Winter wheat drought resistance technical guidance

At present, winter wheat in the north is at the jointing and booting stage, and has entered the peak period and critical period of water demand. Since March this year, the temperature has been high and the precipitation is insufficient. In some areas, the soil is insufficient, and the drought is outcropping. According to the meteorological department, there is still no effective precipitation in most of North China and northern Huanghuai in the middle and late April. In May, North China and Huanghuai have high temperature and low rainfall. The drought in some areas will continue to develop, which will adversely affect the winter wheat booting, heading and grain filling. Based on this, experts put forward technical guidance with the core of “resistance to spring drought, prevention of pests and diseases, freezing damage, and prevention of premature aging”.

One is to resist the spring drought. In accordance with the principle of “water-based pouring and preserving sputum-based”, we should promote drought-resistant and water-saving technologies such as sprinkler irrigation, drip irrigation and Xiaobailong, pay close attention to watering and drought-resistant seedlings, strengthen fertilizer and water management, re-apply joint fertilizer, and skillfully apply ear Granular fertilizers ensure the physiological water and nutrient supply of wheat. There is no hydration condition to implement the drought-relief measures such as planing.

The second is to prevent pests and diseases. Spring is a frequent occurrence of locusts, larvae, stripe rust, scab and other pests and diseases, and it is necessary to strengthen the monitoring, forecasting and release of disease and insects, and promote the rule of prevention and control. Strip rust promotes the successful experience of “accurate monitoring, drug detection, discovery, and control”.

The third is to prevent frost damage. At present, the threat of “cold spring cold” has not been completely relieved. At this time, wheat has completely lost its ability to withstand low temperatures below 0 °C. Once it encounters “cold spring cold”, the young ears are extremely susceptible to freezing, resulting in the extraction of spikes or white spikes. Pay close attention to the weather changes, watering and freezing before the cold wave arrives. Strengthen the management of frozen wheat fertilizer and water, promote the small cockroach to catch big cockroaches, increase the tillering rate of tillering, ensure grain filling during the booting stage, and increase grain weight.

The fourth is to prevent premature aging. Affected by high temperature and low rainfall, the winter wheat in some areas is likely to suffer from dry hot wind in the late growth stage. In addition, the dry roots of wheat are underdeveloped, and the absorption capacity is reduced in the later stage, which is prone to premature aging. It is necessary to strengthen "one spray three defenses". For the wheat field that grows de-fertilized and yellowed, the urea solution can be sprayed in combination with the watering of the panicle flower.

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