At present, the earliest rice in our land is about to be eared, the middle and late rice have already ended tillering, and the north is also entering the high temperature and rainy season. The fertilizer and water management in this period has a great influence on the yield of rice. The following points should be managed:
The management of fertilizer and water from heading to flowering stage
First, in terms of fertilizer management:
Phosphorus and potassium fertilizers should pay attention to supplement, to avoid partial N fertilizer, in order to prevent leggy, in order to reduce the occurrence of pests and diseases.
Second, in terms of water management:
The heading period is generally shallow water irrigation. The existence of the water layer in addition to directly meet the physiological needs of water, mainly to adjust the soil temperature and increase air humidity. Loss of water will weaken photosynthesis. If rice is exposed to high temperatures and long-term rain at the heading stage, there will be more empty grains.
Therefore, during this period, do not cut off water. The heading and flowering stage is a sensitive period in physiological water demand of rice. In this period, water shortage will make pollen and pistil stigma wilted by drought and heading difficulties. It will not bloom and pollinate and form empty granules, and can easily cause root and leaf premature aging. This stage should maintain about 5 cm of water. The north is in the flood season. In case of heavy rainfall in the fields, pay attention to drainage.
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