Pouring frozen water in a timely manner is an important measure to ensure safe winter wheat. The specific benefits are as follows: First, the soil can be soiled, especially in recent years, most of the wheat fields are front glutinous maize straw returning, resulting in false soil preparation. Pouring frozen water can greatly improve the non-realization of this field soil. It is also conducive to freezing and thawing and weathering ash, to make up for cracks and eliminate overwintering pests. Second is to ensure proper water supply for winter wheat, to consolidate tillering before winter, to promote new births, and to combine the use of winter water and spring drought prevention. The third is to improve the thermal conductivity of the soil, which can effectively reduce the amplitude of the temperature in the field, to prevent the freezing and chilling of the dead seedlings caused by the dramatic temperature rise and fall; Fourth, to maintain alkalinity and reduce the occurrence of salinization in the soil. In addition, the winter irrigation also has the effect of promoting microbial activity, accelerating the decomposition of organic fertilizers, and satisfying the growth of wheat after turning green.
Therefore, it is particularly important to properly pour wheat frozen water. How to pour the frozen wheat water first time should be appropriate, but also according to the weather, field sensation, but also see seedlings.
The first is to look at the weather. In the autumn and winter rains, the winter cold drought is the best. Winter irrigation is suitable when the daily average temperature is stable at about 3°C. It is too early, the temperature is high and the evaporation is strong, it can not play the role of water retention and water retention, and it will cause the legume growers and even the jointing of the winter before the winter, and the freezing injury. Severe; too late, the temperature is low, unfavorable moisture infiltration, the ground easy to form ice shells. Farmers said: Do not freeze, winter irrigated too early; night, day and night, irrigation is just good; only not frozen, winter irrigation late, this is scientifically reasonable.
The second is to see the field sensation. Insufficient soil moisture content, soil moisture content in 5-20 cm soil below 13%, loam below 15%, clay below 17%, or soil relative humidity below 60%, the need for winter freezing, higher than the above indicators Slow-irrigation or no-irrigation; buckwheat glutinous rice ground is wet, the ground temperature is low, flooding should not be flooded, so as to avoid red, yellow, or even dead seedlings, spray, cellar irrigation or sprinkling can be used to facilitate Warming and keeping seedlings.
The third is to see the seedlings. Wheat early sorghum seedlings generally have better bottom tillers, which can be slow or no irrigation, flooding, late buckwheat sowing, short growing period before winter, lack of effective accumulated temperature, multiple single seedlings, in order to make full use of the effective accumulated temperature of early winter cold and warm gap, To facilitate the delivery of pan-dunk, in addition to over-arid fields, it is usually better to not use irrigation, but it is appropriate to return to Qingshui early.
The quality of winter irrigation is different and the effect is different. To prevent flooding caused by flooding, pressure, drowning silt, damage wheat seedlings; and after the winter irrigation timely sparse planing to prevent cracks and cracks, causing root dead seedlings.
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