Technical principle of post-fertilization in rice

With the evolution of varieties and the continuous improvement of rice production, the late growth stage of rice has received more and more attention.

Late fertilization of rice generally refers to fertilization during the period from 5 to 7 days before flowering to 10 days after flowering. It includes two kinds of application of fertilizer and equal fertilization conditions during this period of time to increase the application rate during this period of time. The application method can be applied by foliar spraying and spreading. In addition to increasing the proportion of nitrogen applied in the late growth stage, it is also necessary to increase the proportion of potassium applied. The results showed that increasing the proportion of nitrogen and potassium in the late growth stage was better than increasing the nitrogen application rate in both the physiological activity of rice plants and the increase of rice yield. In terms of fertilizer types, post-fertilization should also break through the traditional concept that rice is an ammonium-producing crop. Many studies have shown that the effect of applying NO3-N in the late postpartum period is significantly better than that of NH4-N. This is consistent with the intrinsic physiological condition of rice plants in the late growth stage of rice.
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