Timely planting and reasonable dense planting techniques for high-quality rice

According to the climatic conditions in different regions and the characteristics of the maturity of rice varieties, the appropriate sowing date and transplanting period should be determined to ensure that the climatic conditions of rice in heading grain filling stage are in the best state. According to the influence of planting density on the quality of rice consuming, proper thinning and wide-row cultivation will not only help improve the appearance quality and taste of rice, but also help to improve the microclimate in the field, reduce the occurrence of pests and diseases, and reduce the use of pesticides. Pollution, improve the health of rice. The transplant density varies with the transplantation method and the state of the soil.

According to the timely planting of the cultivar's growth period, early rice grouting can avoid the influence of high temperature and improve the quality of rice. The late rice can avoid the influence of low temperature in September, making it safe to ear. The climatic and ecological conditions during the grain filling period have a great influence on rice quality and yield, of which the average daily temperature is the most significant. With the delay of sowing, the numerical changes of daily average temperature, maximum daily temperature, sunshine duration, and total daily radiation during maturation were low and high, and the relative humidity was the opposite. The corresponding quality of rice traits also showed regularity. Changes, such as changes in milled rice rate and gel consistency, were low and high, and changes in the amylose and chalky rice rates were high and low, and the 1000-grain weight decreased as the temperature during the grain-filling period increased. The average daily temperature during the grain-filling period mainly affects the ratio of whole polished rice, grain weight, chalky rice, chalkiness, protein content and gelatinization temperature. Different varieties have different sensitivity to temperature, but there are optimum temperatures for whole head rice rate and grain weight formation. Japonica rice is slightly lower than japonica rice, late rice is lower than middle rice, and middle rice is lower than early rice.

Diluted seeding, uniform seeding and cultivation of strong broth, laying a foundation for high-yield seeding and seeding is one of the key measures for good quality and high yield cultivation. The general seeding rate is controlled at about 225 kg/hm2 (Honda seed amount is 60~75kg/hm2 for conventional seed, 22.5~30kg/hm2 for heterogenic seed), and Putian can spray 300mg/kg paclobutrazol at the time of one leaf burden. For the delivery, attention should be paid to the prevention and control of pests and diseases; at the same time, reasonable application of basal fertilizers, weaning fertilizers, and marrying manures should be done in order to facilitate the development of a strong and prosperous population. When the seedlings grow to 5-6 leaves, or about 30 days of seedling age, the seedlings can be transplanted. Generally speaking, it is better to grow high-quality rice with a narrow row of plants (row spacing is 13.3cm20cm) and east-west direction. Insert 300,000 bushes per hm2, insert 3 to 4 grains per cluster, and 1 to 2 grains of miscellaneous grains in order to ensure the number of basic seedlings per hectare to reach the expected number of effective panicles.

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