叶面喷施肥对丝棉木生理效应的影响

以3年生丝棉木植株为试材,采用完全随机区组设计,设1%尿素,1%尿素+1%磷酸二氢钾,1%尿素+1%磷酸二氢钾+0.5%微量元素(铁、锌、铜、锰)3个处理,进行叶面喷施,清水喷施作对照,测定SOD、POD和PPO酶活性。结果显示,不同处理对丝棉木SOD酶活性的影响非常明显,配施高于单施,以多元肥为最优;施肥对苗木各器官内POD酶的影响十分明显,不同时期、不同器官喷施N、P、K肥能增强提高苗木体内POD酶活性;施肥可提高苗木体内PPO酶活性,增强苗木抗性,尤其不能忽略多元素复合肥的作用。总之,3种不同处理与对照相比对植株酶活性的效应显著,多元复合肥能够提高和延长丝棉木叶的酶活性,且更有利于提高苗木的抗逆性,促进苗木成活。

Physiological Effect of Leaf Fertilizing on Euongmu seaackii

Took the 3-year old Euongmu smeoackiig as sample, and randomized block design with three replications was used, spreaded 1% carbamide,1% carbamide＋1% KH2PO4＋0.5%（Fe, Zn, Cu, Mn）, randomly setted three groups and takes treatments by spreading CK water as the fertilizer to observe SOD, POD and PPD enzyme activity principle. The result showed that： different leaf fertilizing had different effect on the SOD enzyme activity, by contrast, the multi-fertilizing was better than the mono-fertilizing; fertil- izing had obvious effect on the POD enzyme which was in the plant and in the different period, different parts N,P,K fertilizers could improve the POD enzyme activity; fertilizing could improve the PPO enzyme activity to enhance the resistance, especially the multi- fertilizing effect couldn＇t be ignored. In general, three different treatments had obvious resuhs, and the multi-fertilizing could improve and lengthen the enzyme activity of the Euongmu smeaockiig to enhance plants resistance and ensure the new seedings survival.