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本文在几年试验研究分析的基础上,对大豆连作不同年限不同生育期中脲酶、酸性磷酸酶、过氧化氢酶、转化酶的酶活性与土壤肥力因素之间的相关性进行了研究.分析结果表明,4种酶的酶活性与有机碳、土壤pH值以及4种酶活性之间都存在着显著的正相关.脲酶活性与速效钾呈显著的正相关;与速效磷呈负相关.酸性磷酸酶活性与速效钾呈正相关.过氧化氢酶活性与水解氮呈显著的正相关,与速效钾呈正相关,与速效磷呈显著的负相关.从大豆连作土壤中4种酶活性与土壤肥力因素之间的相关性分析可以看出,土壤的农化性状影响着土壤酶活性的高低,而土壤酶活性的变化也影响着土壤有效肥力的高低,它们之间的关系是相互影响、相互制约的.由此可见,用土壤酶活性来表征土壤生物学活性和土壤有效肥力状况,并根据酶活性评价土壤肥力水平指标是可行的.
Based on a few years of experimental research and analysis, the correlation between enzyme activities and soil fertility factors of urease, acid phosphatase, catalase and invertase in different growth stages of soybean continuous cropping was studied. The results showed that there was a significant positive correlation between the activities of four enzymes and organic carbon, soil pH and four kinds of enzyme activities.The urease activity had a significant positive correlation with available potassium, negatively correlated with available phosphorus, There was a positive correlation between enzyme activity and available potassium.Catalase activity was positively correlated with hydrolytic nitrogen, positively correlated with available potassium and negatively correlated with available phosphorus.From the data of four enzyme activities and soil fertility factors We can see that the agronomic characters of soil affect the activity of soil enzymes, and the changes of soil enzyme activities also affect the level of soil available fertility, the relationship between them is mutual influence and mutual restraint It can be seen that it is feasible to characterize soil biological activity and soil available fertility by soil enzyme activity and evaluate soil fertility index according to enzyme activity.