According to the forecast of climate trends by the Meteorological Department, the average temperature this winter is slightly lower than usual. In order to effectively prevent the effects of barley freezing damage and weed damage, the following effective measures must be taken to prevent:
Topdressing and antifreeze For fields with poor soil quality, insufficient base fertilizer application or late sowing date, use the favorable opportunity of high soil moisture to apply seedling fertilizer in time, and apply quick-acting fertilizer in time for freezing and waterlogging fields to promote barley growth. Generally 3~5 kg of urea is topdressed per mu.
Chemical control and anti-falling land plots with prosperous growth or high density can choose chemical control and anti-falling. The specific method is to reduce the dosage of paclobutrazol and mix with mepiper, or use the compound of paclobutrazol and mepiper, dozole·mepiper, to prevent the wheat seedling population from increasing too much.
Timely chemical weeding For fields that have not been removed before, chemical weeding is carried out before jointing. The herbicide should be sprayed in fine weather. It is recommended to use 5% pinoxaden; for broad-leaved weeds, use 20% fluroxyacetic acid 70 ml/mu, and spray stems and leaves for control.
For wheat fields with weak growth or freezing damage, the spring topdressing time should be appropriately advanced for the turning-green jointing fertilizer and booting fertilizer topdressing. The turning-green jointing fertilizer shall be topdressed with about 7.5 kg of urea per mu. For wheat fields with high fertility, sufficient base fertilizer, and vigorous growth, it is necessary to apply less or no nitrogen fertilizer. To prevent late maturity and lodging, 3 kilograms of phosphorus pentoxide and 2.5 kilograms of potassium oxide can be topdressed per mu during the re-green jointing period. Booting fertilizer is applied according to the seedling condition. For fields with less than 250,000 ears per mu, 3~5 kg of urea per mu can be applied at the beginning of earing. In addition, according to the occurrence of diseases and pests in the field, timely control of barley aphids, sheath blight, powdery mildew, head blight and other pests and diseases should be carried out.
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