Rapid evaluation method for rice (Oryza sativa L.) straw feeding quality

•NSC content was significantly correlated with IVDMD and fermentation quality.•The top 3rd node of stem was the main NSC storage organ in rice straw.•The starch content in the top 3rd node of stem correlated with NSC content.•The starch particle quantity in stem was consistent with its starch conten...

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Bibliographic Details
Published in:Field crops research 2018-11, Vol.228, p.204-209
Main Authors: Dong, Chenfei, Xu, Nengxiang, Ding, Chenglong, Gu, Hongru
Format: Article
Language:English
Subjects:
Free hand sections
Rapid evaluation
Rice straw
Starch particle
The top 3rd internode
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Summary:•NSC content was significantly correlated with IVDMD and fermentation quality.•The top 3rd node of stem was the main NSC storage organ in rice straw.•The starch content in the top 3rd node of stem correlated with NSC content.•The starch particle quantity in stem was consistent with its starch content.•Free hand sections of the top 3rd node would be a rapid screening method. Since conventional methods to evaluate the feeding quality of rice (Oryza sativa L.) straw were time consuming, this study was conducted to investigate the potential of a rapid evaluation method for rice straw feeding quality. Nine rice cultivars in 2011 and ten rice cultivars in 2012 were used in this experiment. The feeding quality related traits (such as nonstructural carbohydrates (NSC), crude protein (CP) and acid detergent fiber (ADF) content, in vitro dry matter digestibility (IVDMD), and the fermentation quality related traits (pH, lactic acid (LA) and NH3-N concentration) of rice straw were analyzed. The fresh top 3rd inter-nodes of stem were used to make freehand sections. The results indicated that the NSC content in the whole plant of rice straw was positively correlated with its IVDMD and the fermentation quality (p 
ISSN:0378-4290
1872-6852
DOI:10.1016/j.fcr.2018.09.007