After emergence of rapeseed, it is necessary to pay attention to the following measures to promote early-onset strong seedlings before winter, on the basis of applying base fertilizer, cultivating strong seedlings, and timely transplanting.
First, the seedlings Dingmiao. Asked for early seedlings, dilute seedlings. The principle of mastering is to stay thin and thin, stay weak and strong, and adjust the distance between the plants to maintain uniformity. Generally divided into two seedlings, the first time when the first true leaf appears after the seedlings, and the leaves do not overlap. The second seedlings were carried out on the second true leaf, and the three-leaf stage seedlings were given.
Second, early application, Shizuo Miao Fei. Fertilization method should be based on the characteristics of seedlings need to gradually increase the amount of fertilizer, first light after the thick, from small to large, with the principle of quick-acting nitrogen fertilizer-based topdressing, fertilizer should account for about 40% of the total amount of fertilizer. The application method is based on the application of basal fertilizer, topdressing nitrogen fertilizer and other nitrogen fertilizers twice, in addition to topdressing rapeseed should be applied after the application of nitrogen fertilizer, it should be applied once again. Live rapeseeds should be topped with fertilizer once during the first seedlings and after seedlings. In the seedling stage, in addition to topdressing nitrogen fertilizers, attention should also be paid to the supply of phosphate fertilizers. In addition, 100-kilograms of 0.1-0.2% borax aqueous solution should be sprayed per acre.
Third, drought relief. The winter rain in China's winter rapeseed district is particularly cold in the Huanghuai District and the middle reaches of the Yangtze River. Autumn and winter are more arid. Therefore, the “winter water is the life of rape†is a farmland. When the relative humidity of the soil (ie, the maximum amount of water in the field) is less than 70%, the redness of the lower leaves, the dullness of the whole plant, or the wilting of noon leaves, it should be immediately irrigated, and drought resistance promotes early onset. The number of irrigation should be based on the seedling condition and the soil texture. The sandy soil has poor water retention performance, leakage is more, and it can be filled with more water. The clay has good water retention performance and can be filled with less water.
In areas and years where there is a lot of autumn rain, it is necessary to pay attention to the ditch. Lower the groundwater level to ensure that the Sangou (Sediment, Zhonggou, Weigou) trenches communicate with each other so that the rain will stay dry.
Fourth, cultivator loose soil. For live rapeseed, when two or three true leaves appear after the whole seedlings, the first cultivator is combined with the seedling top dressing, and after four or five true leaves, the second cultivator is combined with the fixed seedlings for the top dressing, and then cultivated before the low temperature comes. once. For transplanting rapeseed, the first cultivator should be used in combination with topdressing after the seedlings are returned to greening, and then 1-2 cultivators should be conducted before winter.
Fifth, pest control. The main pests of rape seedlings include cabbage caterpillars, aphids, yellow striped hops, and rapeseed pods. The main diseases are virus disease, white rust, and downy mildew. Three days before transplanting, it is best to completely and thoroughly use pesticides to prevent and treat all pests within the seedbed and not to bring them to Daejeon.
Six, weed control. Weeds were treated with pre-split treatment and stem and leaf treatment. Within 3 days after sowing of rapeseed, spray 60 kg/water of 60-70 ml of 76% Jindal EC or 100 ml of 50% butachlor EC per mu. To control monocotyledonous weeds, in the 3-5 leaf stage of weeds, 10.8% of high-efficient haloxyfop oil can be added to 30-40 milliliters of water and 40 kilograms of water per acre to evenly spray the liquid on the weeds.
Seven, control. The rapeseed was timely controlled after the 3-leaf stage and sprayed with 15% paclobutrazol wettable powder 40-50 g water and 40 kg per mu. Be careful not to increase the amount of paclobutrazol, and do not re-spray to prevent leakage. After applying paclobutrazol, the root neck of Brassica napus was thickened, the leaves were thickened, and the photosynthesis was enhanced. It was beneficial to improve the quality of rapeseed rape and enhanced the resistance to cold and stress of rapeseed.
