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4种填闲作物对天津黄瓜温室土壤次生盐渍化改良作用的初步研究

Keywords: 土壤次生盐渍化,填闲作物,毛苕子,苏丹草,甜玉米,苋菜

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Abstract:

通过夏季填闲的方式来解决设施农业次生盐渍化在20世纪初就已被提出,但相关研究在天津黄瓜温室土壤次生盐渍化改良方面还没有开展。通过盆栽试验研究了4种填闲作物(毛苕子、苏丹草、甜玉米和苋菜)对天津地区黄瓜温室土壤次生盐渍化的改良作用。结果显示,与对照土壤相比,4种填闲作物均能显著降低土壤可溶性盐分和Na+的含量(P<0.05),显著降低土壤养分和有机质的含量(P<0.05);毛苕子、甜玉米和苋菜能显著增大土壤K+/Na+的比值;高种植密度对次生盐渍化土壤的改良效果更为突出;4种填闲作物相比,毛苕子对黄瓜温室土壤次生盐渍化的改良效果最佳。既为改良天津黄瓜温室土壤次生盐渍化提供实践参考,也为延长设施土壤使用年限,促进天津设施蔬菜产业发展提供一种可行途径。

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