温州蜜柑的保花保果试验

A Test on Protecting Flowers and Fruits of Satsuma Orange

在温州蜜柑花谢 2 /3时 ,分别用 75mg/L赤霉素 +5 g/L尿素、75mg/L赤霉素、稀释 1 5 0 0倍云大 - 1 2 0 +5 g/L尿素、稀释 1 5 0 0倍云大 - 1 2 0和 5 g/L尿素进行树冠喷雾 ,2 0d后再喷 1次 ,第 3次落花落果后统计其座果率。结果表明 ,75mg/L赤霉素 +5g/L尿素处理效果最好 ,其座果率极显著高于其它处理及对照 ;75mg/L赤霉素、稀释 1 5 0 0倍云大 -1 2 0 +5 g/L尿素和 5 g/L尿素处理间其座果率差异不显著 ,但它们均极显著高于稀释 1 5 0 0倍云大 - 1 2 0处理和对照的座果率 ;稀释 1 5 0 0倍云大 - 1 2

When two-thirds of Satsuma orange's blossom fell,the tree-crown was separately sprayed with GA 75 mg/L+urea 5 g/L,GA 75 mg/L,Yunda-120 diluted 1 500-times +urea 5 g/L,Yunda-120 diluted 1 500-times,urea 5 g/L.Twenty days later the tree-crown was sprayed once again.After the third drop of flower and fruit,statistics on setting rate suggested that the effectiveness of GA 75 mg/L+ urea 5 g/L was best, and fruit setting rate of it was significantly higher than other treatments and contrast.There were no significant difference in fruit setting rate between GA 75 mg/L and Yunda-120 diluted 1 500-times+urea 5 g/L and urea 5 g/L,but their fruit setting rate were very significantly higher than Yunda-120 diluted 1 500-times treatment and contrast.And there was no significant difference between Yunda -120 diluted 1 500-times and contrast.