小麦常因晚播或早播,造成部分麦田弱苗或旺苗,根系发育差。通过镇压可踏实土壤,提高地温,具有保墒提墒作用,还有增根增蘖,提高单株成穗率,增加穗数,降低株高,使茎秆粗壮,增加抗倒伏能力。小麦镇压后,生理生化有所变化,协调了植株营养生长和生殖生长的关系,减少不孕小穗,增加 Often due to evening sowing or early sowing of wheat, resulting in some wheat field weak seedlings or Wang Miao, poor root development. Through the suppression of soil can be pragmatic, increase the ground temperature, with the role of moisture to soil moisture, as well as increased root tillering, increase the rate of per plant into a spike, increase the spike number, reduce plant height, so stalks and increase lodging resistance. After wheat was repressed, physiological and biochemical changes were made, and the relationship between plant vegetative growth and reproductive growth was coordinated to reduce the number of infertile spikes and increase