Effects of rice or wheat residue retention on the quality of milled japonica rice in a rice–wheat rotation system in China

作     者：Pengfu Hou Yanfeng Ding Guofa Zhang Quan Li Shaohua Wang She Tang Zhenghui Liu Chengqiang Ding Ganghua Li 

作者机构：College of Agronomy Nanjing Agricultural University/Key Laboratory of Crop Physiology Ecology and Production ManagementMinistry of Agriculture Daqing Normal University 

出 版 物：《The Crop Journal》 (作物学报（英文版）)

年 卷 期：2015年第3卷第1期

页      面：67-73页

核心收录：

学科分类：0710[理学-生物学] 09[农学] 0901[农学-作物学] 0902[农学-园艺学] 

基　　金：financial supported by the National Key Technology R&D Program of China (2012BAD04B08  2011BAD16B14) 

主　　题：Japonica rice Crop straw Grain quality Paddy–upland rotation 

摘      要：In rice–wheat rotation systems, crop straw is usually retained in the field at land preparation in every, or every other, season. We conducted a 3-year-6-season experiment in the middle–lower Yangtze River Valley to compare the grain qualities of rice under straw retained after single or double seasons per year. Four treatments were designed as: both wheat and rice straw retained(WR), only rice straw retained(R), only wheat straw retained(W), and no straw retained(CK). The varieties were Yangmai 16 wheat and Wuyunjing 23 japonica rice. The results showed contrasting effects of W and R on rice quality. Amylopectin content, peak viscosity, cool viscosity, and breakdown viscosity of rice grain were significantly increased in W compared to the CK, whereas gelatinization temperature,setback viscosity, and protein content significantly decreased. In addition, the effect of WR on rice grain quality was similar to that of W, although soil fertility was enhanced in WR due to straw being retained in two cycles. The differences in protein and starch contents among the treatments might result from soil nitrogen supply. These results indicate that wheat straw retained in the field is more important for high rice quality than rice straw return, and straw from both seasons is recommended for positive effects on soil fertility.