土壤磷酸酶活性及其与有机磷组分的相关性

Soil phosphatase activity and its correlation with composition of organic phosphorus

为探讨土壤磷有效性管理的措施,该文对北京八达岭地区9种林分类型下土壤的磷酸酶活性、有机磷组分以及二者之间的关系进行了系统研究。结果表明:土壤磷酸酶的类型以酸性磷酸酶为主。表层0～5cm土层的磷酸酶活性显著高于5～25cm和25～45cm土层的磷酸酶活性,且与土壤有机碳、氮有显著的相关性。土壤有机磷有明显的表聚性,在全磷中的比例为15.51%～17.48%。在土壤有机磷组分中,以中活性有机磷含量最高,其次为活性有机磷,而高稳性有机磷的含量最低。活性有机磷与中活性有机磷含量的相关性显著。磷酸酶活性与有机磷含量有密切的关系,无论是酸性磷酸酶还是碱性磷酸酶,都与活性有机磷、中活性有机磷、中稳性有机磷以及土壤有效磷含量有极显著的相关性。增加土壤有机质,诱导磷酸酶的产生,是提高土壤有效磷含量的途径。

Soil phosphatase activity,composition of organic phosphorus and their relationship in nine different forest types were studied to explore measures of soil phosphorus availability management in Badaling mountains,Beijing.Results show that soil acid phosphatase is predominant.Phosphatase activity in 0--5 cm soil horizon is obviously higher than that in 5--25 cm and 25--45 cm.The correlation of phosphatase activity and soil organic carbon,nitrogen is significant.Content of soil organic phosphorus in 0--5 cm soil horizon is obviously rich.The rate of soil organic phosphorus is from 15.51% to 17.48% in total phosphorus.In the composition of organic phosphorus,the content of moderate labile organic phosphorus is the highest,followed by the labile organic phosphorus,and resistant organic phosphorus is the lowest.The labile organic phosphorus is significantly related to the moderate labile organic phosphorus.The activity of acid and alkaline phosphatase is closely related to the contents of labile organic phosphorus,moderate labile organic phosphorus,moderate resistant organic phosphorus and available phosphorus.Inducing phosphatase by enriching soil organic matters may increase the content of soil available phosphorus.