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多效唑具有降低纵向伸长,缩短节间,促进小麦分蘖,防止倒伏和预防真菌性病害等作用.我县1991年采用春季叶喷防倒面积达49万亩,已占小麦播种面积80%以上.但是多效唑在小麦上使用的最佳时期还需进一步研究.为此1990年秋开始,我们搞了小麦不同时期喷洒多效唑的试验.现将试验结果报告如下.
Paclobutrazol has the effect of reducing longitudinal elongation, shortening the internode, promoting wheat tillering, preventing lodging and preventing fungal diseases, etc. In 1991, the area was 490000 mu with spring leaf spray, accounting for more than 80% of the sown area of wheat. However, the best period of application of paclobutrazol on wheat needs further study, so we started the experiment of spraying paclobutrazol at different periods of wheat in the autumn of 1990. The test results are reported as follows.