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1993～94年,在全市大面积推广桃树使用多效唑,两年累计开发面积2000ha.。据调查测算,1993、1994两年平均每亩桃树使用150g15％的多效唑可湿性粉剂,亩增产桃果680kg,增值476元,且树体矮化,枝条缩短,通风透光;节省夏季修剪用工3～5个,投入和产出比达到1:67.2,效益十分显著。 多效唑是一种新型植物生长延缓剂,能抑制植物内源赤霉素的生物合成,使细胞分裂速度下降而无其他毒性。由于生长延缓,改变了同化产物分配的方向,有利于成花、座果,提高产量。不同品种桃对多效唑的反应不一,南方品种群(如上海水蜜),在施用同量多效唑的情况下,反应较敏感。据我们5年来的实践,桃树使用多
From 1993 to 1994, the extensive use of paclobutrazol in peach trees was promoted in the whole city. The total area for development in 2000 was 2000ha. According to the survey and calculation, in 1993 and 1994, the average peach tree used 150g15% of Paclobutrazol WP per mu in 1993 and 1994. The yield of peach 680 mu and the added value of 476 yuan per mu were dwarfed by trees and the branches were shortened and ventilation and light were saved. ~ 5, input and output ratio reached 1: 67.2, the effect is very significant. Paclobutrazol is a new plant growth retarding agent that inhibits the biosynthesis of endogenous gibberellins in plants and reduces the rate of cell division without any additional toxicity. As the growth delay, changing the direction of the assimilation product distribution is conducive to flowering, fruit, increase production. Different varieties of peach responded differently to paclobutrazol. In southern varieties (such as Shanghai water honey), the response was more sensitive when the same amount of paclobutrazol was applied. According to our five years of practice, peach trees use more