复合细胞分裂素对脐橙的保果效应试验研究

脐橙被誉为柑桔之冠，是赣南很重要的一种经济果木。由于脐橙单性结实的特性，落花落果严重，座果率低下。人为补充外源激素被认为是提高座果率、增加产量的一项有效措施。本试验结果表明，用细胞分裂素和赤霉素等组成的混合型植物生长调节剂－复合细胞分裂素，在脐橙谢花末期涂果一次或在谢花末期至第二次生理落果前涂果两次，均能极显地提高座果率，具有良好的保果作用。在不同处理中，以６－Ｂ浓度为２００ｍｇ／Ｌ的复合细胞分

A STUDY ON THE INFLUENCE OF 6-BA MIXTURES ON FRUIT-SET IN NAVEL ORANGE

Navel orange is one of the best species of citrus,it is an economically important fruit treein Southern Jiangxi.Due to the characteristics of parthenocarpy,the flower and fruit abscissionis serious and the proportion of potential fruits attaining to final harvest maturity is very low.Applying exogenous hormones is regarded as an effective approach to raise the rate of fruit-setand the fruit yield as well.The influence of 6-BA mixtures comprised of 6-benzylamino purine(6-BA)and gebberellin(GA_3)and other components on fruit-set in navel orange was studied.Spreading 6-BA mixtures on the early fruit once at the post-flowering stage or twice from thepost-flowering stage to the second physiological fruit abscission signicantly raised the rate offriut-set.The most effective and economic concentration of 6- BA in the mixtures is 200 mg/L.