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本试验研究了PP333对大旺山楂幼树生长抑制的效应及其使用的适宜浓度。试材为4年生大旺山楂树,在树冠外围延长枝生长达到20cm时,对叶面喷施1000、1500、2000、2500ppm的PP333水溶液,以喷清水为对照,共5个处理,采用单株小区,5次重复。共计25株树。试验结果表明:
This experiment studied the effect of PP333 on the growth inhibition of Hawthorn sapling and its suitable concentration. The test material was 4-year-old Hawthorn trees. When the branch growth was extended to 20 cm outside the canopy, 1000, 1500, 2000 and 2500 ppm of PP333 aqueous solution was sprayed on the foliage. Five treatments were sprayed with water as the control, Community, 5 repetitions. A total of 25 trees. The results showed that: