Reasonable remediation of wheat lodging during grain filling
Drainage and waterlogging to prevent secondary disasters In general, the lodging loss caused by strong winds and rainwater is aggravated, mainly due to the high temperature and high humidity caused by stacking mildew after the temperature rises. In addition, after the wheat is lodging, the soil is damp and the field is sullen, which creates favorable conditions for the occurrence of pests and diseases. Therefore, it is necessary to drain water in time to reduce the humidity in the field and reduce the occurrence of secondary disasters.
Cautiously tying up and mitigating damage. Generally, when the wheat is lodging in the filling stage, the bundling is reduced compared with the unbundling. The earlier the lodging time is, the earlier the bundling time after lodging, the greater the reduction of 1000-grain weight. Because the plants have an automatic regulation function, the leaves and cobs can naturally rise after 3 to 5 days of lodging, so that the wheat ears, stems and leaves are arranged in a reasonable arrangement. However, the bundle of 3 to 5 days before harvest has little effect on the 1000-grain weight. Therefore, it is not suitable to be bundled after the filling period, but in order to meet the requirements of the combined machine, it should be bundled or picked up before harvesting.
Scientific prevention and control of pests and diseases in the field is mainly to prevent powdery mildew and rust, and it can be sprayed with tebuconazole. The control of wheat bran can be sprayed with pymetrozine.
Spraying foliar fertilizer to prevent premature aging and increase the weight of photosynthesis after lodging, the resistance to dry heat is poor, the filling speed is slow, and the nutritional supplement should be strengthened in time. In the early stage of wheat grouting, lodging may be carried out with urea or 200 g of potassium dihydrogen phosphate per acre, and sprayed again after 7 days. Sprayed after 4 pm on a windless sunny day to reduce the evaporation of the fertilizer and increase the absorption of fertilizer by the leaves.
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