黄河三角洲撂荒地土壤氧化还原酶活性与化学性质通径分析

为正确评价典型盐碱土壤化学性质对土壤氧化还原酶活性的影响, 运用通径分析法研究了黄河三角洲撂荒地土壤氧化还原酶活性与土壤化学性质的关系.结果表明, 土壤氧化还原酶活性关于土壤化学性质的标准化多元线性回归方程分别可以解释84.63%的过氧化氢酶活性变化和88.03%的过氧化物酶活性变化, 剩余通径系数分别为0.392 0和0.346 0.速效钾和有机质对过氧化氢酶活性有显著积极影响, 速效钾对过氧化物酶活性有显著积极影响, 全氮对过氧化物酶活性有显著消极影响.

Path analysis between dehydrogenase activity and chemical property of wasteland in Yellow River Delta

The relation between dehydrogenase activity and soil chemical property was determined through path analysis of wasteland in Yellow River Delta in order to evaluate the influence of soil chemical property on dehydrogenase activity. The results show that standard multiple regression equation with a set of independent variables (chemical properties) can explain 84.63% of catalase activity variance and 88.03% of peroxidase activity variance, with 0.392 0 and 0.346 0 of the residual path coefficients respectively. Available K and organic matter have strong positive effect on catalase activity. Available K has significant positive effect on peroxidase activity, while the effect of total N is negative.