柑桔抹芽放梢和修剪效应研究

1983—1984年研究了红玉血橙(Citrus sinensis Osbeck)、兴津和尾张温州(C.unshiu Tanaka)在雅安生态条件下抹芽放梢和修剪效应的研究。研究结果表明,三个供试品种抹除夏梢,放春、秋两次梢,对于减少初投产树的落果,提高早期产量有显著作用。八月上旬为放梢适期,八月梢为最佳梢类。秋梢结果母枝可以进行人工摘心,九、十月摘心对第二年结果影响不大。秋梢母枝二、三月摘心或较重程度短截,能减少花量,促发春梢营养枝。为柑桔密植、早结丰产提供依据。

STUDIESON THE EFFECTS OF PRUNING AND DISBUDDING TO LET OUT SHOOT ON CITRUS TREES

This paper focuses on the effects of pruning and disbudding to let out shoot on three cultivars of citrus trees,Ruby blood orange(Citrus linensis Osbeck), “Xing jin” and “Wei Zhan” satsuma (C.unshiu Tanaka)under the ecological conditions in Yaan.The result shows that removing summer shoot to let out spring fnd autumn shoot has marked effects on reducing abscission of fruits to young triut-bearing trees and increasing early yield.The first ten days of August is ahe optimum period to let out shoot as shoots in August are the best.Pinching the autumn growth of the three cultivars in September and October does not have marked effects on flowering and fruiting next year.The pinching or the heavy cutting back pruning for fruit-bearing mother branches of autumn-growth in February and March may reduce the number of flowers,and increase the number of vegetative branches of spring shoot.