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5 cm，覆秸秆3 000 kg/hm2的增产率最小。覆盖处理对0～20 cm土层的盐分均有很好的脱盐效果，可减弱休闲季土壤 0～40 cm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 straws on soil salt inhibition and desalination as well as corn yield increase in newly saline soil. The results shows that corn yield significantly 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 increasing rate of crop straws mulching with the cover measures 3 000 kg/hm2 is the least. All ground covers treatments produced a good desalting effect in 0～20 cm soil layer， and could weak desalinization of leisure season in 0～40 cm soil layer . The water contents in every soil layer are positively correlated with the mulch amounts of straws and fine sand .

S156.41

甘肃省农业科学院科技创新专项(2011GAAS06-17)；国家科技支撑计划项目(2012BAD05B03)部分内容