發(fā)布時(shí)間：2019-07-23 08:01

【摘要】：為給濱海鹽土快速脫鹽改造提供參考依據(jù),以工農(nóng)業(yè)廢棄物秸稈、牛糞、脫硫石膏、醋渣為調(diào)控材料,研究不同組合下濱海鹽土快速脫鹽效果。結(jié)果表明,4種組合與對照相比,均可顯著降低土壤容重,提高土壤孔隙度,增加土壤滲透性,其中T4(牛糞+醋渣)綜合效果最好,與對照相比,土壤容重降低37.93%,土壤孔隙度提高12.37個(gè)百分點(diǎn);各處理0~60 cm土層平均含鹽量高低順序?yàn)門1(秸稈+脫硫石膏)CK(對照)T2(牛糞+脫硫石膏)T3(秸稈+醋渣)T4(牛糞+醋渣),T1、T2、T3、T4與CK相比分別降低-123.9%,2.23%,30.45%,39.77%;各處理p H值與CK相比均顯著下降,由高到低的順序?yàn)镃KT3T4T2T1,T1、T2、T3、T4與CK相比分別降低0.71,0.50,0.35,0.39個(gè)單位;各處理土壤CO_3~(2-)、HCO_3~-含量均明顯下降,脫硫石膏處理還能增加土壤SO_4~(2-)、Ca~(2+)、Mg~(2+)含量。綜上所述,在改善土壤物理結(jié)構(gòu)、降低土壤鹽分方面,牛糞效果明顯好于秸稈,醋渣明顯好于脫硫石膏;在抑制土壤脫鹽堿化方面,脫硫石膏明顯好于醋渣,但脫硫石膏容易增加土體總體含鹽量。因此,推薦濱海鹽土低成本快速脫鹽方式為"牛糞+醋渣"。
[Abstract]:In order to provide a reference for the rapid desalination transformation of coastal saline soil, the rapid desalination effect of coastal saline soil under different combinations was studied by using industrial and agricultural waste straw, cow dung, desulphurization gypsum and vinegar slag as control materials. The results showed that compared with the control, the four combinations could significantly reduce soil bulk density, increase soil porosity and increase soil permeability, among which T _ 4 (cow dung vinegar residue) had the best comprehensive effect. Compared with the control, soil bulk density decreased by 37.93% and soil porosity increased by 12.37%. The order of average salt content in 0 鈮，

本文編號：2518018