Transplanting strong seedlings in rapeseed is better than transplanting big seedlings, mainly due to earlier planting time, higher temperature, easy rooting, vigorous growth, strong root system, strong absorptive capacity, favorable autumn hair, strong winter hair, and early hairiness. Branches for high yields. The core of high-yielding seedlings is planted at the right time. The rapeseed field is used to replant rapeseed in the field and put it in dry winter rice fields. The soil in the rice field is deep, and the water conservation and fertility are strong, and high yield of rapeseed can be obtained. Can rape early in the second half of September in early time sowing timely, so that seedling age 25-30 days early planted. Strong seedlings can be planted in rapeseed. Select early-maturing high-yield varieties such as Rongyou No. 3, Chuanyou 11, Noza No. 6, Zhongyou No. 5, Zhongyou No. 119 and other early-maturing, medium-maturing early-maturing and medium-maturing varieties; 2. Timely plowing and ploughing the rice soil gradually drain the field water. After the rice is harvested, the plow is ploughed or plowed in time to dig the soil. The soil is deep-turned to make the soil mature, breathable, and frothy, which is conducive to the growth of rapeseed. 3. Cultivate the main signs of strong seedlings in medium and strong seedlings: Transplanting seedling age 25-30 days, seedling height 15-18 cm, green leaves 4-5 pieces, roots and stems thick 0.5 cm, plant type dwarf, fibrous roots more, petiole Coarse and short, leaves clustered, leaf color normal, no red leaves, no disease, no tall seedlings and curved foot seedlings. Seedling technology points: (1) Choose a seedbed and sow at the right time. Select sand loam with convenient topography, flatness, soil fertility, looseness, drainage and irrigation as seedbeds, and leave at least 1:5 ratio of seedbeds and transplants. The medium-maturing seeds were planted on September 16-20, the early-maturing seeds were planted on September 21-25, and the early-maturing seeds were planted on September 26-30. (2) Fine soil preparation and application of base fertilizer. Seedlings in front of the seedbed for timely turning over and picking up weeds and pre-planting pockets. The soil blocks are finely sifted a few days before sowing. The base fertilizer is mainly organic fertilizer, and 20-30 kg of composted soil fertilizer per square foot seedbed is used. Calcium 0.3-0.4 kg, evenly spread into the seedbed before sowing, leveling the bed soil, so that the soil and fertilizer are fully mixed, and then press the 1.3 meters open box, the car ditch is 11-20 centimeters deep, depending on the seedbed soil wet and dry enough to throw water manure After sowing seeds, do not sprinkle seeds after the first splashing water manure, so as not to spill the seeds scattered uneven or fall into the earth seam, germination and the formation of weak seedlings. (3) Seed selection for seeding, spreading and spreading. Grab sunny days before sowing for 1-2 days, use 10% saline to select seeds, select the lower layer full of seeds, rinse with water and dry, reserve 10 grams per square foot seedbed, balance weighing, and sow to ensure Uniform sowing, sowing with plant ash mixed fine sand cover species. (4) Seedbed management, highlighting and grasping early. 1 early seedlings, Dingmiao. Seedlings of 1-2 true leaves when seedlings are removed, remove diseased seedlings to retain healthy seedlings, to weak seedlings to retain strong seedlings, to leave small seedlings to keep large seedlings, to miscellaneous seedlings, 3 true leaves when transplanted as soon as possible by the spacing of 6-8 cm Dingmiao. 2 early dressing, combined with seedlings, Dingmiao, weeding. Water manure plus a small amount of nitrogen fertilizer each fertilizer 1 times. 3 early insect protection seedlings. Seedling stage is mainly locusts, fleas, cabbage caterpillars, can be used to kill 2,500 times 2.5% enemy spray. Dehumidify or water in a timely manner.
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