Effects of Compound Ammonia Treatment on Nutrient Composition and Rumen Degradation Characteristics of Rice Straw in Southern China

MA Yulin; CHEN Xu; YU Jiangnan; XIAO Jianxin; LIU Shuai; WANG Jingjun; CAO Zhijun

doi:10.3969/j.issn.1006-267x.2020.06.026

2020 , Vol. 32 >Issue 6: 2674 - 2682

DOI: https://doi.org/10.3969/j.issn.1006-267x.2020.06.026

Effects of Compound Ammonia Treatment on Nutrient Composition and Rumen Degradation Characteristics of Rice Straw in Southern China

MA Yulin ,
CHEN Xu ,
YU Jiangnan ,
XIAO Jianxin ,
LIU Shuai ,
WANG Jingjun ,
CAO Zhijun

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State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China

Received date: 2019-12-19

Online published: 2020-06-16

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Abstract

This study was conducted to investigate the effects of compound ammonia treatment on nutrient composition and rumen degradation characteristics of rice straw in southern China. Experiment was set 1 control treatment and 4 compound ammonia treatments, which added 5% urea group (5U), 9% corn steep liquor + 5% urea group (9C5U), 9% corn steep liquor + 2.5% urea group (9C2.5U), 9% corn steep liquor + 2.5 % urea + 3% molasses group (9C2.5U3M), respectively. Samples were collected after 0, 3, 7, 14, 30 and 60 days of ammonization, and analyzed for nutritional components. Then the rumen degradation rate of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF) and acid detergent fiber (ADF) of rice straw in control and compound ammoniated treatments was measured by nylon bag method. The results showed as follows: 1) compound ammonia treatment could significantly reduce NDF and ADF contents in rice straw (P<0.05), CP content in rice straw was significantly increased (P<0.05). With the extension of ammonia time, the DM content remained unchanged. NDF and CP contents were decreased gradually (P<0.05), and ADF content gradually increased (P<0.05). 2) The effective degradation rates of DM, NDF, ADF and CP of compound ammonia treatments were significantly higher than those of control treatment (P<0.05). Among them, the effective degradation rate of DM, NDF and ADF in the 5U treatment was the highest, and the effective degradation rate of CP in the 9C5U treatment was the highest. It is concluded that compound ammonia treatment can decrease the NDF and ADF contents of rice straw, and significantly improve the rumen degradation rate of DM, CP, NDF and ADF of rice straw; at 30 days of ammonization, the nutrients tend to be stable. Rice straw is best treated with 9% corn steep liquor and 5% urea.

Key words： rice straw; compound ammonia; nylon bag method; rumen degradation

Cite this article

MA Yulin , CHEN Xu , YU Jiangnan , XIAO Jianxin , LIU Shuai , WANG Jingjun , CAO Zhijun . Effects of Compound Ammonia Treatment on Nutrient Composition and Rumen Degradation Characteristics of Rice Straw in Southern China[J]. Chinese Journal of Animal Nutrition, 2020 , 32(6) : 2674 -2682 . DOI: 10.3969/j.issn.1006-267x.2020.06.026

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