我们用植物生长调节剂多效唑,进行多次化调小麦的试验,结果表明:化调能促进穗部生育,实现穗大粒多,提高产量,株高降低,茎节短而粗,生长粗壮。化调一次,亩产326.8公斤,化调二次亩产351.5公斤,化调三次亩产402.9公斤。比对照分别增产2.1％,9.8％,25.8％。我们总结出多次化调的关键技术如下: We use the plant growth regulator paclobutrazol to carry out multiple wheat experiments, the results showed that: the transfer can promote the spike fertility, to achieve large spikelets and more yield, lower plant height, short and thick stems, thick growth. A tune, a 326.8 kilograms per mu, the second transfer of 351.5 kilograms per mu, three times per mu adjusted 402.9 kilograms. Which increased by 2.1%, 9.8% and 25.8% respectively compared with the control. We conclude that the key techniques of multiple adjustments are as follows: