Since November 10, many provinces have cooled down blizzard several times. The heavy rainfall that comes early is not good for the growth of crops, and its possible impacts and scientific responses are described by crop type as follows:
First, vegetable crops. For the wintering Chinese cabbage in the Yellow River Basin, it is necessary to clean, remove and cover the snow in time. For spinach and pakchoi in the open winter leafy vegetables, it is necessary to take measures to keep warm and prevent cold in time. In areas where winter storage of Chinese cabbage is seriously damaged, the production of fast leafy vegetables and sprouts is arranged, and seedlings in protected areas are well prepared. For the management of unpressed greenhouse vegetable fields, firstly, clear the snow on the top of the greenhouse, adopt appropriate ventilation and heat preservation measures to prevent the inhibition of vegetable growth after cloudy days; second, control the water to control nitrogen, prevent cucumbers and tomatoes. Wait for the dishes to grow and weak. Therefore, the north to strengthen the production of protected areas to compensate for the damage to the production of vegetables in the open field.
Second, winter wheat. From the north of China to the middle and lower reaches of the Yangtze River, the impact of the early arrival of heavy snow on the wheat field mainly caused the wheat seedlings to appear weak and less tiller. In the wheat field after heavy snow, there is generally no need to pour frozen water. In the spring of the next year, it is necessary to pour back the green water early and return to the green fertilizer early, so as to achieve the purpose of early rejuvenation.
For the wheat in the Yangtze River Basin, such as Hubei, Sichuan, Anhui, Jiangsu and other places, rain and snow are not conducive to the emergence of wheat in the wheat field, should pay attention to drainage loose soil, diligently plan to promote root development. Under the condition that the temperature of the low temperature soil is high, it is easy to spread the rust, and it is necessary to prepare for prevention and treatment as early as possible. Some wheat varieties that are early sowing wheat and weak in winter are weak in seedling stage due to low temperature in heavy snow, and there may be widespread yellow seedlings. First of all, do not fertilize the yellowed wheat seedlings, especially do not apply more nitrogen fertilizer. The current problem of weak seedlings is that the root system is poorly developed and the nutrient absorption capacity is very poor. In order to rejuvenate the wheat seedlings, it is necessary to start from the roots and remove the wet and non-ventilation problems of the soil to promote root development and rejuvenation of the wheat seedlings. To this end, it is necessary to adopt soil cultivation measures, such as clearing ditch, loosening soil, and withdrawing to achieve the purpose of ventilation and warming. Only in the farmland where the bottom fertilizer is not really lacking nutrients, if necessary, the phosphorus and potassium fertilizers can be applied in combination with the cultivated loose soil, and a small amount of nitrogen fertilizer is applied at the same time. The role of phosphorus and potassium fertilizer is to promote the roots of wheat seedlings and improve the cold resistance of crops. It is best to cover the "warm dung" to protect and prevent freezing. Covering materials such as rice bran, broken straw, grass ash, peat and other organic fertilizers, these materials can also be used to change soil after being decomposed and ploughed into the soil.
Third, fruit trees. In order to alleviate the adverse effects of rain and snow on the growth of fruit trees, first of all, in the orchard that has been covered by heavy snow, first remove the snow on the branches in time to prevent the snow from crushing the branches, and at the same time, be careful not to cause the trees to suffer Secondary damage. Then use straw straw to wrap the trunk and cover the tree tray for heat preservation; in the nursery, cover the straw and film in a large area. For late-maturing orchards that have not yet been picked, timely remove the snow and thin ice from the fruit area to prevent frostbite on the fruit surface and harvest as soon as possible. Second, for frozen fruit trees such as citrus trees, after the temperature rises steadily after snow, timely trimming is appropriate. Take measures to remove small leaves, slug pruning, and large wounds. When the branches are intact and the leaves are not dry, artificially assisted defoliation is carried out as soon as possible; the branches and stems that are obviously frostbite are trimmed in time. The cuts accurately control the wound and are protected by waxing. For frozen dead fruit trees, we should remove them as soon as possible and replant new seedlings. In short, the management of the cultivation of snow-stricken gardens is mainly to cultivate soil, apply organic fertilizer, and bundle tree insulation.
