木霉制剂改良滨海盐渍土台田生态效应

发布时间：2018-06-23 02:33

  本文选题：木霉 + 滨海盐渍土　； 参考：《中国生态农业学报》2016年01期

【摘要】：生物改良滨海盐渍土是一种投资少、需时短、见效快、长期受益的环保生态型技术。通过田间试验将木霉制剂[活性成分为木霉分生孢子,1×107(CFU)·g~(-1)]施用到滨海中度盐渍土台田(含盐量2.99 g·kg~(-1),砂壤土),对土壤改良台田试验区不同处理(施用木霉制剂和常规对照处理)及辅助试验区日光温室(含盐量0.98 g·kg~(-1),壤土)、滨海轻度盐渍土开垦田(含盐量1.75 g·kg-1,轻壤土)、滨海重度盐渍土河滩地(含盐量26.19 g·kg~(-1),砂壤土)的耕层土壤取样室内测定,探究木霉在滨海中度盐渍土台田施用的生态效应。滨海中度盐渍土台田木霉处理与对照处理相比,土壤紧实度提高177.04%,土壤水稳性团聚体数量(≥0.25 mm)提高265.78%,土壤含水率提高320.83%,土壤碱解氮、有效磷、速效钾和有机质含量分别提高96.14%、42.17%、105.65%和63.79%;土壤稀释法培养微生物,细菌、放线菌、真菌、固氮菌数量比对照分别提高170.95%、82.68%、152.17%和471.93%。滨海中度盐渍土台田木霉处理与滨海重度盐渍土河滩地比较,有利于植物生长的指标土壤紧实度、水稳性团聚体、有机质和微生物群落数量分别提高1.53倍、2.11倍、3.20倍和28.33倍,不利植物生长的水溶性盐下降96.60%;滨海中度盐渍土台田通过木霉制剂改良,土壤紧实度、总孔隙度、含水率、有效磷、有机质和微生物数量与滨海轻度盐渍土开垦田相比无显著差异;滨海中度盐渍土台田木霉处理后土壤容重降低、总孔隙度增加,与高产日光温室非盐渍化土壤相比接近。滨海重度盐渍土通过沙土抬高1.2 m筑田变为中度盐渍土,降盐效果较好,再通过加入生物改良措施提高土壤营养和有益微生物,优化土壤团粒结构,利于提高滨海中度盐渍土台田改良效率和质量,促进滨海中度盐渍土台田生态的改善。
[Abstract]:Biological improvement of coastal saline soil is a kind of environmental protection ecological technology with less investment, short time, quick effect and long term benefit. Through field experiment, Trichoderma preparation [active ingredient 1 脳 107 (CFU) g-1] was applied to littoral medium saline soil terrace (salt content 2.99 g kg ~ (-1), sandy loam). Different treatments (application of Trichoderma preparation and conventional soil) were carried out in the experimental area of soil improvement. Soil samples were collected in greenhouse (0.98 g kg ~ (-1), loam), reclamation field (1.75 g 路kg ~ (-1), light loam) in littoral light saline soil, and in seashore heavy saline soil (26.19 g kg ~ (-1), sandy loam soil) in the auxiliary test area, and the results showed that the soil content was 0.98 g kg ~ (-1), 0.98 g kg ~ (-1), loam soil in the auxiliary test area, 1.75 g 路kg ~ (-1) in littoral saline soil, and 26.19 g kg ~ (-1) in sandy loam. To explore the ecological effect of Trichoderma on the littoral medium saline soil. Compared with the control treatment, the soil compactness, the number of soil water stable aggregates (鈮，

本文编号：2055355