The growth period of mid-season rice is generally 130~160 days. In the short-term high temperature weather, the growth period is shortened. The cultivation method of mid-season rice is also slightly different from that of early rice and late rice. Teacher Xiao Huizi has compiled some cultivation methods for mid-season rice, and hopes to help you. Medium rice planting method The cultivation of mid-season should pay attention to the three measures of sowing, insertion and fertilizer, which is the basis of high yield. 1. Sowing at the right time to master the temperature rhythm of the whole growth period. The sowing date of rice should exceed 12 °C in daily average temperature to ensure germination rate. It is also necessary to comprehensively consider the influence of low temperature chilling damage during the transplanting period. The average daily temperature before the heading stage is greater than 23 °C, in order to prevent normal flowering and fruiting, and avoid the high temperature or drought hazard during the heading and flowering period. Hybrid rice heading and flowering stage are sensitive to high temperature and low temperature. The average daily temperature is 25 °C ~ 28 °C, otherwise it will increase the open rate and decrease the yield. 2. Reasonable close planting and establishment of a high-yield group structure. Planting too dense and easy to take into groups is too luxuriant, mutual shade, easy to cause pests and diseases, and the rate of ear formation is reduced. Planting too thin, it is difficult to ensure high yield of effective ears. The reasonable planting density is generally: early planting of about 80,000 plantlets per mu, planting 80,000 to 100,000 plants per mu, and planting 10 to 120,000 plants per acre. 3. Rational fertilization and strengthening fertilizer and water operations. First, it is necessary to rationally allocate the proportion of base fertilizer and topdressing: when the proportion of base fertilizer is about 50%, the output increases with the proportion of base fertilizer. When the proportion of base fertilizer rises to 70%, the output will decrease. Because of the early fertilization, the medium term could not be stabilized, and the later fattening was early. On the other hand, if the base fertilizer is insufficient, too much depends on topdressing, and the seedlings are often unstable. In the middle and late stages, the population is large, the number of ineffective branches is large, and the empty grain is increased. The application of panicle fertilizer and foliar fertilizer in the middle and late stages can ensure that the ears are large and large. The specific fertilization methods are as follows: Base fertilizer : Sanning gold peptide can 25-10-16 compound fertilizer, humic acid 18-18-18, 20-12-10 rice special fertilizer 35~50 kg/mu, ammonium bicarbonate about 25 kg. Back to green tiller: After transplanting, it will take about 5~6 days to return to green, and about 10 days after transplanting, start new tillers. Therefore, it is necessary to return to the green tiller and topdressing. Within 7 days after transplanting, the application of urea is 10~12.5 kg/mu, and appropriate amount of zinc fertilizer can be added. 15 days after planting, you can see the seedlings supplemented once, about 5 kg per mu. Spike fertilizer: The field where the soil is leaking and the group is weak, the panicle fertilizer should be applied, and the urea should be applied 5~7.5 kg. In the early stage, the group grew well and the amount of application was reduced. Summary: Medium rice cultivation mainly pays attention to the influence of temperature on the planting process, and masters the rhythm of temperature to control the growth cycle. After reading the above three points for the analysis of mid-season cultivation, I believe that you can cultivate more scientifically during the planting process.
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Three key points of high yield cultivation of middle rice