高原地区不同农作物土壤酶活性与土壤养分关系研究

The Feature of Soil Enzyme Activities With Different Crops and Soil Nutrient in the Plateau Region

以不同农作物土壤为研究对象,采用野外采样及室内化学分析方法,研究了高海拔地区主要农作物小麦、青稞、油菜以及玉米土壤中过氧化氢酶、蔗糖酶和脲酶的酶活性值以及垂直分布规律,并对其酶活性与土壤养分进行了相关分析。结果表明:4种农作物土壤酶活性随土层增加而降低,其中玉米脲酶活性值偏高,表明其土壤氮素代谢能力较高,土壤养分指标和土壤酶活性呈正相关性,且过氧化氢酶和脲酶活性与土壤有机质含量呈极显著正相关。

Taking soil which growing different crops analysis, the catalase, urease, sucrase activities and the in as material, using the method of field sampling and chemical vertical distribution of these soil enzyme activities in wheat,barley, cole and corn at high altitude were studied,the correlation of the three soil enzyme activities and the soil physical and chemical properties were analyzed. The results showed that.the soil enzyme activities of four kinds of corps decreased with the soil depth increasing,and soil urease activities in the corn were the highest,it showed that metabolic capacity of soil nitrogen was higher. Indicators of soil nutrient and soil enzyme activities in the study were positively correlated, the activity of the catalase and urease and soil organic matter content was significantly positively correlated.