Control the long wheat fields. The number of acres of stems in Wangmiao wheat field is more than 800,000. Due to the large size of the wheat field, the leaves are slender, and after the jointing stage, it is easy to cause depression in the field and poor illumination, resulting in lodging. Therefore, spring management should adopt measures based on control and control.
First, timely suppression. The repression of wheat from the greening period to the rise of the body is a good measure to control the growth of the market. When cracking, start at 10 o'clock in the frost-free day, pay attention to the frosty wheat field without pressure, so as not to damage the wheat seedlings. The saline-alkali field is not pressed to prevent soil compaction and affect soil ventilation. The wheat field has not been pressed, so as not to break the internodes, resulting in insufficient spikes.
The second is to spray the chemical control agent. For the over-wild wheat field, spraying the chemical control agents such as “Zhuangfeng’an†and “Maijujin†during the period of returning from wheat to the beginning of the body can inhibit the elongation of the first internode of the base, control the excessive growth of the plant, and promote the root system. Prevent lodging in late growth. Generally, the amount of acre is 30-40 ml, 30 kg of water, and the leaf spray.
Strengthen weak seedlings to promote management. Generally, there are less than 450,000 plants per acre, which are mostly late seeding and weak seedlings. Spring field management should be based on promotion. As long as the glutinous wheat is acceptable, it should be avoided in early spring to avoid lowering the ground temperature and affecting the soil permeability to delay the growth and development of the wheat seedlings. In combination with the recent effective snowfall in Shaanxi, we should do a good job of topdressing in the seedling stage, so that the fertilizer effect can be applied before the peak of tillering, so as to increase spring tillering, consolidate the tillering before winter, and increase the number of ears per mu.
Fertilizer management should pay attention to classification: about 400,000 groups of late sowing seedlings, in the case of better lyrical conditions, spring topdressing should be divided into two: the first time in the middle of the return to green, 5 cm ground temperature starts around 5 °C Apply 50% of the fertilizer fertilizer and 50% of the ammonium phosphate, while watering, promote tillering and root growth, increase the tillering rate, and the remaining 50% of the fertilizer to be applied later in the jointing stage to promote wheat development and increase the ear Number of grains. For the wheat field with a population of nearly 450,000 plants, it is generally topdressed and watered in the early stage. The average mu is about 15 kg of urea.
For the weak seedling wheat field without hydration conditions, on the basis of the early spring repression and mulching, after the soil is re-slurry, the fertilizer will be applied with fertilizer or ditch to increase the number of ears per mu and The number of kernels per spike increased grain weight and increased yield. If the phosphate fertilizer is not applied to the base fertilizer, the diammonium phosphate should be added to the nitrogen fertilizer.
Strengthen monitoring and control pests and diseases. The period from greening to jointing is the pathogenesis of sheath blight, stripe rust, total erosion and root rot. The flowering period is the onset of scab. At this time, wheat spiders and mites also begin to harm. The forecasting and forecasting work of pests and diseases guides farmers in timely prevention and control.
Do a good job in chemical weeding. At present, the herbicides which have a good effect on the control of broad-leaved weeds in the wheat field have herbicides such as typhine, maixi, mai, and superstar. 30% wheat old powder 30 grams per acre to water 35-40 kg spray to control broadleaf weeds is also very good. For single-leaf weed-based wheat fields, 6.9% Hummer 60-70 ml per mu or 3% Shima EC is 25-30 ml per acre, and 35-40 kg of water and stem spray can be controlled to achieve good control effect. . The plots where the broadleaf weeds and the grass weeds are mixed can be mixed with the above agents. The period of use of the herbicide is generally from the greening period to the start of the body. When using, strictly follow the concentration and technical operation procedures to avoid phytotoxicity.
Prevent wheat frost damage. After the spring temperature rises, with the acceleration of wheat growth and development, the ability of wheat to resist cold gradually declines, and the temperature in spring is changeable. In recent years, wheat freeze damage has occurred in recent years. All localities should take precautions to prevent "cold spring" and night frost damage. Weather forecasting, strengthening seedling monitoring, before the cold wave comes, watering and freezing in advance; once suffering from freezing damage, it is necessary to immediately guide the masses to top dress and water, and promote their recovery.
Prevent indigo. Indigo will cause the wheat seedlings to lose a lot of leaves. Therefore, effective measures should be taken to strengthen the care of the animals, and it is strictly forbidden to keep the animals green and protect the wheat seedlings.
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