(Senior Consultant of Sinofert, Professor of China Agricultural University Cao Yiping)
First, vegetable crops. For the wintering Chinese cabbage in the Yellow River Basin, it is necessary to clean, remove and cover the snow in time. For spinach and pakchoi in the open winter leafy vegetables, it is necessary to take measures to keep warm and prevent cold in time. In areas where winter storage of Chinese cabbage is seriously damaged, the production of fast leafy vegetables and sprouts is arranged, and seedlings in protected areas are well prepared. For the management of unpressed greenhouse vegetable fields, firstly, clear the snow on the top of the greenhouse, adopt appropriate ventilation and heat preservation measures to prevent the inhibition of vegetable growth after cloudy days; second, control the water to control nitrogen, prevent cucumbers and tomatoes. Wait for the dishes to grow and weak. Therefore, the north to strengthen the production of protected areas to compensate for the damage to the production of vegetables in the open field.
Second, winter wheat. From the north of China to the middle and lower reaches of the Yangtze River, the impact of the early arrival of heavy snow on the wheat field mainly caused the wheat seedlings to appear weak and less tiller. In the wheat field after heavy snow, there is generally no need to pour frozen water. In the spring of the next year, it is necessary to pour back the green water early and return to the green fertilizer early, so as to achieve the purpose of early rejuvenation.
For the wheat in the Yangtze River Basin, such as Hubei, Sichuan, Anhui, Jiangsu and other places, rain and snow are not conducive to the emergence of wheat in the wheat field, should pay attention to drainage loose soil, diligently plan to promote root development. Under the condition that the temperature of the low temperature soil is high, it is easy to spread the rust, and it is necessary to prepare for prevention and treatment as early as possible. Some wheat varieties that are early sowing wheat and weak in winter are weak in seedling stage due to low temperature in heavy snow, and there may be widespread yellow seedlings. First of all, do not fertilize the yellowed wheat seedlings, especially do not apply more nitrogen fertilizer. The current problem of weak seedlings is that the root system is poorly developed and the nutrient absorption capacity is very poor. In order to rejuvenate the wheat seedlings, it is necessary to start from the roots and remove the wet and non-ventilation problems of the soil to promote root development and rejuvenation of the wheat seedlings. To this end, it is necessary to adopt soil cultivation measures, such as clearing ditch, loosening soil, and withdrawing to achieve the purpose of ventilation and warming. Only in the farmland where the bottom fertilizer is not really lacking nutrients, if necessary, the phosphorus and potassium fertilizers can be applied in combination with the cultivated loose soil, and a small amount of nitrogen fertilizer is applied at the same time. The role of phosphorus and potassium fertilizer is to promote the roots of wheat seedlings and improve the cold resistance of crops. It is best to cover the "warm dung" to protect and prevent freezing. Covering materials such as rice bran, broken straw, grass ash, peat and other organic fertilizers, these materials can also be used to change soil after being decomposed and ploughed into the soil.
Third, fruit trees. In order to alleviate the adverse effects of rain and snow on the growth of fruit trees, first of all, in the orchard that has been covered by heavy snow, first remove the snow on the branches in time to prevent the snow from crushing the branches, and at the same time, be careful not to cause the trees to suffer Secondary damage. Then use straw straw to wrap the trunk and cover the tree tray for heat preservation; in the nursery, cover the straw and film in a large area. For late-maturing orchards that have not yet been picked, timely remove the snow and thin ice from the fruit area to prevent frostbite on the fruit surface and harvest as soon as possible. Second, for frozen fruit trees such as citrus trees, after the temperature rises steadily after snow, timely trimming is appropriate. Take measures to remove small leaves, slug pruning, and large wounds. When the branches are intact and the leaves are not dry, artificially assisted defoliation is carried out as soon as possible; the branches and stems that are obviously frostbite are trimmed in time. The cuts accurately control the wound and are protected by waxing. For frozen dead fruit trees, we should remove them as soon as possible and replant new seedlings. In short, the management of the cultivation of snow-stricken gardens is mainly to cultivate soil, apply organic fertilizer, and bundle tree insulation.
(Senior Consultant of Sinofert, Professor of China Agricultural University Cao Yiping)
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
After the infection of the new coronavirus, the human nose, throat, hypopharynx, etc. will be "concurrently carried out". By collecting samples such as sputum of the nose, throat, and throat for human virus detection and testing, it can be determined whether the new coronavirus is worn.
self corona test kit,corona kit test,corona self test kit,corona test home kit
Yong Yue Medical Technology(Kunshan) Co.,Ltd , https://www.yongyuecultureplate.com