地面覆盖方式对新垦盐碱地的抑盐和增产效果研究

Effects of Different Ground Covers on Soil Salt Inhibition and Corn Yield Increasing in Newly Saline Land

采用塑料地膜、细沙、秸秆3种覆盖材料，研究了不同地面覆盖方式对新垦盐碱荒地的抑盐、脱盐和玉米的增产效果。结果表明，不同覆盖材料和方式均有显著的增产作用，其中全膜覆盖效果最好，其次是覆细沙5cm，覆秸秆3000kg/hm2。的增产率最小。覆盖处理对O～20cm土层的盐分均有很好的脱盐效果，可减弱休闲季土壤0-40cm土层的返盐。秸秆覆盖和细沙覆盖各层的含水量与覆盖量正相关。

A field experiment is carried out to study the effects of ground covering plastic films, fine sands and crop strawson soil salt inhibition and desalination as well as corn yield increase in newly saline soil. The results shows that corn yieldsignificantly increased by using either different covering materials or patterns. Under the covers of different materials and patterns,the corn yield of whole plastic film mulching increased best, followed by that of 5 cm fine sand mulching, and while yield increasingrate of crop straws mulching with the cover measures 3 000 kg/hm2 is the least. All ground covers treatments produced a gooddesahing effect in 0-20 cm soil layer, and could weak desalinization of leisure season in 0-40 cm soil layer. The water contents inevery soil layer are positively correlated with the mulch amounts of straws and fine sand.