First, due to the conditions, due to seedlings, science and fertilizer management. For wheat fields with normal growth and high fertility level, combine watering and replanting jointing fertilizers at the jointing stage; for medium-fertility wheat fields, quick-seeking fertilizers can be combined with watering in the period of standing up; for poorly growing three types of wheat seedlings, On the basis of early spring breeding, two topdressing treatments are conducted during the returning green period and the jointing stage to promote spring oysters to form panicles, increase the percentage of spikes, promote floret development, and increase grains per panicle; no base fertilizer or fertilizing amount is used for sowing. For young seedlings that are young, they should be topdressed when the soil is thawed, but should not be poured back to Qingshui, so as to avoid lowering the ground temperature and poor soil permeability, which will affect the growth of wheat plants. Can be based on fine scratching, in the early stages of wheat application of fertilizer and water, topdressing about 10 kg of urea per acre is appropriate. Watering should be carried out when the average ground temperature is stable at about 5°C so as to avoid freezing damage caused by watering prematurely.
Second, cultivator. For all kinds of wheat fields, cultivating is generally carried out before and after the turn of wheat, in order to break the surface of the surface, eliminate weeds, increase temperature and protect soil moisture, and promote seedling growth sooner or later. Specifically, the weaker seedlings should be lightly scorched, broken and hardened, and should be prevented from injuring the roots and sprouts. If the wheat fields, which may be prosperous, should be properly squatted, the growth of the above ground parts should be restrained, and the growth of the above ground should be controlled. Strong; for the extensive preparation of land, å· å¤š 多 多 多 多 , , , , , , , , , , , , , , , , , , , , , 特别 没有 没有 没有 没有 没有 没有 ä»¥åŠ ä»¥åŠ ä»¥åŠ ä»¥åŠ ä»¥åŠ ä»¥åŠ ä»¥åŠ ä»¥åŠ ä»¥åŠ ä»¥åŠ ä»¥åŠ ä»¥åŠ ä»¥åŠ ä»¥åŠ ä»¥åŠ ä»¥åŠSaline land principle. In addition, the repression should be combined with cultivator, it is best to press the Houyi first, in order to achieve the effect of the virtual reality, raise the temperature, and increase the temperature.
Third, for water-free conditions of dryland wheat, should be based on warming temperature control. After the wheat field is defrosted in the early spring, the common wheat field can be ditched and topdressed. If there is a defertilization symptom at the jointing stage, the fertilizer should be combined with the appropriate amount of rain in a timely manner; the dry fertilizer with a large amount of seedlings and a high level of soil fertility before the winter should be used. The ground may be suitable for top-dressing during the jointing season. Topdressing can be applied deeper or deeper, so as to avoid loss of fertilizers. The land that is under-applied with phosphate fertilizer should be applied with nitrogen and phosphorus.
Fourth, the focus of wheat pest and disease control is "two diseases" and "two insects", namely sheath blight, rust, and midge, and panicle blast. At present, we should focus on the control of sheath blight, and we can use systemic agents such as triadimefon, Jinggangmycin and loquat fruit to increase the amount of water and evenly spray. In the case of severe crops of wheat midge last year, the emergence of midge in mid-April will be fecund with the use of 3% lindane powder or 2-6 kg of methyl isofluosaphos granules per mu. Spread and apply water if there is no rain after application. For wheat stripe rust, it is necessary to actively implement successful experiences of "accurate detection, drug reconnaissance, discovery, and control" to prevent large-scale outbreaks.
5. For the severe fields of weeds in wheat fields, we must pay attention to the chemical weeding in wheat fields on the basis of cultivators and manual extraction. Severe plots of weeds such as swine fever, wild oilseed rape, wormwood, and leeks can be treated with wheatgrass. If serious oats occur in wild oats, they can be removed by 6.9% of the pupa. The specific time when the temperature is stable at 10 °C ~ 15 °C is appropriate, and pay attention to grasp the amount of application and application time.
6. According to the large proportion of planting area of ​​spring wheat varieties in our province and the high probability of occurrence of “cold springâ€, all regions must actively defend spring wheat crops from frost damage. According to the weather forecast, wheat fields should be irrigated in time before the onset of the cold to prevent freezing damage. In the event of frost damage, cultivators should be promptly cultivated, combined with the use of water-saving nitrogen fertilizer, promote the birth of new crops into the ear, and minimize the damage caused by freezing damage.
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