植物生长调节剂对佛手硝酸还原酶活力的影响

Influence of plant growth regulator on nitrate reductases activity in Citrus medica var. Sarcodactylis

外源植物生长调节剂可影响佛手叶片的硝酸还原酶 （ Ｎ Ｒ） 活力， 室内试验以０３ ｍ ｇ／ Ｌ 多效唑＋ ００５ ｍ ｇ／ Ｌ ６－ Ｂ Ａ （６苄基腺嘌呤） 对酶活性的促进作用最明显。生产中建议用多效唑控制佛手株型时， 应配合使用６－ Ｂ Ａ， 以保持和提高植株对氮肥的利用能力。

Data of a series of experiments confirmed that exogenuous plant growth regulators (EPGR) had an effect on nitrate reductase activity (NRA) in leaves of Citrus medica var. Sarcodactylis. In treatments of the experiments, the NRA could be enhanced, when plants treated by a mixture of the EPGR and PP333, in which increment of NPA was the largest under conditions of applying the mixed solution of 0 3 mg PP333/L and 0 05g 6 BA/L It was recommended that when PP333 was applied to Citrus medica var. Sarcodactylis in order to control its plant type in practice, 6 BA should be added to PP333, for keeping and improving ability of N ferti lizer utilization in the plants.