本文選題：木霉 + 濱海鹽漬土��； 參考：《中國生態(tài)農(nóng)業(yè)學(xué)報(bào)》2016年01期

【摘要】：生物改良濱海鹽漬土是一種投資少、需時短、見效快、長期受益的環(huán)保生態(tài)型技術(shù)。通過田間試驗(yàn)將木霉制劑[活性成分為木霉分生孢子,1×107(CFU)·g~(-1)]施用到濱海中度鹽漬土臺田(含鹽量2.99 g·kg~(-1),砂壤土),對土壤改良臺田試驗(yàn)區(qū)不同處理(施用木霉制劑和常規(guī)對照處理)及輔助試驗(yàn)區(qū)日光溫室(含鹽量0.98 g·kg~(-1),壤土)、濱海輕度鹽漬土開墾田(含鹽量1.75 g·kg-1,輕壤土)、濱海重度鹽漬土河灘地(含鹽量26.19 g·kg~(-1),砂壤土)的耕層土壤取樣室內(nèi)測定,探究木霉在濱海中度鹽漬土臺田施用的生態(tài)效應(yīng)。濱海中度鹽漬土臺田木霉處理與對照處理相比,土壤緊實(shí)度提高177.04%,土壤水穩(wěn)性團(tuán)聚體數(shù)量(≥0.25 mm)提高265.78%,土壤含水率提高320.83%,土壤堿解氮、有效磷、速效鉀和有機(jī)質(zhì)含量分別提高96.14%、42.17%、105.65%和63.79%;土壤稀釋法培養(yǎng)微生物,細(xì)菌、放線菌、真菌、固氮菌數(shù)量比對照分別提高170.95%、82.68%、152.17%和471.93%。濱海中度鹽漬土臺田木霉處理與濱海重度鹽漬土河灘地比較,有利于植物生長的指標(biāo)土壤緊實(shí)度、水穩(wěn)性團(tuán)聚體、有機(jī)質(zhì)和微生物群落數(shù)量分別提高1.53倍、2.11倍、3.20倍和28.33倍,不利植物生長的水溶性鹽下降96.60%;濱海中度鹽漬土臺田通過木霉制劑改良,土壤緊實(shí)度、總孔隙度、含水率、有效磷、有機(jī)質(zhì)和微生物數(shù)量與濱海輕度鹽漬土開墾田相比無顯著差異;濱海中度鹽漬土臺田木霉處理后土壤容重降低、總孔隙度增加,與高產(chǎn)日光溫室非鹽漬化土壤相比接近。濱海重度鹽漬土通過沙土抬高1.2 m筑田變?yōu)橹卸塞}漬土,降鹽效果較好,再通過加入生物改良措施提高土壤營養(yǎng)和有益微生物,優(yōu)化土壤團(tuán)粒結(jié)構(gòu),利于提高濱海中度鹽漬土臺田改良效率和質(zhì)量,促進(jìn)濱海中度鹽漬土臺田生態(tài)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，

本文編號：2055355