【摘要】 研究滴灌棉田膜间覆盖不同高分子多孔隙无纺布对土壤水盐的影响，为指导盐碱地盐分调控和高分子材料的应用提供理论依据。本文通过在膜间覆盖高分子多孔隙聚酯纤维型（涤纶PET）、聚丙烯纤维型（兰丙纶PP）、聚乳酸纤维型（PLA）无纺布，分析不同处理对土壤水分、盐分和棉花产量的影响。研究结果表明：（1）与无覆盖措施相比，无纺布覆盖均能够减少地表蒸发，增加膜间土壤含水率，其中，覆盖60 d后，涤纶PET的保水效果最好，与CK相比，膜间土壤含水率增加34.95%;(2)利用无纺布进行地表覆盖后，能够不同程度地降低膜间土壤盐分及Na~+含量，以0～20 cm土层效果显著，各处理的脱盐效果依次为:PET>PP>PLA>CK，以涤纶PET脱盐率最高，为61.15%;(3)各处理以涤纶PET的棉花产量最高，为5 177.25 kg/hm~2，较CK高708.88 kg/hm~2,PLA的产量最低，为4 568.19 kg/hm~2。采用膜间覆盖高分子多孔隙无纺布减少了水分蒸发和盐分表聚，改善了作物生长的水盐环境，以涤纶PET的保水脱盐效果最好。更多还原

【Abstract】 The effects of different polymer materials covered with drip irrigation on cotton fields on soil water and salt were studied to provide a theoretical basis for guiding salt regulation in saline-alkali land and the application of polymer materials. This paper analyzes the effects of different treatments on soil moisture, salinity, and cotton by covering high-molecular multi-porous non-woven fabrics between membranes: polyester fiber(polyester PET), polypropylene fiber(blue polypropylene) and polylactic acid fiber(PLA). The research results show that:(1) Compared with non-covering measures, non-woven fabrics can reduce surface evaporation and increase soil moisture content between membranes, polyester PET has the best water retention effect after 60 days of coverage. The moisture content of the soil between the membranes increased by 34.95% compared with CK.(2) After using non-woven fabrics to cover the surface, the soil salt and Na~+ content in the soils between membranes can be reduced to varying degrees.The effect of 0-20 cm soil layers is significant. The desalination effect is as follows: PET>PP>PLA>CK, the highest PET desalination rate is 61.15%.(3) The yield of cotton treated with polyester PET is the highest at 5177.25kg/ha. The output of PLA is the lowest at 4568.19 kg/ha. The use of multi-porous non-woven fabrics covered between membranes reduces water evaporation and salt surface accumulation, improves the water and salt environment of crop growth, and the water retention and desalting effect of polyester PET is the best.更多还原