水稻倒伏是农业生产上长期以来未解决的问题之一。应用植物生长调节剂防止水稻倒伏,以前曾做过些研究,但还未找到理想的生长调节剂。1976年英国首先发现生长抑制剂pp333,经试验证明对果树、草本植物等有抑制生长的作用。近年在水稻上试用,也表现出对植株有矮化的效果。我们在单季晚稻、糯稻、直播稻上开展了应用pp333防止水稻倒伏的试验研究工作,初步证明在水稻上应用pp333有明显的抗倒效果。 pp333能有效地控制水稻植株的生长,一般株高比对照矮10厘米左右。主要是基部第一、二、三节明显减短,处理的为2.10、7.64、13.56厘米,比对 Rice lodging is one of the unsolved problems in agricultural production for a long time. Application of plant growth regulators to prevent rice lodging, have done some research before, but have not found the ideal growth regulator. In 1976 Britain first discovered the growth inhibitor pp333, the test proved that fruit trees, herbs and other inhibition of growth. In recent years, rice on the trial, also showed a dwarf effect on plants. We conducted a pilot study on the application of pp333 to prevent lodging of rice in single-season late rice, glutinous rice and direct seeding rice, and initially proved that application of pp333 on rice had obvious anti-down effect. pp333 can effectively control the growth of rice plants, the general height of about 10 cm shorter than the control. Mainly the first base, two, three significantly reduced, dealing with 2.10,7.64,13.56 cm, compared to