First, choose good breeds. It is best to use high-quality, high-product varieties that have been approved by the Regional Varietal Approval Committee. Such as: Ningshu No. 43, Ningshu No. 27 and so on. Second, fixed Putian, fertilizing Putian. The sheds built this year are best grown with vegetables or soybeans. Do not disassemble and do not grow high-efficiency crops such as corn. To lay a good foundation for early childbirth in the second year. Third, early childbirth, laying a good foundation for early transplanting. Fight for the end of the childbirth before April 15 and the transplant till May 20. Third, do a good job of seed disinfection and soaking work. 1, drying seed: choose sunny rice seed shop 5-7 cm thick, drying 1-2 days. 2. Seed selection: Use salt water or muddy water with a specific gravity of 1.10 (to make the fresh eggs surface to the size of a 2 cent coin) for selection. Remove the cereals and rinse the seeds with water. 3. Disinfection: The selected rice seeds will be sterilized for 3 days (72 hours) with “100 grams†of 1:4000 solution to prevent bakanae disease in rice. 4. Soaking: The disinfected seeds should be washed with fresh water, soaked in fresh water at 10°C for 5 days, and then changed once a day to make the seeds absorb enough water. 5, germination. Remove the soaked seeds in a sack and place in a warm place to maintain germination at 30-32°C until 80% of the seeds break the chest and whiten. Fourth, in strict accordance with the rules of production of nutritious soil. Choose 3 light saline-alkali, dry grassland-free dry land to screen 3 parts of fine soil and 1 part of the substrate, add a bag of breeding seedlings to each side, mix and mix evenly, and suffocate for 5-7 days to fully absorb fertilizer and soil. Fifth, sowing and sowing. Before sowing, the soaked rice seeds can be sown by spreading them to a loose state. Each dish sowed 130-140 grams of rice. Sixth, bed soil disinfection. Each ml of transplanting spirit, watered 1-1.5 kg, poured seedlings disc soil. Soil disinfection to prevent rice seedling blight. Seven, weeding field. After placing a plate, use 0.2% of 50% herbicidal emulsion per square meter, spray 100 times with water, and control the weeds in Putian. 8. Putian management. Seed management is divided into four periods. 1, sowing to emergence. Management objectives: Insulation and moisturizing to ensure cleanliness. The temperature in the booth is 30-32°C. When the temperature exceeds 35°C, the ventilation is reduced to prevent the high-temperature steaming. Seedlings and air humidity are mainly sprayed to ensure that the cover soil is moist, and the top cover of the soil is covered to ensure rice emergence. 2, out of Qimiao to a leaf. The management objective is to control the temperature and moisturize and promote the normal growth of the roots. The temperature in the booth is controlled at 25-28°C. When it is over, the membrane port is opened. Usually 3-5 days after sowing, when the seedlings see green, they begin to pass a small breeze, open at 11 noon and close at 3 pm. Found that there is a top cover and dew seed, timely use of sticks to cover and make up soil. Reduce the number of water sprays after emergence, do not spray water. The root length of the seedlings managed in this period is twice as high as the seedling height. Rice seedlings are planted in one heart and one heart, transplanting spirits per milliliter, watering 1-1.5 kilograms, and watering seedlings. Soil disinfection to prevent rice seedling blight. 3, one leaf to one heart. Management objectives: Control water temperature, promote rooting and prevent leggy. The temperature in the booth is controlled at 20-25 °C. The film is opened before sunrise and the air outlet is closed at 4 pm. Open two hours of ventilation at noon on cloudy days. When the temperature is lower than 10°C, the ventilation time should be shortened and the vents should be closed earlier. Do not ventilate for a long time so as to avoid cold damage to the seedlings and physiological obstacles. If there is not enough ventilation during this period, the temperature is high, and the humidity is high, forming leggy seedlings and easy to get blight. 4, two leaves one heart to transplanting. Management Objectives: Promote growth and promote leaf growth. During this period of temperature within 20 °C, gradually increase the ventilation, so that the seedlings gradually close to the temperature outside the greenhouse, at night when the temperature is greater than 12 °C ventilation day and night. After entering the two-leaf and one-heart period, the amount of evaporation is large, the physiological water requirement increases, and it is prone to lack of water. The number and time of water sprays must be increased. Disposable Quilt Covers,Disposable Sterile Quilt Covers,Disposable Non Woven Quilt Covers,Disposable Non Sterile Quilt Covers Henan Xianghe Medical Materials Co., Ltd. , https://www.xiangheweicai.com