作物学报2011，Vol.37Issue(10)：1809-1818,10.DOI:10.3724/SP.J.1006.2011.01809
覆草对旱种直播稻产量与品质的影响
Effect of Non-flooded Straw-mulching Cultivation on Grain Yield and Quality of Direct-seeding Rice
摘要
Abstract
There are two problems in rice production in China: the one is the water shortage and another is labor shortage because of the climate change and economic development. Therefore, water-saving and labor-saving techniques should be developed. The direct-seeding is considered as a labor-saving while the non-flooded mulching cultivation as a water-saving practice. The aim of this study was to investigate if non-flooded straw mulching cultivation could maintain both grain yield and quality of direct-seeding rice. Two rice cultivars currently used in the production, Yangdao 6 (an indica) and Yangjing 4038 (ajaponica), were field grown using a direct-seeding method, and three treatments, non-flooded wheat-straw-mulching (SM), non-flooded and no mulching (NM), and traditional flooding and no mulching (control, TF), were imposed from 10 days after sowing to maturity. Compared with that under TF, grain yield showed some reduction under both SM and NM. The reduction in yield was 1.9-6.6% under SM, and 18.0-27.6% under NM. The difference in grain yield was not significant between SM and TF, and was significant between NM and TF. SM significantly improved head rice, gel consistency, albumin, glutelin and eating quality, and significantly reduced chalky kernels, chalkiness and prolamine content, and NM had the opposite effect. The results indicated that non-flooded wheat-straw-mulching could maintain a high grain yield and improved grain quality for direct-seeding rice. Greater leaf photosynthetic rate, root activity, and contents of indole-3-acetic acid and zeatin+zeatin riboside under such a practice contributed to a high grain yield and better quality, whereas NM significantly reduced these physiological parameters, and consequently reduced grain yield and quality.关键词
水稻/直播/覆草旱种/产量/品质/激素Key words
Rice/ Direct seeding/ Non-flooded wheat straw mulching/ Grain yield/ Grain quality/ Hormones引用本文复制引用
张自常,李鸿伟,王学明,袁莉民,王志琴,刘立军,杨建昌..覆草对旱种直播稻产量与品质的影响[J].作物学报,2011,37(10):1809-1818,10.基金项目
本研究由国家自然科学基金重大国际合作交流项目(31061140457),国家自然科学基金项目(31071360),江苏省基础研究计划项目(BK2009005),2011年中央级科研院所基本科研业务费专项基金项目(农业)(201103003)和教育部博士学科点基金项目(200811170002)资助. （31061140457）
