As good water condition in wet season, soil enzyme activity is more obviously than dry season.
湿季由于较好的水分条件，土壤酶活性较干季显著增加。
A field fertilizer experiment was made to explore the effect of different fertilizer treatments on soil nutrients and enzyme activity in different layers of river ancient channel.
通过田间肥料试验，探讨不同试验处理对河流故道区不同土层土壤养分及其酶活性的影响。
Soil enzyme activity varied obviously with duration of vegetable plantation and could be cited as a sensitive indicator of changes in soil quality.
不同利用年限菜地土壤酶活性变化幅度较大，能够更为敏感的指示土壤质量的变化。
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