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随着科学技术的普及,棉花产量随之提高,高产地块层出不穷,传统管理方式受到冲击。为了实现棉花高产、稳产,应适当推迟浇第一水的时间。首先,高产棉田土壤保水性能好,灌足底墒水能够满足苗蕾期对水分的需求,其需水高峰期在开花期。第一水偏早,容易徒长,提早封行,造成田间郁蔽,大量蕾铃脱落,形成“高、大、空”而影响产量。据河北农大试验,当10—80厘米土层水分
With the popularization of science and technology, the yield of cotton will increase, the high-yield plots will emerge one after another, and the traditional management methods will be impacted. In order to achieve high-yielding cotton, stable yield, should be appropriate to postpone the first water time. First of all, the soil water-holding capacity of high-yielding cotton fields is good. The irrigation of soil moisture at the end of foot can meet the water demand at seedling stage, and the peak water demand is at the flowering stage. The first water is too early, easy leggy, early seal line, resulting in the field Yuyu, a large number of Lei Ling off, the formation of “high, big and empty” and affect the yield. According to Hebei Agricultural University test, when 10-80 cm soil moisture