The wheat sown properly in Huaibei district normally starts jointing around March 10; the late-planted wheat is jointed on March 15-20. According to the fact that during the autumn of last year, due to the long sowing time of the dry wheat and the large difference in the wheat seedling situation, the following measures should be taken into account in the field management of wheat during the jointing period:
1, top dressing. Any wheat field with an acreage of 600,000 hectares and above during wintering and wintering before the beginning of the year should not be allowed to return to green manure in the beginning of the spring, and should not be watered when it encounters general drought; after the spring of the wheat field with excessive population and overgrowth Repression, deep cultivating, and so on are all designed to control the growth of childbirth after childbirth and to promote premature delivery and yellow degradation. The jointing of spring wheat no longer breeds, and the young spikes enter the florets differentiation stage. At this time, the seedlings will be treated with 3-4 kg of urea per mu, such as drought combined with top dressing for irrigation. The fertilizer and water supply was sufficient during this period, which had a significant effect on reducing the deterioration of floret and increasing the number of grains per spike.
In the late-seeding wheat field before entering the winter, the wheat seedlings only had 3 leaves per plant, no tillers, and 300,000 mu of basic seedlings. Such wheat fields should be top-dressed early in the spring to warm up, promote the early growth of the wheat seedlings, and promote the early parturition and promote the growth of the Oita. Spike, strive for the number of acres per mu to reach the predetermined target. When the number of stems and stems in the barley field reached 600,000, the suppression was carried out 5-7 days before the jointing, which promoted the early degeneration of the tillers that could not form the panicles and made the bottom section of the stem compact, enhancing the lodging resistance in the later period.
2, weeding. Weeding and weeding before weaving, weedy fields can be weeding with herbicides. Use herbicides should be strictly used and sprayed evenly. Chemical weeding should end 5-7 days prior to jointing.
3, control. For wheat cultivars with high stalk varieties (such as Prunus 8802), chemical control is conducted 7-10 days before jointing. Use 15% paclobutrazol wettable powder per acre 40-50 grams of water evenly sprayed 50 kg. Generally, the height of wheat plants can be reduced by 5-7 cm. Chemical control bogey excessive usage, wheat jointing should not be reused.
4, pest prevention. Timely control of wheat aphids, spider mites and sheath blight pests and diseases. If too much rain, but also clear the ditch drain to prevent waterlogging.
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