Paddy fields with direct seeding cultivation techniques
1, select the fine varieties, suitable early sowing, control its symbiotic period. High-quality and good seeds are the basis for high yields. At present, the oil refineries No.7 and No.8 and Suyou No.1 promoted in our district have good yield, stable yield, and adaptability. They are ideal varieties for direct-set rapeseed, and are suitable for early sowing. Equal seeding is a key measure for direct seeding and early seedling seedlings. The seeding period of live rapeseed is limited by the length of rice growth period. To sow early, it is necessary to arrange the early rice varieties in production, and to make a reservation before October 25 to ensure that the sowing date does not exceed October 20 to ensure rice The symbiotic period does not exceed 5 days. Postponed sowing, the accumulated temperature decreased, and the small amount of growth before winter, the yield was affected. If the symbiosis period of live rapeseed and rice is more than 5 days, due to high temperature, good humidity and poor lighting conditions, it is easy to form high seedlings and neck seedlings. Reduced, vulnerable to frost damage. 2, strengthen management. (1) Ditching and anti-staining, cultivating rape seedlings with small roots and shallow, not resistant to waterlogging, if the field water accumulation, it is easy to cause dead shoots to form stiff seedlings, affecting the rate of seedling formation. Therefore, it is necessary to open a ditch system in time after smashing to prevent excessive rain in autumn and winter, resulting in waterlogging and affecting root development. (2) and time seedlings, Dingmiao. The number of seeded acres of live broadcast rapeseed is controlled at about 0.25 kilograms. After the loss of the ditch and mud, the number of seedlings in the field will not exceed the predetermined number of acres. In large-scale production, the number of sowing is too large, resulting in oversized groups and declining individual qualities. For this part of the plot, we must timely prepare the seedlings and seedlings. Generally, after the four-leaf period, press the “four to four stays†to stay in thin and thin, to stay small, to leave the poor, to stay weak and stay strong. , Leave a predetermined number of plants, generally 1.5-2 million per acre. 3, a reasonable fertilization to ensure strong seedlings, seedlings, improve the overall quality of seedlings. To plant rapeseed by sowing and sowing, seedling mix urea 10 kg/mu or compound fertilizer 15 kg/mu. After the rice is harvested, early Miaofei should be applied to fight for early-onsets. The time should not exceed the beginning of November. Basal fertilizer plus Miaofei, the amount of application accounted for more than 50% of the total amount of rapeseed life, re-application of the moss fertilizer, the general application of urea 15-20 kilograms, so that the coating of wax, guarantee strong spring hair, generally in early February supplement Fertilizer. Looking ahead, not only to prevent off force, but also to ensure a steady spring, mu 5-8 kg of urea, bolting after flowering early according to the seedlings, can be appropriate to apply showering fertilizer to promote balance, reduce degradation, reduce empty grains, improve grain Yield. The flowering period combined with the control of sclerotia, 50 grams per acre sprayed active ingredients to prevent premature aging, in order to increase seed-setting rate and 1000-grain weight. 4, timely control of pests and weeds cultivating rapeseed general weeds high base, and weeds and rape growth synchronization, easily cause grass damage, control of grassland damage to chemical control, generally around November 20, rape 4 leaves Above, after the peak of the grass, spraying and killing in addition to eliminate, can effectively prevent weeds harm, in addition, the cultivating rapeseed large group, Yu Yu heavy, pests and diseases than the transplanted field weight, the main control of two locusts and twice Sclerotinia, seedling stage and the initial stage of node angle can be seen as the occurrence of locusts in the field. Each control is controlled once, and each sclerotinia is controlled at the early flowering stage and full flowering stage.