Effects of Dietary Fiber and Reduced Crude Protein on Ammonia Emission from Laying-hen Manure.
From: Department of Animal Science, Iowa State University, Ames, IA 50011, USA.
Poultry science
- Publish Date: Aug 2007
- ISSN: 0032-5791
- Volume: 86
- Issue: 8
- Pages: 1625-32
- Medium: Print
- Language: English
- Citation (JAMA): Roberts S A, Xin H, Kerr B J, et al. Effects of Dietary Fiber and Reduced Crude Protein on Ammonia Emission from Laying-hen Manure.. Poult. Sci. Aug 2007;86:1625-32
Abstract
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 (P
Mesh Headings (Keywords): Ammonia, Animal Feed, Animal Nutrition Physiology, Animals, Chickens, Diet, Dietary Fiber, Dietary Proteins, Environmental Pollutants, Feces, Female, Manure, Nitrogen, Oviposition
Check for Full Text / PubMed Unique Identifier (PMID): 17626805
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