研究结果表明，冻融交替作用对黑土有机质、氮钾及酶活性产生重要的影响。
The experiments results show that the effect of alternative freezing and thawing has a great influence on the organic matter, nitrogen nutrition, potassium nutrition and soil enzyme activities.
第一部分，研究了不同低温胁迫期间烟草愈伤组织抗氰呼吸的诱导与交替氧化酶(AOX)表达的关系。
In the first part, the relationship between cyanide-resistant respiration and expression of alternative oxidase (AOX) in tobacco callus treated by different temperatures was studied.
冻融交替作用明显地增强土壤中磷酸酶、硝酸还原酶和亚硝酸还原酶的活性。
The effect of alternative freezing and thawing can enhances the activities of some soil enzymes greatly, such as phosphatase, nitrate reductase and nitrite reductase.
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