First, the seedlings Dingmiao. Asked for early seedlings, dilute seedlings. The principle of mastering is to stay thin and thin, stay weak and strong, and adjust the distance between the plants to maintain uniformity. Generally divided into two seedlings, the first time when the first true leaf appears after the seedlings, and the leaves do not overlap. The second seedlings were carried out on the second true leaf, and the three-leaf stage seedlings were given.
Second, early application, Shizuo Miao Fei. Fertilization method should be based on the characteristics of seedlings need to gradually increase the amount of fertilizer, first light after the thick, from small to large, with the principle of quick-acting nitrogen fertilizer-based topdressing, fertilizer should account for about 40% of the total amount of fertilizer. The application method is based on the application of basal fertilizer, topdressing nitrogen fertilizer and other nitrogen fertilizers twice, in addition to topdressing rapeseed should be applied after the application of nitrogen fertilizer, it should be applied once again. Live rapeseeds should be topped with fertilizer once during the first seedlings and after seedlings. In the seedling stage, in addition to topdressing nitrogen fertilizers, attention should also be paid to the supply of phosphate fertilizers. In addition, 100-kilograms of 0.1-0.2% borax aqueous solution should be sprayed per acre.
Third, drought relief. The winter rain in China's winter rapeseed district is particularly cold in the Huanghuai District and the middle reaches of the Yangtze River. Autumn and winter are more arid. Therefore, the “winter water is the life of rape†is a farmland. When the relative humidity of the soil (ie, the maximum amount of water in the field) is less than 70%, the redness of the lower leaves, the dullness of the whole plant, or the wilting of noon leaves, it should be immediately irrigated, and drought resistance promotes early onset. The number of irrigation should be based on the seedling condition and the soil texture. The sandy soil has poor water retention performance, leakage is more, and it can be filled with more water. The clay has good water retention performance and can be filled with less water.
In areas and years where there is a lot of autumn rain, it is necessary to pay attention to the ditch. Lower the groundwater level to ensure that the Sangou (Sediment, Zhonggou, Weigou) trenches communicate with each other so that the rain will stay dry.
Fourth, cultivator loose soil. For live rapeseed, when two or three true leaves appear after the whole seedlings, the first cultivator is combined with the seedling top dressing, and after four or five true leaves, the second cultivator is combined with the fixed seedlings for the top dressing, and then cultivated before the low temperature comes. once. For transplanting rapeseed, the first cultivator should be used in combination with topdressing after the seedlings are returned to greening, and then 1-2 cultivators should be conducted before winter.
Fifth, pest control. The main pests of rape seedlings include cabbage caterpillars, aphids, yellow striped hops, and rapeseed pods. The main diseases are virus disease, white rust, and downy mildew. Three days before transplanting, it is best to completely and thoroughly use pesticides to prevent and treat all pests within the seedbed and not to bring them to Daejeon.
Six, weed control. Weeds were treated with pre-split treatment and stem and leaf treatment. Within 3 days after sowing of rapeseed, spray 60 kg/water of 60-70 ml of 76% Jindal EC or 100 ml of 50% butachlor EC per mu. To control monocotyledonous weeds, in the 3-5 leaf stage of weeds, 10.8% of high-efficient haloxyfop oil can be added to 30-40 milliliters of water and 40 kilograms of water per acre to evenly spray the liquid on the weeds.
Seven, control. The rapeseed was timely controlled after the 3-leaf stage and sprayed with 15% paclobutrazol wettable powder 40-50 g water and 40 kg per mu. Be careful not to increase the amount of paclobutrazol, and do not re-spray to prevent leakage. After applying paclobutrazol, the root neck of Brassica napus was thickened, the leaves were thickened, and the photosynthesis was enhanced. It was beneficial to improve the quality of rapeseed rape and enhanced the resistance to cold and stress of rapeseed.
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