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黑土是保证我国粮食安全的最重要的土壤资源之一,主要分布在我国的东北地区。为了调查我国黑土区土壤理化性状、土壤酶活性及两者间相互关系,我们从黑土区不同纬度农田采集了26个土壤样品,分析其土壤酶活性与微生物量碳(SMBC)及其它土壤理化性状的关系。结果发现,黑龙江北安黑土土壤全碳、全氮、全磷、碱解氮、SMBC、过氧化氢酶、脲酶及转化酶活性最大;简单相关分析发现,过氧化氢酶、脲酶、磷酸酶及转化酶均与土壤全氮、全碳及SMBC呈极显著正相关;通径分析表明,全氮是影响该土壤区土壤酶活性的主导因子,pH值是通过直接作用或间接作用影响过氧化氢酶活性的另一主导理化因子,全氮是脲酶活性的主导因子,碱解氮、全碳、全氮是磷酸酶活性的主导因子,全氮和pH值是影响转化酶的两大主导理化因子。
Black soil is one of the most important soil resources for ensuring food security in our country, and is mainly distributed in the northeast of China. In order to investigate the soil physical and chemical properties, soil enzyme activities and the correlation between them in the black soil area of China, we collected 26 soil samples from different latitudes farmland in the black soil area to analyze their soil enzyme activities and SMBC and other soil physical and chemical properties Relationship. The results showed that the activities of total carbon, total nitrogen, total phosphorus, available nitrogen, SMBC, catalase, urease and invertase in black soil were the highest in Bei’an, Heilongjiang Province. Simple correlation analysis showed that catalase, urease, There was a significant positive correlation between invertase and soil total nitrogen, total carbon and SMBC. Path analysis showed that total nitrogen was the dominant factor influencing soil enzyme activity in this soil. PH value affected hydrogen peroxide through direct action or indirect action Total nitrogen was the dominant factor in urease activity. Nitrogen, total carbon and total nitrogen were the main factors affecting the activity of phosphatase. Total nitrogen and pH were the two main factors affecting invertase .