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 “"nutrient excretion"”.
-
Technologies to Reduce Nutrient Excretion and Odor Production in Swine
… Reducing CP decreased (P < 0.001) urinary N excretion by 56% and total N excretion by 41%. Overall, for every one percentage unit reduction in dietary CP (combined with AA supplementation) there were reductions in total N losses (fecal plus urinary) by 8%, and ammonia production by 15%, but …
-
The effect of resource stoichiometry on fish and macroinvertebrate nutrient excretion
Consumer-driven nutrient cycling has been shown to be an important process in supplying inorganic nutrients to autotrophic and heterotrophic organisms in aquatic ecosystems. Theory indicates that consumer nutrient excretion is influenced primarily by an organism's nutrient composition; however, an …
-
Nutritional and Management Practices to Reduce Excessive Nutrient Excretion on Dairy Farms
A 2-yr field study was conducted to reduce nutrient losses from Virginia dairy farms through nutritional and herd management practices. Ten collaborator herds were identified, all at state DHIA average or better for milk yield and days open. Baseline feed samples and ration information were …
-
Reducing Nutrient Excretion via Improved Nutrient Utilization by Supplementing Pig and Poultry Diets with Phytase Enzyme
… the efficacy of phytase for improving the nutrient utilization for pigs and poultry. Two experiments, one with broilers and one with pigs, were conducted to compare the efficiency of transgenic microbial (Natuphosà ) and plant (Phytaseedà ) phytase for enhancing the utilization of phytate P …
-
Starch Digestion and Phosphorus Excretion in Lactating Dairy Cows
… period, while rumen fluid was sampled on d 18. Excretion of feces, urine, P, and N was lower in cows fed SF than in cows fed DG. Milk yield was unaffected by diet despite a lower DMI by cows fed SF. Cows fed SF tended to have a higher feed efficiency and lower milk urea nitrogen (MUN) …
-
Are aquatic food webs vulnerable to copper and gold engineered nanoparticles?
… The interaction between nanoparticles (NPs) and nutrients remains poorly understood within the context of aquatic food webs. To address this interaction, I examined the impacts of a citrate-coated gold nanoparticle (AuNPs) and a commercial pesticide containing Cu(OH)2 nanoparticles (CuNPs) on …
-
INFLUENCES OF DISEASE-DRIVEN AMPHIBIAN DECLINES ON ECOSYSTEM STRUCTURE AND FUNCTION IN PANAMANIAN HEADWATER STREAMS
… carbon (C), influencing ecosystems by altering nutrient supplies to other animals and their food resources. I used ecological stoichiometry as a framework to assess how the sudden loss of consumer biodiversity in neotropical headwater streams affected ecosystem function. I quantified N and P …
-
Manure and Nutrient Accretion, Partitioning, and Excretion in Holstein Heifers
… widely researched topic, publications concerning nutrient utilization, partitioning, and excretion are scarce and are becoming necessary. That combined with the fact that feeding programs for heifers are highly variable from region to region and even from farm to farm indicated the need to examine …