摘要
通过田间定位试验和土壤水分的测定,探讨了免耕和秸秆覆盖还田对小麦、油菜土壤水分利用效率的影响.研究表明,稻草覆盖还田对土壤有明显的抑蒸保墒作用,其效果主要发生在土壤表层(0～10 cm),稻草覆盖对小麦的保墒效果大于油菜的保墒效果.小春阶段与对照相比,免耕和秸秆覆盖还田土壤储水量增加13 560～33 360 m3·hm-2,麦油的水分生产效率提高了5.9 %～26.9 %.
Through fixed field experiment and determinations of soil moisture, the field water utilization efficiency of wheat and rape seeds was discussed under no tillage and straw mulching. The result indicated that the increasing effects of soil water content and the decreasing of water evaporation which caused by rice straw mulching were very apparent in the 0 - 10 cm surface layer of soil, and the effect of straw mulching in the wheat field was better than that of in the rape seeds field .As compared with ck, the soil water storage was increased by 13 560 - 33 360 m^3·hm^-2 under no tillage and straw mulching. The water utilization efficiency of wheat and rape seeds was improved by 5.9 %-26.9 %.
出处
《西南农业学报》
CSCD
2005年第5期565-568,共4页
Southwest China Journal of Agricultural Sciences
基金
国家粮食丰产工程资助(2004BA520A14C15)
四川省科技攻关计划(04NG020-015)资助
关键词
免耕
秸秆覆盖还田
土壤水库
水分利用效率
no tillage
straw mulching
soil reservoir
water utilization efficiency
