三种植物生长延缓剂对新丰核桃控梢促花的影响

Effects of B_9,CCC and PP_(333) on the Growth and Development of Xinfeng Walnut

【目的】选用不同浓度的B9、CCC和PP333三种植物生长延缓剂,筛选出能够控制核桃营养生长,且能提高混合花芽比率的延缓剂和最佳浓度。【方法】以新疆新丰核桃为试材,叶面分别喷施三种制剂配制成的浓度梯度为500、1 0001、500和2 000 mg/L,以清水为对照(CK),调查统计新丰核桃发枝数、发枝长、发枝粗和混合芽数等指标。【结果】叶面喷施B9浓度为1 500 mg/L时,混合花芽比对照提高403%、发枝数提高66%;枝条生长量减少59%,但对枝条粗度并无影响。【结论】初步认为对新丰核桃低产园内结合肥水管理及修剪,使用叶面喷施浓度为1 500 mg/L的B9生长延缓剂可以达到对新丰核桃控梢促花的效果。

[Objective]This study is to screen out the best retardant with the best concentration which might control the nutrition growth and increase the ratio of mixed buds of the walnut by using different concentrations of the three plant growth retardants： B9, CCC and PP333-[Method]Xinfeng walnut was used as the test material, the three plant growth retardants （B9, CCC and PP333） were set up with different concentrations at 500, 1 000, 1 500, 2 000 mg/L and then they were sprayed on the leaves of walnut; the effects of the three plant retardants on the branching quantity, branch length, branch thickness, mixed buds quantity of walnut were analyzed. [ Result] After B9 at 1 500 mg/L concentration being sprayed on walnut, the number of mixed buds and branches could be increased by 403 %, and 66 % respectively, while the branch length was decreased to 59 % than that of the control group. It had no effect on branch thickness. [ Conclusion] A basic conclusion can be drawn that by using B9 at 1 500 mg/L concentration, accompanied by fertilizer and water management on the low - yield Xinfeng walnut orchards, the walnut＇ s branches can be controlled, thus leading to the increase of the ratio of mixed buds.