Feed Science and Technology

Effects of Shading in Filling Stage on Nutrient Composition and in Vitro Fermentation of Yangmai 15 Wheat Straw

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  • Laboratory of Gastrointestinal Microbiology, Nanjing Agricultural University, Nanjing 210095, China

Received date: 2015-04-09

  Online published: 2015-10-15

Abstract

This study was conducted to investigate the effects of shading in filling stage on nutrient composition and in vitro fermentation of Yangmai 15 wheat straw.Yangmai 15 wheat straw was used as experimental material, and shading treatments were set as three shading levels (0, 50% and 66%) and three shading time (2, 4 and 8 d).The nutrient composition and in vitro disappearance rate of wheat straw were measured after harvested.The results showed as follows: 1) compared with 0 group, crude protein content in shading groups of 50% and 66% was significantly decreased (P<0.05).There were no significant effects of shading time and the interaction of level and time of shading on nutrient composition of wheat straw (P>0.05).2) compared with 0 group, in vitro disappearance rates of dry matter and neutral detergent fiber in shading groups of 50% and 66% were significantly decreased (P<0.05).There were no significant effects of shading time and the interaction of level and time of shading on in vitro disappearance rates of nutrients of wheat straw (P>0.05).Gas production was decreased by treatments of level and time of shading.Total volatile fatty acid (TVFA) yield was significantly decreased with the increase of shading time, acetate yield was significantly decreased with the increase of shading level and time (P<0.05), and there was significant interaction of shading level and time (P<0.05), however, propionate and butyrate yield, and acetate/propionate were not affected (P>0.05).In conclusion, with shading treatment, crude protein content, in vitro disappearance rates of dry matter and neutral detergent fiber, gas production, TVFA and acetate yield can be decreased, but acetate/propionate will not be affected; the effects enhanced with the increase of level and time of shading.

Cite this article

HE Xiangyu, LI Yuanfei, CHENG Yanfen, ZHU Weiyun . Effects of Shading in Filling Stage on Nutrient Composition and in Vitro Fermentation of Yangmai 15 Wheat Straw[J]. Chinese Journal of Animal Nutrition, 2015 , 27(10) : 3163 -3169 . DOI: 10.3969/j.issn.1006-267x.2015.10.023

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