重盐碱地膜下滴灌土壤盐分运移规律研究

Salinity Migration Rule under Mulching Plastic Drip Irrigation in Heavy Salty Soil

根据对重盐碱地进行滴灌种植打瓜试验,钻孔取土,测定土壤总盐含量进行分析,试验表明在重盐碱地上利用膜下滴灌进行种植,滴头下的盐分淡化区稍向棵间偏移,并主要集中在二膜中间,可以为作物提供较好的水盐环境;经过1年膜下滴灌种植打瓜后,40 cm深度土壤总盐含量下降57%,100 cm深度总盐下降30.8%。

The drip irrigation under the mulch film has been being promoted for ten years in the army corps of Xinjiang.And it also has made a significant success that planting the crops in the uncultivated land full of salt with the technology of drip irrigation under the mulch film.According to the experiment of planting the edible seeds in the land,filled with heavy stalinization,with drip irrigation in 2000,this article is carried on an analysis on the content of total salt in the soil by drilling hole and the determination of the amount of salt.It indicates that the area of salinity desalination under the water dropper offsets direction to the space between crops slightly,and concentrates in the place between two mulch films mainly,which provides the crops with better environment of water and salt,the content of total salt in the unit soil,in the depth of 40 cm,decreases by 57%,and the total salt drops by 30.8% in the depth of 100 cm after a year of planting with drip irrigation under mulch film.