干旱地区农业研究2009，Vol.27Issue(6)：123-128,6.
秸秆覆盖农田的小气候特征和增产机理研究
Study on microclimate characters and yield-increasing mechanism in straw mulching field
摘要
Abstract
Taking use of experimental data from 2000 ～ 2002 and demonstration & popularization information from 2002 ～ 2003, the paper analyzed the microclimate feature and its yield-promoting mechanism under straw mulching. The results showed that: straw mulching had dramatic effects on temperature of field's surface layer, air humidity and soil temperature, but wind speed. Straw mulching increased surface sensible heat flux, but decreased latent heat flux and soil heat flux, so the soil evaporation was restricted. As soil surface evaporation was restricted by covering, the ineffective consumption of soil water was decreased, and accumulation was increased accordingly. This was helpful for plant transpi-ration in later stage, and for water consumption transforming from physical process to physiological process, and from in-valid consumption to availability. So straw mulching could increase yield and advance water use efficiency. For winter wheat, straw mulching enabled yield increasing and water use efficiency by 8.08% ～ 10.71% and 3.5%～8.4% re-spectively, and for summer maize, it promoted yield and water use by 6.08% ～ 11.97% and 7.8% ～ 14.4% respec-tively.关键词
秸秆覆盖/冬小麦/夏玉米/小气候特征/增产机理Key words
straw mulching/winter wheat/summer maize/microclimate characters/yield-increasing mechanism分类
农业科技引用本文复制引用
方文松,朱自玺,刘荣花,马志红,师丽魁..秸秆覆盖农田的小气候特征和增产机理研究[J].干旱地区农业研究,2009,27(6):123-128,6.基金项目
科技部农业科技成果转化资金项目(05EFN217400415,2006GB24160426) （05EFN217400415,2006GB24160426）
