沟谷地玉米垄作覆膜效应研究

1996～ 1997年在山西省隰县的黄土高原沟谷地进行了旱地玉米 5种垄作覆膜方式的比较研究。结果表明 ,秋耕起垄地膜顶凌覆盖效果最明显 ,与秋耕地膜播时覆盖 (CK)相比 ,播前 0～2 0 0cm土体贮水量增加 56 .35mm ,玉米生育期集水率为 53.0 % ,土壤温度平稳适中 ,改善了土壤环境 ,促进了玉米生长发育 ,使玉米产量增加了 37.12 % ,水分利用率提高了 1.93kg/mm。

Effects of Mound-planting and Film-mulching on Rainfed Corn

Five mound planting and film mulching cultivation techniques were compared in the gully region on the loess plateau at Xixian,Shanxi Province in 1996 and 1997.Results showed that the best one was that the soil was ploughed and mounds were made in autumn,plastic film was mulched during the thawing time in spring.Compared with the control (in which the soil was ploughed and plastic film was mulched in autumn),water storage amount was increased by 56.35 mm for 0～200cm soil,water pooling rate reached up to 53.0% during the growing season,the temperature was stable and moderate,the conditions in the soil were therefore improved,which helped to improve the growth and development of the crop.The yield was increased by 37.12%,and water use efficiency increased by 1.93kg/mm.