This study dealt with the effects of maize, beet and soybean stubble remaining in field on soil enzyme activities, under the different temperature, moisture and nitrogen content.

• 摘要将玉米、大豆、甜菜三种作物根茬分别加入土壤中，在不同温、湿度条件和不同氮素水平下培养后，研究其对不同土壤酶的影响。