Usually, the season starts with a nice little pattern, a tri-petal flower or such like, one or maybe two in rape if we are lucky.
通常,怪圈季是以一个漂亮的小图案开场,比如三瓣花之类的。运气好的话,油菜田里会出现一两个怪圈。
However the soil invertase activity between rape and wheat fields was at the same level, which showed that the plant did little influence to soil invertase activity.
油菜地各处理土壤过氧化氢酶活性高于小麦地相对应处理,而不同作物种植方式对土壤转化酶影响不明显。
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