Key Techniques of Hybrid Rape Seed Management
The cultivation of age-appropriate seedlings is the basis for the high yield of hybrid rapeseed. To cultivate age-appropriate seedlings, we must pay close attention to the management of rape seedbeds and seriously implement the following technical measures: 1, and time seedlings, Dingmiao: hybrid rape seedlings grow fast, if not time seedlings easily form a large number of tall seedlings, curved root seedlings, resulting in poor quality seedlings, fewer branches, low yield. The frequency of seedlings should generally be 3 times. The first time after the seedlings were established, a few clustered seedlings were removed; the second one was carried out after the second true leaf was born. Between the weak seedlings, the young seedlings, the diseased seedlings and the hybrid seedlings, the leaves did not overlap and the seedlings did not grow. Rely on seedlings and remove weeds at the same time. After the third true leaf grows, the third time the seedlings and the seedlings will be planted. The principle of “four to four stays†shall be implemented. That is to stay strong and weak, to stay thin, to stay healthy, to stay small to stay large . Pull out the long-necked seedlings, clustered seedlings, fall pit seedlings, leafless seedlings, tall seedlings, diseased leaf seedlings, insects seedlings; leave short-necked seedlings, leafy seedlings, collapsed seedlings, vigorous growth strong seedlings. The density of seedlings is determined according to different ages and different varieties. Generally, about 35 days old seedlings are planted with 13 to 15 strains per square foot, basically guaranteeing 8-10 million strong seedlings per acre seedbed. 2, scientific fertilizer: seedlings grow the first true leaf can be combined with the drought with the appropriate amount of decomposing thin manure or 0.5% of the urea water pouring. 2-3 leaves applied 1 time to raise the seedlings, per acre seedbeds cooked and thinned 15 tons of human or animal manure water or about 5 kg of urea poured into water. Seedlings were transplanted before the seedlings, and then applied for 1 additional time to send fertilizer. 3. Moderate watering: In order to promote seedlings, care should be taken to keep the surface wet. After planting, it is best to use shades of grass to shade 2-3 days. However, the seedlings should be removed in time to allow the sun to grow and thrive. Rape seedling watering time to do a small amount of ground pouring. The combination of water and fertilizer in the middle and less pouring in the later period ensures that the seedbed is moist and the seedlings grow steadily. 4, pay attention to the prevention and control of pests: rape seedlings of the main insect pests are vegetables, cabbage caterpillars. The cabbage caterpillars are prone to occur during prolonged periods of rain, and can be controlled by spraying 2% of avermectin 35-50 g or 5% of Alkali salt 10 g water 50 kg per acre. When the weather is long and clear, it is prone to locusts, and can be sprayed with 25% pymetrozine 20-25g watered 50kg evenly sprayed or 2.5% enemy emulsion emulsion 3000 times liquid sprayed on the back of the plant and the back of the leaves per acre seedbed. Diseases at the seedling stage mainly include viral diseases, and 40% carbendazim or 70% mancozeb zinc 75-100 ml per mu is sprayed on the water. 5. Chemical regulation: When the rape grows to the three-leaf stage, use 15% paclobutrazol (50 grams per gram) or 20 grams of uniconazole in the per acre seedbed, spray evenly with 50 kilograms of water, and do not spray repeatedly. After application of paclobutrazol, the rapeseed plant height became shorter, the root neck became thicker, and the leaves became thicker and the photosynthesis was enhanced. It was beneficial to improve the quality of rapeseed and enhance the resistance to cold and stress of rapeseed. 6, timely transplanting. Rape seedlings reach the age of 30 days or so should be created as early as possible to plant conditions to facilitate early hair. When transplanting, it is necessary to use “three beltsâ€, that is, to bring in the marrying fertilizer (see the seedling application 1 week before transplanting, and the force is not colored); take the medicine (mainly treat the insecticide); soil (overnight seedlings pouring) Foot water, which makes the vegetable pot more home soil, promotes early survival and early emergence of seedlings after transplanting. Rice Transplanter,6 Rows Rice Transplanter,Walking Rice Transplanter,Efficient Manual Rice Transplanter Taizhou Yingtian Agricultural Machinery Manufacturing Co., Ltd. , https://www.sakuradaagc.com