玉米秸秆对设施次生盐渍化土壤微环境及番茄生长的影响

Effects of Corn Stalks on Microenvironment of Facility Secondary Salinized Soil and Tomato Growth

采用盆栽试验方式,研究玉米秸秆对次生盐渍化土壤微生物、土壤理化性状及番茄生长的影响。结果表明:添加玉米秸秆丰富了盐渍化土壤中微生物数量,盐渍化土壤微生物群落中细菌有效序列数量增多,菌群结构趋于丰富化,主要影响的菌群为肠杆菌科(Enterobacteriaceae)、鞘脂单胞菌科(Sphingomonadaceae)和黄单胞菌科(Xanthomonadaceae)。添加玉米秸秆可以改善盐渍化土壤的团聚体结构,显著提高土壤有机质含量;同时加快了设施土壤中矿质元素的释放,碱解氮、速效钾、速效磷含量均降低。添加玉米秸秆处理的番茄株高、茎粗、光合指标均明显高于对照,产量也显著增加。

This paper conducted pot experiment and studied the effects of corn stalks on microenvironment,chemical and physical properties of the secondary salinized soil,and growth of tomato. The results showed that adding corn stalks could enrich the microbial population in salinized soil.The number of effective bacterial sequences in the soil microbial community was increased,and flora structure became more abundant.The main effective flora were Enterobacteriaceae,Sphingomonadaceae,and Xanthomonadaceae.Adding corn stalks could improve the aggregate structure of salinized soil,significantly increase soil organic matter content,accelerate the release of mineral elements in soil facility,and reduce the contents of alkali nitrogen,available potassium and available phosphorus in soil.With the treatment of adding corn stalks,tomato plant height,stem diameter and photosynthetic index were significantly higher than that of the contrast.And the tomato yield was also remarkably increased.