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土壤酶活性的强弱是土壤肥力高低的重要标志之一。脲酶是土壤中一种主要的酶,它对氮素营养的生物学循环起着重要作用,对供应农作物的氮素营养有积极作用。为此,我们特对绿肥腐解过程中脲酶活性作了测定,现将结果简述如下: 冬绿肥掩青区,翻压四十天时,脲酶活性高于翻压五十天时;冬闲地则与此相反。夏绿肥掩青区,翻压二十天时脲酶活性高于小麦播种前:夏闲地则与此相反(见表)。从下表中还可看出:脲酶活性随着土层深度而
Soil enzyme activity is an important indicator of soil fertility level. Urease, a major enzyme in soil, plays an important role in the biological cycle of nitrogen nutrition and plays a positive role in the nitrogen nutrition of crops. To this end, we specialize in the degradation of green manure urease activity was determined, the results are summarized as follows: winter green manure cover the Qing area, turn over pressure forty days, the urease activity is higher than the turn pressure fifty days; This is the opposite. Summer green manure cover the Qinghai area, overpressuring 20 days urease activity is higher than before sowing: summer fallow land is the opposite (see table). It can also be seen from the table below that urease activity varies with soil depth