Variety selection of paddy field, no-tillage direct seed oil rape should be selected "two-line" or "three-line" hybrid quality and high yield of "double low" rape, such as Xiangza miscellaneous oil No. 1, Xiangza oil No. 2, Xiangza oil No. 3, Xiang miscellaneous oil No.15, Zhongza Oil No. 2, Zhongza No. 11 and other high-yield and high-quality varieties.
After the late rice is harvested, the tillage method chooses a higher level of soil fertility and better drainage and irrigation conditions. The paddy field with sandy soil is no-tillage for rape cultivation. Open the ditch by 2 meters, the ditch is 25 centimeters wide and 15 centimeters deep, so that the "three ditch" is matched with the box, waist, and enclosure. The mud in the ditch is leveled on the center of the box, and then 20% of the spray is applied per acre. Trace 250 ml plus deep ploughing soil conditioner 13 grams of 50 kg of water spray, eradicate the weeds, loosen the soil. Apply 20 to 25 kg of rapeseed compound fertilizer plus 1 kg of boron fertilizer, or 40 to 50 kg of phosphate fertilizer, 7 kg of potassium chloride, and 1 kg of borax as base fertilizer.
Sowing date and sowing amount can be planted safely before October 25th in rapeseed in the main producing area of ​​double cropping rice. Early sowing can make full use of the higher temperature in the early stage. Seeds grow faster, grow faster, have more leaves and large plant groups, which can effectively inhibit the growth of weeds. In the later period, more main inflorescence results can be used to obtain high yields. Therefore, rapeseed - double cropping system of double-cropping rice, no-tillage rapeseeds best arrangement of early and mid-maturing varieties, late-maturing varieties sowed before October 20 as well, suitable sowing date for October 10 to 15 days. The seeding capacity of live rapeseeds per acre is 200-250 grams. When seeding, it is required to evenly dilute sowing, and timely cover rice straw after sowing to prevent soil moisture from evaporating. The thickness of rice straw must be thick and thin, and the thickness of rice straw must affect seedling emergence. If uneven seeding or emergence is not uniform, it can be used to make up for 19,000 to 20,000 plants per mu.
Scientific top-dressing, no-tillage, direct seed oil rape due to short growth period, small seedlings, little green leaves, based on the application of base fertilizer, should be followed by Miaofei, bud Feifei. Miao Fei usually applies 10-15 kilograms of urea per acre; in late December, it applies 10-15 kilograms of urea as wax fertilizer [overwintering fertilizer]; in late January or early February, Miao Shilei will be treated with fertilizer. Generally, urea is applied. 2.5 kg or spray foliar fertilizer, high-energy red potassium, boron fertilizer, or Shuofeng 481 plant growth regulators, coordinate vegetative growth and reproductive growth, ensure strong seedlings before winter, early spring, prevent premature aging Or late greed.
Weed control prevents weeds from being the key to high-yielding rapeseed direct seeding. After the late rice is harvested on the basis of weeding and weeding, we consider the weeds in the field. After the rape seedlings are established, we can use 45 grams of water per acre in the second leaf stage of the grass weeds (see Acacia) 35 to 40 Kilogram spray. Can also be used to control grass weeds.
Pest prevention and control No-tillage Direct seed oil rape Due to the high planting density, it is easy to induce sclerotial sclerotia. They should be sprayed with 50% carbendazim or thiophanate 100 g water 40-50 kg at the beginning and final flowering stages, respectively. At the same time, due to the late growth of rapeseed in the Yangtze River basin, with more rainy days and higher soil moisture, it is necessary to pay attention to clearing drainage, prevent water accumulation in the field, increase root activity, prevent premature decline of rapeseed, and promote high-yield harvest.
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