提高龙眼重回缩修剪树N,P,K营养水平和抽穗率的技术  

Technology of Increasing N, P, K Nutrition Levels and Flower Branch Rate of Heavily Retractive Pruned Longan Trees

作　　者：卢美英[1] 徐炯志[1] 黄永敬[1] 何全光[1] 杨冬霞[1] 

机构地区：[1]广西大学农学院,广西南宁530005

出　　处：《热带作物学报》2004年第3期14-17,共4页Chinese Journal of Tropical Crops

基　　金：国家攻关项目(国攻2001BA901A27);广西科学基金项目(桂科基0236007);广西科学研究与技术开发项目(桂科攻0322001-1);广西大学科研基金项目(X0102038)。

摘　　要：对树体高大、交叉封行的龙眼树作重回缩修剪;剪后施用多效唑、乙烯利调节生长、控梢促花;测定叶片的N,P,K含量;调查翌年枝梢抽穗率。结果表明:①重回缩修剪对叶片N,P,K水平有明显影响,但对各次梢影响程度不同;②适当施用多效唑及乙烯利对提高重回缩修剪树叶片N,P,K营养水平及枝梢抽穗率有良好作用。Heavily retractive pruning was carried out of big and high longan trees (Dimocarpus longan Lour) which had empty canopies and intersected each other. After that, PP333 and CEPA were used to adjust growth and promote flowers. N, P, K contents in the leaves were determined. The result showed that N,P,K contents were severely affected by heavily retractive pruning, and that the effects varied in different flushes. PP333 and CEPA could raise N, P, K contents in the leaves and the flower branch rate of the heavily retractive pruned longan trees.

关 键 词：龙眼 重回缩修剪树 N P K 营养水平 抽穗率 

分 类 号：S667.2[农业科学—果树学]