论文部分内容阅读
对辽宁省主要地区不同肥力典型棕壤及其微团聚体中４种主要酶活性进行测定与统计分析，试验结果表明，高肥力棕壤脲酶、中性磷酸酶、蔗糖酶和多酚氧化酶活性分别为１０７３±４０４ＮＨ３－Ｎμｇ·ｇ－１土、２２３２．７±６３３．１酚μｇ－１土·２４ｈ、１３．０９±５．８３葡萄糖ｍｐ· ｇ－１土，２４ｈ和６２５．２酚μｇ·ｇ－１土０．５ｈ，显著高于低肥力棕壤相应的酶活性。在各粒级微团聚体中，＜１０μｍ微团聚体的４种酶活性最高，５０～２５０μｍ微团聚体中的酶活性最低，并且＜１０μｍ微团聚体中酶活性在高低不同肥力土壤之间差异最为显著。
The results showed that the activities of urease, neutral phosphatase, sucrase and polyphenol oxidase in brown soil with high fertility were measured and statistically analyzed. Respectively, 1073 ± 404NH3-Nμg · g-1 soil, 2232.7 ± 633.1 phenol μg-1 soil · 24h, 13.09 ± 5.83 glucose mp · g-1 soil, 24h and 625.2 phenol μg · G-1 soil 0.5h, significantly higher than low-fat brown soil corresponding enzyme activity. Among the microaggregates of various size fractions, <10μm microaggregates had the highest activity of the four enzymes and the lowest ones of the 50-250μm microaggregates, and enzyme activities of <10μm microaggregates differed among different fertile soils The most significant.