Wheat Spring Fertilizer Application Technology

First, return green fat. Wheat seedlings begin to return to green when they are topdressing, which can consolidate wheat's pre-winter tiller, increase spring tiller, and accordingly increase the number of panicles per acre, and can increase the middle leaves and promote floret differentiation. Production of a large area of ​​lean land, late wheat, weak seedlings, the group is often small, the number of panicles is insufficient, which is the main factor affecting yield, green fertilizer should be applied early to promote spring hair. Usually apply ammonium phosphate 30 kg or 15 kg urea per acre. Fertilizers with sufficient fertilizer in the early stage and better-growing wheat fields do not apply green manure in principle. Second, jointing fertilizer. Application of wheat to joint fertilizer, both the role of promoting flower and keeping flowers, significantly reduce the number of degenerate spikelets and degenerate florets, is a key fertilizer to increase the number of grains per panicle. This can also consolidate effective delivery, promote superior secondary root growth and sturdy stalks, extend the internodes below the ear, enhance and extend the functional period of the upper tri-leaf, apply 5 kg of urea per mu, and favor grain formation and grouting. The time required for top-dressing and joint-fertilizing depends on the determination of seedlings. In general, leaf color fades in the group, the peak of tillering has passed, and the first part of the base is used for a fixed length; if the number of seedlings in the group is insufficient, the leaf color before jointing has fallen yellow. Appropriately increase fertilization. Third, flag leaf fertilizer. The application of flag leaf fertilizer is a new technique for high yield wheat cultivation. Appropriate application can improve the supply of nutrients during this period, expand the area of ​​flag leaf, extend the functional period of the upper three leaves, reduce the number of small flower degeneration, increase its seed setting rate, extend the duration of grain filling, and increase grain weight. The use of flag leaf fertilizer must be properly controlled according to the growing conditions of the seedlings. If it is lost or excessive, it can also cause adverse consequences such as lodging, greediness, late maturity, and production cuts. Generally, 3 kg of urea per acre is appropriate.

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