【摘要】 对8年生晚实嫁接核桃树,于春季新梢长15cm左右时进行多效唑叶面喷施处理,试验结果表明,1000～2000ppm浓度的多效唑可显著抑制核桃树营养生长,以2000ppm处理树于8月27日调查结果为例,新梢长度、节间长度、新梢粗度、干径和叶面积分别比对照降低61.5、21.4、29.1、28.2和59.9％。单株坚果数和产量分别比对照增加57.9和64.9％。多效唑对核桃树的生理效应包括:降低GA₈、IAA和ABA水平,增加叶绿素、可溶性糖和蛋白质含量,对坚果品质影响不大。讨论了多效唑对核桃树的可能作用机理。更多还原

【Abstract】 In this paper, the effect of paclobutrazol on the growth and development of walnut and its physiological mechanism were studied. The results showed that paclobutrazol (1 000~2 000 ppm) could significantly depress the growth of shoot (decreased the length and thickness of shoots), reduce the trunk diameter and single leaf area, increase the number of nuts and greatly raised the yield per plant. The physiological effects of paclobutrazol on walnut were as follows; increase the concentrations of chlorophyll, soluble sugar and protein in leaves, reduce the contents of GA3, IAA and ABA in shoot tips or buds, and had no influence on the quality of nuts. The paper also discussed the possible mechanism of paclobutrazol affecting walnuts.更多还原