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本文以等有机质量的猪粪、沼渣为基肥,而追肥(化肥与沼液)以等NPK量进行施用,采用二裂式区组设计的方法研究了沼气肥、猪粪、化肥等不同施肥组合对保护地土壤硝酸盐及盐分积累的影响。结果表明:在番茄收获期,各处理0~20 cm土层土壤全盐含量在0.92g kg-1~1.65g kg-1之间;各处理土壤可溶性盐分组成中,阳离子以Ca2+、Mg2+为主,阴离子以SO42-、HCO3-、Cl-、NO3-为主。施肥提高了土壤硝态N的含量。施用沼渣比施用猪粪土壤硝酸盐含量高,但施用沼渣与施用猪粪对土壤全盐量的影响差异不显著;而施用沼液较施用化肥使土壤硝态N及全盐量提高。
In this paper, pig manure and biogas residue with the same organic quality as the basal fertilizer, and topdressing fertilizer (fertilizers and biogas slurry) were applied at equal NPK. The biogas fertilizer, pig manure and chemical fertilizers Effects of Combination on Nitrate and Salt Accumulation in Soil of Protected Field. The results showed that the soil total salt content of 0-20 cm soil layer was between 0.92g kg-1 and 1.65g kg-1 at the harvest stage of tomato. The contents of soluble salts in the soils were Ca2 + and Mg2 + , Anions to SO42-, HCO3-, Cl-, NO3- based. Fertilization increased soil nitrate N content. The biogas residue had a higher nitrate content than the pig manure applied, but no significant difference was found between the biogas residue and the pig manure applied to the soil. However, the application of biogas slurry increased the nitrate N and total salinity of the soil.