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本文对陇东黄绵土牧草和麦地酶活性做了4年连续研究。结果表明,酶的土层垂直分布除多酚氧化酶外,其他酶活性都随土层加深而递减,差异显著。过氧化氢酶、转化酶、多酚氧化酶、蛋白酶活性是随作物生长年限而上升,草地尿酶活性逐年下降,其他酶活性变化不一致。水热是影响裸地酶活性的主要因子,夏季酶活性高,春秋季低;苜蓿地植物代谢在酶活性季节变化中起着主导作用,夏季酶活性较低,春秋季最高;红豆草和麦地部分酶变化同裸地,其他酶同苜蓿地。总之,过氧化氢酶、转化酶、脱氢酶、尿酶和蛋白酶是麦地高于草地,多酚氧化酶和磷酸酶活性是草地高于麦地。表明多年生豆科牧草较小麦更能丰富土壤C、N营养和提高土壤肥力。
In this paper, Longdong loessial soil pasture and wheat enzyme activity to do a 4-year continuous study. The results showed that in addition to the polyphenol oxidase, the vertical distribution of soil enzyme activity of other enzymes decreased with the deepening of the soil layer, the difference was significant. Catalase, invertase, polyphenol oxidase, protease activity increased with the growth of crop years, grassland urease activity decreased year by year, the other changes in enzyme activity inconsistent. Hydrothermal activity was the main factor that affected the enzyme activity in bare land. The enzyme activity was high in summer and low in spring and autumn. The plant metabolism in alfalfa played a leading role in the seasonal change of enzyme activity, but lower in summer and highest in spring and autumn. Part of the enzyme changes in the same bare areas, other enzymes with alfalfa. In conclusion, catalase, invertase, dehydrogenase, urease and protease were higher in the meadow than in the meadow, and polyphenol oxidase and phosphatase activities were higher in the meadow than in the meadow. The results showed that the perennial leguminous forages were better able to enrich soil C, N nutrition and improve soil fertility than wheat.