Recently, as the temperature gradually rises, the wheat in our province has gradually entered the greening, rising, and jointing stages. This stage is the key period for the number of grains to be preserved and the basis for grain weight, and also an important period for management of wheat fields. Recently, the Provincial Department of Agriculture issued technical advice on spring wheat field management, guiding the province to implement key technical measures to increase production, and then harvesting high yields of summer grain.

This year, the province's wheat winter management has achieved remarkable results. During the winter, the seedlings are better, and the climatic conditions are generally favorable. Most of the soil moisture in the province is more suitable. Although the situation is generally better, there are still some problems that cannot be ignored. For example, there is less rainfall in the north of Henan and western Henan, and the drought has risen. Due to the high temperature in winter, some wheat fields are more serious. The early stage, the large amount of sowing, and the fertile water have a prosperous trend, and there are also potential hazards such as spring frost damage and late lodging and premature aging. To this end, the Provincial Department of Agriculture, in conjunction with the current form of wheat production, proposed the following key technical measures:

1. Repressing and arranging , keeping seedlings grow steadily For the wheat fields with extensive land preparation, sloping, and soil emptying during planting, it is necessary to timely suppress, solidify the soil, bridge the cracks, reduce water evaporation, and promote root growth; for sowing early, sowing Too many, the group is too large over the fertile wheat field, should be generally suppressed during the rejuvenation period, inhibit growth, control and turn strong; for dryland wheat fields without water pouring conditions, early spring should promptly suppress the phlegm, generally should be pressed first, Solid soil, solid cracks, improve the moisture, promote the early growth of wheat seedlings; timely watering the wheat field after watering, break the knot, protect the temperature, prevent or mitigate the threat of freezing damage.

Second, strengthen the classification management, scientific operation and fertilizer

  1. For a type of wheat field with a total stem number per mu in the regreening period of about 800,000 and a high level of soil fertility, the spring management should be promoted before the control, and the seedlings can grow steadily. Watering can be combined in the middle and late stages of jointing, and 10 kg of urea per mu is applied. Left and right; general level of wheat field, in the early stage of jointing, combined with watering acres of urea application of about 15 kg, in order to increase the rate of tillering into spikes, and promote the emergence of large grains.
  2. For the second-class wheat field with a total stem number per acre in the greening period of about 700,000, it can be combined with watering and applying about 15 kg of urea in the initial stage of the body-lifting or jointing stage to promote the stable growth of the seedlings, increase the tillering rate, and cultivate the strong stalks. . If the drought continues to develop after the spring, the second type of wheat field should be watered early and the seedlings should grow normally.
  3. For the three types of wheat fields with a total stem number of less than 500,000 per mu in the greening period, it is necessary to promote the three types of wheat fields in the spring, and the spring topdressing can be carried out twice. The first time in the regreening period of 5 cm, the temperature is stable above 3 °C, with 5-8 kg of urea per acre and appropriate amount of diammonium phosphate; the second time in the jointing stage, 5-10 kg of urea is applied per acre with watering. In order to increase the rate of ear formation, promote the development of florets, increase the number of grains per ear; for the late seeding and weak seedlings with normal leaf color and growth, it is necessary to control the early spring watering so as not to reduce the ground temperature and soil permeability and affect the growth of wheat seedlings.
  4. For the wheat field with a total stem number per acre of more than 900,000 in the regreening period, the early spring is dominated by the control, the seedlings are suppressed, and excessive spring tillering is avoided. The fertilizer and water management can be postponed until the end of the middle and late stages of the jointing, combined with watering. Mu chasing urea 10 to 15 kg, if there are symptoms of de-fertilization, the time of topdressing and watering can be appropriate in advance to prevent the de-fertilization of Wang Miao.
  5. For dryland wheat fields without irrigating conditions, it is necessary to use the cracking as a key measure for spring wheat field management, and seize the favorable opportunity after rainfall and snow, and apply 10 kg of urea with fertilization or ditching, and apply Appropriate amount of diammonium phosphate, before the winter to divide into the ear, promote spring and spring tillers to grow early and fast, and strive for the number of spikes to ensure production.

Third, select the right pesticides, comprehensive control of pests and diseases

Focus on the control of wheat sheath blight, stripe rust, root rot, red spider, midge, and aphids. Wheat greening period, control of sheath blight, 5% Jinggangmycin water 200-250 ml per acre, 12.5% ​​diniconazole 30 g, 20% triazolone EC 60-80 ml, water 50-60 kg Aligning with the base spray of wheat stems, it can treat wheat root rot, total eclipse, etc., and control stripe rust early.

For wheat stripe rust, spray control is generally carried out in late April and early May; the control of red spider is sprayed with 1.8% avermectin 3000-4000 times solution or 20% hydrazine 15000 times solution. The wheat larvae should strictly control the two key aspects of the pupa stage and the adult stage. In the middle and late April, the census of the larvae is organized to accurately monitor the occurrence area, the density of the worms and the time of phlegm. At the peak of the phlegm, 3% phoxim particles per acre are used. 2 to 3 kg or 48% chlorpyrifos EC 200 ml, mixed with 20 kg of fine soil mulberry mulberry application, if no rain should be properly watered after application.

For wheat fields that have not been chemically weeded before winter, after the temperature in the spring has passed 6 °C, choose sunny weather from 10 am to 4 pm, and choose the herbicide to be removed in time. Prevention and control of pests and diseases should be strictly in accordance with the recommended dosage of pesticides, appropriate concentration, period of use and technical procedures to avoid phytotoxicity.

This article URL: Henan Province, spring wheat field management technical advice, the introduction of scientific management, fertilizer, water, control, pests and diseases

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