Enhancing cold resistance Generally, pre-winter weak seedlings need to be supplemented with organic fertilizers to win more rooted leaves before winter. For the long seedlings before winter, in the light snow to the winter solstice stage, the cultivator can turn the soil about 10 cm deep in the row of rapeseed, cut off the roots of the branches, reduce its nitrogen uptake capacity, and promote the accumulation of organic matter such as sugar in rapeseed plants to improve the cold resistance. ability. Pay close attention to rapeseed cultivating soil, to thicken the root soil layer, to block the cold wind invasion, improve the ability of endothermic insulation and cold resistance have a certain effect. Especially after the tall seedlings have cultivated earthworms, the shortening of roots and stems is conducive to keeping warm. When entering the winter season, especially in the case of cold invasion, it is necessary to control the application of available nitrogen fertilizer, which will help control the growth of rapeseed nutrition area and enhance the cold resistance of rapeseed.
Early application of wax fertilizer, heavy wax fertilizer to increase the amount of phosphorus and potassium fertilizer in the wax, can play a role in increasing the thickness of the wax layer of the blade. It is best to apply the wax fertilizer before the onset of the cold wave. In the early winter, additional organic fertilizer such as pig cow dung or earth miscellaneous fertilizer can be used to increase the ground temperature by 2°C~3°C. It is advisable to use 1000-1500 kilograms of pig cow manure or 2000-2,500 kilograms of miscellaneous fertilizer. Potassium can increase the cell fluid concentration and enhance the cold resistance of cells. In general, 5 to 8 kg of potassium chloride and 10 to 15 kg of superphosphate are applied to each acre of acre. Plant ash is rich in potassium and strong in heat preservation. When the weather suddenly becomes cold and other measures are too late to be implemented, a layer of grass and wood ash can be sprinkled on the leaves and fields of rapeseed, which can not only protect the leaves, but also increase the endothermic performance of the soil and increase the soil. temperature.
Foliar application of fertilizer fertilizer foliar foliar spray can significantly increase the thickness of foliar waxy layer, a significant effect of cold resistance. Generally due to the low temperature purple leaves, spraying phosphate fertilizer can be transformed into normal green color after 5 days, and can tolerate the low temperature of minus 5 °C invasion. The specific method is to use 2 kg of superphosphate or 0.5 kg of ternary compound fertilizer per acre. After soaking in 30-40 kg of water for one week, filter the fertilizer slag, spray the leaves, spray once every 7 days, and spray. The focus is on rapeseed fields where nitrogen fertilizer is too heavy to appear green. For lean rapeseed, 0.1 to 0.2 kg of urea can be added to the phosphate fertilizer to promote the growth of rapeseed blades to improve cold resistance.
Prevention and control of pests and diseases as soon as possible to prevent rape, aphids, cabbage caterpillars and other pests. Promote the robust growth of rape, can effectively improve its cold resistance. Generally, 80% of dichlorvos emulsion or 40% of dimethoate emulsion is sprayed with 1000 times per acre, and chrysanthemum oil, enemy killed, crystal trichlorfon and the like can also be used. Not only pests can be killed, but also control of aphids can be reduced. Locusts spread the risk of rape virus disease.
Early prevention, early flowering, early flowering, rapeseed with too early water, low fertilizer, and high density, rapeseed field with high temperature, degraded product, and late planting in winter are easy to appear early in the winter. Found that it should be immediately removed, and timely application of ammonium bicarbonate 10 to 15 kg (poured on water) to promote vegetative growth, inhibit reproductive growth, so that plants quickly increase leaves, accumulate nutrients, improve the ability of cold resistance, safe winter.
Early application of wax fertilizer, heavy wax fertilizer to increase the amount of phosphorus and potassium fertilizer in the wax, can play a role in increasing the thickness of the wax layer of the blade. It is best to apply the wax fertilizer before the onset of the cold wave. In the early winter, additional organic fertilizer such as pig cow dung or earth miscellaneous fertilizer can be used to increase the ground temperature by 2°C~3°C. It is advisable to use 1000-1500 kilograms of pig cow manure or 2000-2,500 kilograms of miscellaneous fertilizer. Potassium can increase the cell fluid concentration and enhance the cold resistance of cells. In general, 5 to 8 kg of potassium chloride and 10 to 15 kg of superphosphate are applied to each acre of acre. Plant ash is rich in potassium and strong in heat preservation. When the weather suddenly becomes cold and other measures are too late to be implemented, a layer of grass and wood ash can be sprinkled on the leaves and fields of rapeseed, which can not only protect the leaves, but also increase the endothermic performance of the soil and increase the soil. temperature.
Foliar application of fertilizer fertilizer foliar foliar spray can significantly increase the thickness of foliar waxy layer, a significant effect of cold resistance. Generally due to the low temperature purple leaves, spraying phosphate fertilizer can be transformed into normal green color after 5 days, and can tolerate the low temperature of minus 5 °C invasion. The specific method is to use 2 kg of superphosphate or 0.5 kg of ternary compound fertilizer per acre. After soaking in 30-40 kg of water for one week, filter the fertilizer slag, spray the leaves, spray once every 7 days, and spray. The focus is on rapeseed fields where nitrogen fertilizer is too heavy to appear green. For lean rapeseed, 0.1 to 0.2 kg of urea can be added to the phosphate fertilizer to promote the growth of rapeseed blades to improve cold resistance.
Prevention and control of pests and diseases as soon as possible to prevent rape, aphids, cabbage caterpillars and other pests. Promote the robust growth of rape, can effectively improve its cold resistance. Generally, 80% of dichlorvos emulsion or 40% of dimethoate emulsion is sprayed with 1000 times per acre, and chrysanthemum oil, enemy killed, crystal trichlorfon and the like can also be used. Not only pests can be killed, but also control of aphids can be reduced. Locusts spread the risk of rape virus disease.
Early prevention, early flowering, early flowering, rapeseed with too early water, low fertilizer, and high density, rapeseed field with high temperature, degraded product, and late planting in winter are easy to appear early in the winter. Found that it should be immediately removed, and timely application of ammonium bicarbonate 10 to 15 kg (poured on water) to promote vegetative growth, inhibit reproductive growth, so that plants quickly increase leaves, accumulate nutrients, improve the ability of cold resistance, safe winter.
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