Ten measures for cotton seedlings
First, a fine land preparation, prepare enough at the end. Waterland cotton fields and wheat sets of spring cotton should be poured well at the end of the water, every 667 square meters of water consumption of 40 to 60 cubic meters; dry land, early application of farmyard manure early, rain is the case of flood, see through the water. To achieve ground breaking, the virtual reality. To achieve ground-level soil broken, virtual reality, no root weeds. Second, apply sufficient fertilizer, nitrogen control phosphorus. A cotton field producing 75 kg to 100 kg of lint per 667 m2 is applied to a 100-farm manure based on a N:P ratio of 1:0.8:0.6, applying 8 kg of pure nitrogen per 667 m2 to 10 Kg, pure phosphorus (P2O5) 6 kg to 8 kg, potassium sulfate 10 kg. Phosphorus and potassium fertilizers were used as a one-time base fertilizer. The nitrogen fertilizer application was applied at 1/3, and budding and flowering were applied at the rate of 2/3. Third, the size of the row configuration to ensure the density. Water field cotton field big line width 60-67 centimeters, small line width 40-45 centimeters, leave 5500-6000 strains per 667 square meters; Dryland cotton field and other row planting, line width 50-55 centimeters, every 667 square meters Liumiao 7000 ~ 8000 strains, wheat spring cotton spacing 40 ~ 45 cm, wheat cotton field distance can not be less than 30 cm, 4000 seedlings per 667 square meters. Fourth, select the best species, select the leaching. In the water cotton area, good varieties with high yield and insect resistance can be selected, such as Jinmian 26, U.S. 33D, Jinmian 12, Zhongmian 19, etc.; Hilly dryland cotton area can be selected with cotton 16 and Jinmian 19; Liao cotton early maturing varieties were selected. And do a good selection of sun seeds. Pre-planting cotton seeds are soaked in a cool, warm water for 10 to 12 hours. After spreading, they are spread to white hair, and then seeded by 1% of the seedling to prevent seedling diseases. Fifth, appropriate sowing, promote early-onset seedlings. The local temperature reaches 10 to 11°C. The mulching film covers the cotton field before and after the "Qingming." It is sown before and after the frost and blooms after the frost. The open field and the wheat spring cotton are planted before and after April 10 to reach the frost before sowing. After the emergence of seedlings, fighting seedlings early hair, nurturing strong seedlings. Six, mulching, drought seeding. Plastic film cover can increase the temperature and raise the moisture, protect the early growth of seedlings. In the cotton field where the bottom of the foot is bad, the first step is to cover the hole and sow; the dry field is used to drill the holes. Seven, control the amount of broadcast, pay attention to broadcast depth. Drilling is controlled at 4 kg to 6 kg per 667 m2; seedlings are planted at 1.5 kg to 2 kg per 667 m2. Depth 4 to 4.5 cm. Eighth, chemical weeding saves time and effort. Per 667 square meters with 48% trifluralin EC 50 ~ 75 ml, 40 kg ~ 50 kg of water, sprayed on the ground before sowing, immediately simmer, or after sowing with acetochlor, narrow rows of spray, and then covered. Nine, diligent and diligent, strengthen management. Covering the cotton fields to protect the membranes and laminating membranes, exposing the fields to rain in time and breaking the board, cultivating loose soil, and when the ground temperature is low, deep-middle-cultivation and boring cultivation are required to increase the ground temperature. Tenth, timely release seedlings to avoid hot seedlings. When the maximum temperature reaches 25 °C, the temperature below the membrane exceeds 50 °C, there may be hot sprouts. Should be timely to listen to weather forecast, put seedlings in time, Fangmiao principle: enlarge not put small, put green not put yellow, sunny avoid noon, cloudy surprise.