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        Wheat winter irrigation should pay attention to the problem-永利0153.comylcm

        Date:2012-09-28 11:19

        Winter irrigation winter wheat yield one of effective practice and experience. Correct winter irrigation, must consider the following three factors, namely temperature, soil moisture and growth.
        Suitable temperature required in those days average temperature is about 3 ℃. Those early SUNCOO, temperature, evaporation, no irrigation, preserving and increasing role, and also can cause seedling spindling, not too late frost; high, low temperature, freezing soil, moisture can't infiltration, often Ling Station, will make the seedling cold or choked to death. All of those when the daily mean temperature at 0 ℃ below or close to 0℃, after fill all have different degrees of frost. Of those, the cold comes, the temperature drops to 0℃, winter irrigation, high temperature is high, to ensure safety of winter wheat is good.
        From the soil moisture is taken into consideration, if less than 70% of field capacity, will be high; if more than 70%, appropriately postpone high or not high, but should strengthen soil, moisture conservation measures, improve the soil temperature, promote wheat root penetration, in seedling cultivation.
        The growth of high is also considering whether to those important condition. Wang Miao general no water fertilizer, do not have those. Attenuated vaccine ( especially the late sowing wheat, single only child ) should not be too high, in order to prevent silting seedling, Ling Station, cold damage of wheat seedling. Even dead seedling. To this kind of weak seedling, the winter water was replaced Nie water, with water fertilizer, fertilizer to wheat seedlings to attack, from weak to strong. " Wetland " wheat field, soil permeability is poor, those at easy redness, yellow, or even die, for this type of wheat in irrigation water, have before sowing, sowing the foot moisture condition, after tillering to strengthen cultivation of moisture conservation, no need to consider the winter irrigation.
        Winter irrigation water quantity can not be too big, lest the ground water, under low temperature and the formation of ice shell, resulting in shoot and root and tiller, asphyxia, die cut.
        Of those, must timely drill row loosen, avoid the soil compaction, crack damage. Late sowing wheat must pay special attention to. Soil moisture, in addition to delimit prevent soil compaction cracking and ventilation, and can improve the 0~10 cm soil temperature 1℃, is helpful for promoting seedling growth.

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