长期定位施肥对无石灰性潮土酶活性的影响

试验研究长期定位施肥对无石灰性潮土酶活性的影响结果表明,长期单施有机肥及其配施无机化肥均能显著增强土壤脲酶、蛋白酶、磷酸酶和蔗糖酶的活性。土壤脲酶活性、蛋白酶活性与土壤有机质、全N、碱解氮含量呈极显著正相关,磷酸酶活性与土壤有机质、有机磷、有效磷呈极显著正相关,蔗糖酶活性与土壤有机质呈极显著正相关。表明土壤酶活性与土壤肥力密切相关,可作为评价土壤肥力性状的生物学指标。

Effects of a long-term located fertilization on enzyme activity of the non-calcareous fluro-aquic soil

The experiment was conducted in the 26-year experiment in fixed plot of non-calcareous fluro-aquic soil in 2002 and 2003.The soil enzyme activities were measured.The results indicate that the activity of soil urease enzyme,protease enzyme,phosphatase enzyme and surase enzyme can be boosted by the application of organic fertilizer alone and the combined application of organic and inorganic fertilizers for a long term.The results of correlation analysis show that the activity of soil urease enzyme and protease enzyme are significantly positively related to soil organic matter,total nitrogen,alkali-hydrolysis N;phosphatase enzyme is significantly positively related to soil organic matter,organic phosphorous,available phosphorous;surase enzyme is significantly positively related to soil organic matter.It is indicated that there is a close relationship between the soil fertilization and the above indexes,so they can be used as the biology index of soil fertility properties and quality.