Green wheat needs to add fertilizer

Wheat spring water and fertilizer management is an important period in wheat management. The quality of water and fertilizer management is directly related to the changes of the population, the development of the root system, and the number of panicles, thereby affecting grain number and grain weight. Therefore, it is necessary to rationally apply fertilizer according to the seedlings and lyrics.

1. According to the fertility of the wheat field to determine fertilization varieties, soil fertility levels are higher, base fertilizer application of sufficient amount of organic fertilizer in wheat, spring or less nitrogen fertilizer application, only the application of phosphorus and potassium fertilizers. In wheat fields with poor soil fertility and insufficient basal fertilization, some nitrogenous fertilizers should be added, and phosphorus and potassium fertilizers should be used in combination.

2. According to the time of fertilization in the development stage of the seedlings, it is usually the best time to apply the jointing fertilizer in the middle and late March. At this time, fertilization can promote the formation of large panicles, improve the percentage of panicles, promote the differentiation of spikelets and florets, and obtain more large panicles and grains while promoting the growth of the top three leaves. For wheat fields with strong water retention and fertility, they can be applied as early as possible, and sandy loam with poor fertility and water retention can be used as appropriate.

3. According to the climate and soil fertility method, fertilization should be conducted at noon on sunny days. Irrigated wheat fields can be sprayed immediately after the application of fertilizers. Fields without irrigation conditions should be applied 6-7 cm underground.

4. According to the practice of applying topdressing outside the roots of wheat and the top dressing, the selected fertilizer type and spray concentration will depend on the specific conditions of wheat growth, soil nutrient status, and climate. General heading to milk ripening period, such as yellow leaf color, premature aging wheat defertilizer, the focus of spraying nitrogen fertilizer, spraying 1-3% urea solution per acre or 3%-5% of ammonium sulfate solution 50-60 kg, increase production The effect is very significant. In high-yielding wheat fields with no premature aging, no topdressing nitrogen fertilizer is needed. There may be gluttonous and late-maturing wheat field crops. Do not top-coat nitrogenous fertilizer. Spray 0.3-0.5% potassium dihydrogen phosphate solution per acre for 40-50 kg. Increase production effect. The phosphorus-deficient wheat fields with more nitrogenous fertilizers sprayed with 2%-4% superphosphate solution or 0.2%-0.3% potassium dihydrogen phosphate solution 40-50 kg per acre can also achieve the effect of promoting grain filling and increasing grain weight. . The middle and low-yield wheat fields can be sprayed with nitrogen and phosphorus, which has a very obvious effect on promoting grain filling and delaying plant senescence.

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