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1.水肥促控法。早期发现双亲发育不协调时,对发育迟缓的亲本给于偏追肥、偏浇水,促其生长发育。对发育偏早的亲本采用深中耕断根法,抑制其生长发育,其做法是:在可见叶有11～14片时,用铁锨在主茎周围6～7厘米上下直切15厘米,断掉部分永久根,控制其生长发育。但要注意在11叶前和抽穗时控制均没有作用。
1. Fertilizer promote control law. Early discovery of unparalleled parental development, the parents of the developmental delay to the top dressing, partial watering, and promote their growth and development. The development of early parents using deep-tillage root-cutting method to inhibit its growth and development, its approach is: in the visible leaves have 11 to 14 when the iron stem around the main stem 6 to 7 cm up and down straight cut 15 cm, broken off part of Permanent roots, control their growth and development. However, it is important to note that there is no effect until the 11th leaf and during heading.