数种烤烟品种中碳氮代谢与酶活性的研究

Relationship of Carbon, Nitrogen Metabolism,Enzyme Activities and Quality in Flue-cured Tobacco Leaves

本文研究了烤烟品种K326，NC89，中烟90在不同生育期碳氮代谢和酶活性的关系。结果表明，团棵期K326的叶绿素含量、硝酸还原酶和转化酶活性及总氮含量均高于NC89和中烟90。现蕾期后，中烟90的硝酸还原酶活性高于K326和NC89，转化酶活性在整个生育期都低于K326和NC89。K326的C／N增加主要在现蕾期后，中烟90的C／N增加主要在现蕾期前。3个品种的碳氮代谢协调程度依次为K326，NC89，中烟90。

The relationship among carbon, nitrogen metabolism enzyme activities and quality of three varieties (K326. N C89 and Zhongyan 90 ) were studied during different development stages. The results indicated that K 326 appearead to have higher contents of total nitrogen and chlorophyll and greater activities of nitrate reductase and invertase than that of NC89. Zhongyan 90 at rosetle stage. After budding stage, Zhongyan 90 had higher nitrate reductase activity and lower invertase activity than K326 and NC89. The C/N of three varieties ware different at various stages. The C/N of Zhongyan 90 increased from rosette to budding,but that of K326, NC89 increased after budding stage. The order of harmony degree for carbon and nitrogen matebolism was: K326,N C89,zhong yan 90.