The jointing and booting stage is a period in which vegetative growth and reproductive growth of rice are simultaneously carried out. During this period, rice growth and development rapidly increase, the root group is the largest, the leaf area of ​​the rice plant reaches the maximum, and the rice ear begins to differentiate. The jointing of the ear is determined by the number of grains per ear. The key period is also the consolidation period of the effective number of pans per acre, and the decision period of grain weight. The main factor is the influence of external conditions.
Nutrient requirements
During the differentiation of young spikes, the root group is increasing, the leaves are growing out, and the nutrient demand is increased. If there is no nutrition at this time, it will have an adverse effect on the differentiation of young ears. Therefore, it is necessary to use panicle fertilizer, which is mainly based on potassium fertilizer, promotes early maturity, strengthens stems, and improves the lodging resistance of stems. Apply appropriate amount of nitrogen fertilizer to prevent late maturity.
Temperature requirement
The suitable temperature for panicle differentiation is 26°C-30°C, and the external temperature for panicle differentiation is 15°C-18°C, but the most sensitive period is meiosis (last leaf tip), high temperature, low temperature, both will be The normal development of flowers has a great impact, resulting in an increase in open space and ultimately affecting yield.
Water management
The differentiation of young spikes to heading is the most demanding period of rice in the whole life. At this time, the plants grow vigorously, the photosynthesis is strong, the leaf transpiration is the largest, so it can not be drought and water shortage, and the lack of water increases the agaric abortion and the increase of non-real particles. . However, it is not advisable to infuse deep water. Deep water affects root respiration and root development, forming black roots and rotten roots, and reducing root activity. Therefore, shallow water should be poured in the field of booting, and the water layer should be kept at 3-5 cm. It is not suitable for deep water irrigation.
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