长期定位施肥土壤酶活性及其肥力变化研究

Study on the enzyme activities and fertility change of soils by a long -term located utilization of different fertilizers.

对小麦 玉米轮作区长期定位施肥土壤酶活性及其肥力变化的研究结果表明 ,与未施肥 (对照 )相比 ,长期施肥处理土壤脲酶、碱性磷酸酶、转化酶和过氧化氢酶活性均明显提高 ,其中有机肥 (秸秆、厩肥 )配施化肥效果明显优于单施化肥 ;施肥后休闲处理未提高土壤酶活性 ,表明施肥 (化肥、有机肥 )后作物根系及其分泌物具有刺激土壤酶活性的作用 ,且土壤酶活性高低与作物产量 (即土壤肥力 )相关性显著。

The studies on the enzyme activities and fertility change of soils by a long-te rm located utilization of different fertilizers in wheat-maize rotation district show that the activities of unease,alkaline phosphatase,invertase and hydrogen peroxidase soils can be increased by a long-term fertilization,and th e effect of inorganic fertilizer combined with organic manure is better than that of only inorganic fertilizer,and the activity of soil enzyme can not be increa se d in fallow field after fertilization,showing that fertilization(inorganic and o rganic fertilizer)and crop rhizctaxis both can increase the activity of soil enz yme,and the activity of soil enzyme are positively correlated with crop yield (s oil fertility).