Without winter irrigation, wheat yields are halved

2022-06-17 0 By

As the weather gradually turns cold, wheat also gradually enters the dormant period, how to carry out winter irrigation to benefit wheat growth?The advantages of winter irrigation of wheat: it can stabilize the ground temperature and prevent frozen dead seedlings;It can harden the soil, crush corks and eliminate overwintering pests.The combination of water and fertilizer in winter could create good conditions for the next spring wheat greening and root growth.Winter irrigation in saline-alkali wheat fields can also improve soil by pressing alkali.Compared with the wheat field without winter irrigation, the panicle number increased by 123,000, the grain number increased by 6.7, the 1000-grain weight increased by 1.3 g, and the yield increased by 27%.Wheat winter irrigation notes timely: the appropriate time for wheat winter irrigation, generally from the daily average temperature drops to 8℃ when the beginning, to about 5℃ when the end.The experience of the masses is that “freezing at night and dissipating in the day makes winter irrigation just right”.Winter irrigation early temperature is higher, evaporation is large, can not receive the due effect;Winter irrigation too late soil freezing, water can not be timely infiltration, ground water ice, wheat seedlings under the ice is easy to suffocate death, or the ground ice, lift the soil, pull off the wheat root, hanged wheat seedlings.Suitable land: the order of winter irrigation for wheat is generally the viscous land and low-lying land with poor water quality first and the sandy land with strong water quality second.The second and third categories of wheat fields with insufficient soil moisture or poor surface moisture were first irrigated, and then the wheat fields with better soil moisture, sowing earlier and flourishing trend were later irrigated.Appropriate amount: wheat winter irrigation water should not be too large, to be able to pour through, the day of infiltration is appropriate, generally 30 to 40 cubic meters of irrigation per mu.In order to save water, it is necessary to do drainage beds, prevent flooding.Winter irrigation can not be too large, so as to avoid water on the ground, in low temperature and the formation of ice shell, resulting in the plant ground part frozen, root asphyxia, tiller death and production.After winter irrigation, the soil must be timely columbine to avoid the damage of cracking due to soil compaction.Special attention must be paid to late broadcast.Columbine soil can not only keep soil moisture to prevent soil compaction, cracking and aeration, but also increase the ground temperature of 0~10 cm by about 1℃, which is beneficial to promote seedling growth.(Source: Gansu Farmer Daily)