调节膦对花生某些生理过程的影响及其增产作用

在花生结荚后期叶面喷施500 ppm的调节膦,能明显地提高花生荚果产量,增产率约百分之十二至百分之十五,喷期过早或浓度过高则使增产幅度下降,甚至引起减产。在喷药时期与浓度合适的情况下,不仅产量增加、百果重、百仁重提高,而且,果仁肉蛋白质及油脂的含量均有所上升,品质得到了改善。叶面喷施调节膦使光合作用得到加强,地上部的生长受到抑制,营养物质的分配与积累亦发生了变化,根/冠比及生殖体/营养体比值上升.此外,后期无效花的减少亦有利于产量的提高。

Effects of Foliar spraying Fosamine to Increase the Yield of Peanut and its Mechanism

Fosamjne, anew-type plant growth retadant which applicatien to field crosp had not been studied systematically before, was used now broadly iaforestry sa brush-control egent. In the past 5-yr we studied the effect of foliar spraying in order to increase the yield of peanut and its mechanism. (1) Foliar spraying of fosamine (500ppm) at the late pod-forming stage could increase the yield of peanut, the increment in average was about 12--15%. The pod yield would be decreased when the fosamine was sprayed too early or its concentrations were too high. (2) The protein and oil content of kernels would be increased as well when the fosamine was sprayed with proper concentrations at proper growth stage. (3) Spraying fosamine could increase the photosynthesis, inhibit the growth of up-ground part of peannt, the distribution and accumulation of nutriunts changed to the direction of yield irnprovment, so that the ratio of root/shoot and reproductive organs/vegetative organs was increased, beside reducing the number of infertile flowers in the later period of blooming would also encourage the accumulation of nutrients in the fertile pods and increase the production of peanut.