生长调节剂对麻疯树成花及营养物质的影响

运用正交实验设计,用不同水平的6-苄氨基嘌呤（6-BA）+赤霉素（GA₃）+肥种处理麻疯树茎尖,研究外源物质对麻疯树花芽分化及树体内营养物质的影响。结果表明:各处理对麻疯树成花数量有显著影响,6-BA（2 mg/L）+GA₃（50 mg/L）+肥种（氮）为最优促花组合,正交实验设计中以6-BA（0.5 mg/L）+GA₃（50 mg/L）+肥种（氮）的促花效果较好;GA₃是影响麻疯树成花的主要因子。处理促进营养生长和生殖生长,二者交错进行。处理株叶片内氮、可溶性糖、淀粉、C/N比、钾的含量和变化趋势均呈增加-降低-再增加的S型模式。磷的含量在早期达到最大,之后便持续下降。叶片内钾在最高含量是最低含量的4.8倍,变幅最大,磷和钾呈极显著正相关。枝条生长与叶片内可溶性糖含量显著负相关。

Effect of Growth Regulator on the Flower Bud Differentiation and Nutritive Material of Jatropha curcas

To understand the effect of allogeric material on flower bud differentiation and nutritive material of Jatropha cure as,different levels of 6-BA（6-benzylaminopurine）+GA₃（gibberellin）+fertilizer were sprayed on the stem apex with orthogonal test.The results showed that it had obvious effect on promoting flower bud formation.The best combination in promoting flowering was 6-BA（2 mg/L）+GA₃（50 mg/L）+N（urea1%）.Flower buds were borne most upon the stem tips treated with 6-BA（0.5 mg/L）+GA₃（50 mg/L）+N（urea1%）.GA₃ was the key factor in promoting flower bud formation.Treatments increased the rate of vegetative growth and reproductive growth alternatively.The leaf-status of N, K,sugar,starch and C/N changed in S-bend:increasing-decreasing-increasing.P content reached the highest after treatment and then steady declined.The maximum level of K was 4.8 times the minimum of itself.The content of P and K was significantly positive.Vegetative growth had a significant negative correlation with the content of soluble sugar.