Hybrid mid-season skillful application

Hybrid mid-season skillfully applying panicle fertilizer is an important technical measure to capture high yield. In order to grasp the benefits, we must grasp the principle of "seeing the situation before and after watching". Because of the application of seedlings, we can fully exert the effect of increasing yield of panicle fertilizer.
Where the early topdressing is appropriate, the growth of the seedlings is stable. After the re-watering of the sun-dried fields, the rice plants are normal in color, and the fields with moderate population size should focus on the preservation of the flowers, and it is appropriate to apply the flower fertilizer; if the previous topdressing is insufficient, the color of the leaves after rehydration Rapidly faded, there is obvious phenomenon of de-fertilization or insufficient seedlings in the early stage, and the low-yielding seedlings with long-term deviations must not only protect the flower fertilizer, but also prevent the degradation of the branches and the spikelets, and also promote the flower fertilizer to promote the number of spikelets. Increase and fight for some late smashing into spikes. For the field where the early fertilization is biased, the population development is too large, and the field showing the thick color of the leaves is not suitable for the application of the ear, so as to avoid the later maturity and late maturity, affecting the fruiting and reducing the yield, mainly adding the foliar fertilizer to increase the source. seed. The amount of panicle fertilizer should vary from day to day, flexible application, and strict control. If the ear development period is at high temperature or rainy weather, it should be applied less or not; in moderate temperature and strong light weather, it can be applied more appropriately. Generally, the flower-promoting fertilizer is applied with 3.5-4 kg of urea per mu, and is applied at the jointing stage; the flower-preserving fertilizer is used for 2.5-3 kg of urea per acre, and is applied in the middle of the young panicle differentiation.

In addition, hybrid rice requires more potassium than conventional rice, and the application of appropriate amount of potassium fertilizer at the booting stage of hybrid rice has an important role in promoting the formation and operation of carbohydrates. Nitrogen and potassium can better play the role of flower growth, weight gain and weight gain. effect. Mix 7.5-10 kg of potassium chloride with 10-15 kg of fine soil per acre and apply it in the absence of dew.

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