果—草人工生态系统中土壤微生物、土壤酶与土壤养分的关系

Relationship Between Biological Factors and Soil Nutrients in Artificial Fruit-Grass Ecosystem

试验研究了果—草人工生态系统中土壤生物因子与土壤养分的关系。结果表明:除全P与纤维分解菌、纤维分解酶、多酚氧化酶为负相关外,其余养分与生物因子间均呈正相关,且多数养分与生物因子呈显著或极显著相关;经通径分析发现,脲酶、硅酸盐细菌、纤维分解酶是促进有机质积存的主要生物因素,蔗糖酶是影响N、P、K速效养分的最主要因子,过氧化氢酶、多酚氧化酶、纤维分解菌只是选择性地对有机质的积存和N、P、K速效养分的形成起作用。

A experiment was done to study the relation between biological factors and nutrients in soil in an artificial fruit-grass ecosystem. The result showed, except total P was negatively correlated with cellulose-decomposing bacterium,cellulolytic enzyme,polyphenol oxidase, the other nutrients were positively correlated with all biological factors, in addition, most of the nutrients were significantly or extremely significantly correlated with biological factors. After the pathway analysis was done between soil nutrients and biological factors, the conclusion was reached, the urease,silicate bacterium,cellulolytic enzyme werethe main biological factors of deposit of organic matter; invertase was the most important factor affecting the rapidly available nutrients of N, P, K; the catalase, polyphenol oxidase, cellulose-decomposing bacterium selectively affected the deposit of organic matter and the forming of the rapidly available nutrients of N, P, K.