The results showed that maize or beet stubble remaining in field could raise the activities of catalase, but which was decrease in soybean stubble remaining in field;

• 结果表明，加入根茬后，玉米和甜菜的根茬使过氧化氢酶活性相对较强，大豆根茬使过氧化氢酶的活性降低，最大降幅为36.；5%25；