, 2001) recommendations, dairy cow rations are formulated in terms …
-
Improving the Efficiency of Dairy Cattle Feeding
… and environmental incentives to increase N-efficiency. Work presented in the following chapters evaluated the impact of AA supplementation on milk production in dairy cattle, and evaluated the PREP10 and NRC (2001) nutrient requirement model predictions. In two feeding trials (Chapter 2 and …
-
The effect of rumen- protected protein and amino acids, and genetic milk casein polymorphism on dairy cows’ performance
… dairy industry’s production, particularly N efficiency, can effectively improve the supply of milk and reduce ammonia emissions per unit of milk. Furthermore, a more ample knowledge on genetic milk protein variants could help to improve milk yield efficiency. Rumen protected (RP) technologies …
-
Switchgrass as an Energy Crop: Fertilization, Cultivar, and Cutting Management
… in May, July, September, and November each year. Nitrogen fertilization had no effect on yield in 2001 and small residual effects in 2002 and 2003. Higher N removal was observed with two-cut management, where a high-yielding July cut had high shoot N concentrations. The amount of N removed as …