What is the method for rice without heading?

1. Spraying gibberellin can promote heading, make the ear pull out in time within 2-3 days, and pollinate normally, which can effectively reduce the empty grain rate under the ear. Generally, 0-2g of 65438+920 (gibberellin preparation) and 50-60kg of water are sprayed per mu.

2. If the heading difficulty of rice in the field occurs in blocks, pay attention to spraying only these blocks and try not to spray the plants with normal heading, so as to avoid the last section of these rice plants being pulled out too long. Fixed-point spraying should master the dosage according to the actual spraying area to avoid excessive dosage in some areas.

3. Spraying Chunquan series foliar fertilizer, 0. 1% sodium humate, 1.5% potassium chloride and 2% urea solution can enhance the photosynthetic function of leaves and improve the seed setting rate.

Rice growth habit

1. Rice likes high temperature, high humidity and short sunshine, and has low requirements for soil, but paddy soil is the best. The lowest temperature of seedling germination is 10 ~ 12℃, and the optimum temperature is 28 ~ 32℃. The average daily temperature at tillering stage is above 20℃, and the optimum temperature for ear differentiation is around 30℃. Low temperature prolonged the differentiation of branches and glumes. The optimum heading temperature is 25 ~ 35℃. The optimum flowering temperature is about 30℃, lower than 20℃ or higher than 40℃, and pollination is seriously affected.

2. The relative humidity is 50 ~ 90%. The key period of fruiting is from panicle differentiation to full filling stage; The population with balanced nutritional status and high photosynthetic efficiency is of great significance to improve seed setting rate and grain weight. A lot of water and mineral nutrients are needed at heading and fruiting stage; At the same time, it is necessary to enhance the root activity and prolong the functional period of stems and leaves. It takes about 500 ~ 800 kg of water to form 1 kg of rice.