Effects of Dietary Fiber and Reduced Crude Protein on Ammonia Emission from Laying-Hen Manure
| Autor: | James R. Russell, Hongwei Xin, Kristjan Bregendahl, Brian J. Kerr, Stacey Roberts |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Dietary Fiber
Nitrogen Oviposition Soybean meal Distillers grains Feces Ammonia chemistry.chemical_compound Animals Food science Fiber Wheat middlings Kjeldahl method Chemistry General Medicine Animal Feed Manure Diet Neutral Detergent Fiber Animal Nutritional Physiological Phenomena Environmental Pollutants Female Animal Science and Zoology Dietary Proteins Chickens |
| Zdroj: | Poultry Science. 86:1625-1632 |
| ISSN: | 0032-5791 |
| DOI: | 10.1093/ps/86.8.1625 |
| Popis: | Ammonia (NH(3)) emission is a major concern for the poultry industry. The objective of this research was to determine whether inclusion of dietary fiber and a reduced dietary CP content would decrease NH(3) emission from laying-hen manure. A total of 256 Hy-Line W-36 hens were fed diets with 2 levels of CP (normal and reduced) and 4 fiber treatments in a 2 x 4 factorial arrangement. The fiber treatments included a corn and soybean meal-based control diet and diets formulated with either 10.0% corn dried distillers grains with solubles (DDGS), 7.3% wheat middlings (WM), or 4.8% soybean hulls (SH) to contribute equal amounts of additional neutral detergent fiber. The CP contents of the reduced-CP diets were approximately 1 percentage unit lower than those of the normal-CP diets. All diets were formulated on the basis of digestible amino acid content and were formulated to be isoenergetic. Fresh manure was collected such that pH, uric acid, and Kjeldahl N contents could be measured. The NH(3) emission from manure was measured over 7 d by placing pooled 24-h manure samples in NH(3) emission vessels. Data were analyzed by ANOVA with Dunnett's multiple-comparisons procedure to compare results from the fiber treatments with the control, whereas the main effect of protein was used to compare the normal- and reduced-CP treatments. Dietary corn DDGS, WM, or SH lowered (Por= 0.01) the 7-d cumulative manure NH(3) emission from 3.9 g/kg of DM manure for the control to 1.9, 2.1, and 2.3 g/kg of DM manure, respectively, and lowered (P0.05) the daily NH(3) emission rate. Results of this study showed that dietary inclusion of 10.0% corn DDGS, 7.3% WM, or 4.8% SH lowered NH(3) emission from laying-hen manure; however, reducing the CP content by 1 percentage unit had no measurable effect on NH(3) emission. |
| Databáze: | OpenAIRE |
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