The regression equations between soil enzyme activities and chemical properties were obtained by using a stepwise regression method. 用土壤化學(xué)性質(zhì)對各種酶活性進(jìn)行逐步回歸分析，可以得到理想的方程。
The findings indicated that, to choose suitable plants and the disposition proportion in Cropland to Forest were more advantageous to the soil fertility enhancement. 摘要對青海大通縣北川河流域退耕還林地土壤化學(xué)性質(zhì)研究結果表明，退耕還林中選擇適宜的樹(shù)種及配置比例更有利于土壤肥力的提高。
