沼液沼渣资源化利用对土壤次生盐渍化的潜在影响

Abstract

通过对我省各地沼液沼渣进行取样检测，客观分析沼液沼渣中钠离子的含量，探讨沼液沼渣资源化利用对土壤盐渍化可能存在的影响。结果表明，沼渣中钠离子平均含量为0.113%，沼液中钠离子平均含量为0.016%，沼液沼渣资源化利用存在促进土壤次生盐渍化的潜在风险，依据测算结果，提出控制单位耕地面积沼液沼渣用量、从源头控制土壤中钠离子累积量的建议措施。 Through sampling and testing biogas slurry and biogas residues of Zhejiang province, we have analyzed objectively the sodium content of biogas slurry and biogas residues and explored the possible effects of resource utilization of them on soil salinization. The mean contents of sodium ion in biogas slurry and biogas residues were 0.113% and 0.016% respectively. It shows that the resource utilization of biogas slurry and biogas residues can be used to promote the poten-tial risk of secondary salinization of soil. According to the calculation results, the proposed measures of controling biogas slurry and biogas residues consumption in unit cultivated land area were proposed to control the amount of sodium ion accumulation in soil from the source control unit.