摘要
采取小区试验同大区开发相结合的方法，采用一年二作制，探讨冬小麦—夏玉米现行轮作体系下麦秸立茬覆盖一玉米免耕播种—化控—苗期深松节水雨养模式。该耕作模式能减少土壤水分蒸发 ３～３．４个百分点，节省抗旱用水５０ ％左右，多蓄积自然降水 １００～１５０ ｍｍ，犁底层及其以下层次的土壤容重明显降低、孔隙度相应增加、氧化还原电位相应提高，水稳性团粒结构明显增加，盐碱土地区具有明显的促进脱盐的作用，夏玉米一般提前成熟７ｄ左右，增产幅度一般为１０％～３０％。
By the combination of plot test and field development,and the system of two crops per year,wa- ter-saving and rain culture mode is discussed. The mode is covering with vertical remaining wheat stalk-corn seed sowing of no-tillage-chemical control-deep ploughing in seedling stage under present rotation cropping system of winter wheat-summer corn. This ploughing mode can reduce evaporation of soil by 3 %-3. 4% water and save about 50 % irrigating water,and can store 100-150 mm of natural rain. Soil volume weight of plough pan and below dropped significantly. Correspondingly, porosity and redox potential rats ed. And, water-stable crumb structure raised remarkably. It had obvious role of promoting desalting in saline alkali soil zone. Summer corn matures 7 d earlier and yield raises 10 %-30 % generally.
出处
《天津农学院学报》
CAS
1998年第2期20-24,共5页
Journal of Tianjin Agricultural University
基金
天津市自然科学基金项目
关键词
免耕
覆盖
深松
化控
节水雨养农业
No-tillage
Cover
Deep ploughing
Chemical control
Water-saving and rain culture agriculture
