【摘要】 柑桔落花落果动态的试验结果表明 ,长沙地区柑桔主栽品种南桔、柑、沙田柚、华脐、宫川蜜桔的落蕾落花在 4月中旬 ,第一次生理落果高峰在 5月上、中旬 ,即谢花后 1～ 2周 ,大量幼果从果梗脱落 ;第二次生理落果高峰在 6月上、中旬。在第一、二次生理落果前应用植物生长调节剂进行保果 ,以赤霉素效果最好 ,植保素综合效益最佳 ,其它亦有一定的效果。更多还原

【Abstract】 The experiment of the flower and fruit drop of or an ges shows the flower drop peak of the main orange varieties in Changsha is in Ap ril. The first fruit drop peak is in May, that is, large amounts of young fruits drop from the trees; the second fruit drop peak is during the early and middle June. Before the first and second fruit drop peak, plant growth regulators shoul d be used to protect fruits, gibberelin can get the best effect and pisatin, the best composite results.更多还原