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If the amount of fertilizer is too large or the amount of water is insufficient when applying fertilizer, resulting in the concentration of fertilizer solution being too high, root burning is easy to occur. For volatile fertilizers, when the concentration of fertilizer solution is too high, the amount of harmful gases volatilized into the air will also increase relatively, and the chance of harmful gas poisoning will also increase. When volatile fertilizer is used for flushing fertilization, it is easy to increase the concentration of harmful gases in the protected area after fertilization, resulting in harmful gas poisoning.
Generally speaking, when the water is mainly irrigated according to the normal amount, the amount of solid fertilizer can be about 120% of the amount of conventional ground fertilizer. The amount of liquid fertilizer should be slightly turbid after the fertilizer is mixed into the water. In order to reduce the residual amount of fertilizer on the ground, we should try to select some fertilizers with better water solubility for flushing fertilization in the low temperature period. When flushing fertilization with organic fertilizer, we should use the supernatant of retting liquid for fertilization.
In addition, when some volatile fertilizers are used for flushing fertilization, appropriate water shall be applied again after fertilization to further dilute the fertilizers on the ground. At the same time, the amount of water should be suitable for the flushing fertilization method, and the flood irrigation should not be used, so as to avoid or reduce the loss of a large amount of nutrients in the fertilizer with the water. However, it is also not allowed to water too little to prevent fertilizer damage caused by too high concentration of fertilizer solution and surface salinization caused by high concentration fertilization for a long time.
After watering, a wooden stick can be inserted into the ground to check the moisture of the soil layer to determine the suitability of the watering amount. Compound fertilizer the commonly used compound fertilizers mainly include diammonium phosphate, nitrogen phosphorus potassium compound fertilizer, ammonium phosphorus potassium compound fertilizer, etc. When the content of carbon dioxide gas in the environment is appropriate, the amount of carbohydrates produced by plants through photosynthesis under light is also relatively large, and the nutrition in plants is sufficient and the growth and development are good.
Therefore, when the amount of fertilizer is finally determined, the nitrogen fertilizer should be applied at 1.5 ~ 2 times of the theoretical amount, the phosphorus fertilizer at 2 ~ 3 times of the theoretical amount, and the potassium fertilizer at 1.5 times of the theoretical amount. Determine the fertilization method the main role of coarse fertilizer is to improve the soil while providing nutrients for vegetables. Carbon dioxide gas fertilization technology carbon dioxide gas fertilization is one of the indispensable important measures for high-yield and high-quality cultivation of vegetables in protected land.
Generally, with the wide application of high and new technologies in the cultivation of vegetables in protected areas, the technology of carbon dioxide gas fertilization is gradually entering thousands of sheds and rooms, and the equipment used is becoming more standardized and standardized. On the contrary, if the carbon dioxide content in the cultivation environment is insufficient, plants will suffer from carbon dioxide deficiency, which is manifested by insufficient stem development, thin leaves, light colors, poor productivity, low yield, and more poor quality fruits.
Generally speaking, when the water is mainly irrigated according to the normal amount, the amount of solid fertilizer can be about 120% of the amount of conventional ground fertilizer. The amount of liquid fertilizer should be slightly turbid after the fertilizer is mixed into the water. In order to reduce the residual amount of fertilizer on the ground, we should try to select some fertilizers with better water solubility for flushing fertilization in the low temperature period. When flushing fertilization with organic fertilizer, we should use the supernatant of retting liquid for fertilization.
In addition, when some volatile fertilizers are used for flushing fertilization, appropriate water shall be applied again after fertilization to further dilute the fertilizers on the ground. At the same time, the amount of water should be suitable for the flushing fertilization method, and the flood irrigation should not be used, so as to avoid or reduce the loss of a large amount of nutrients in the fertilizer with the water. However, it is also not allowed to water too little to prevent fertilizer damage caused by too high concentration of fertilizer solution and surface salinization caused by high concentration fertilization for a long time.
After watering, a wooden stick can be inserted into the ground to check the moisture of the soil layer to determine the suitability of the watering amount. Compound fertilizer the commonly used compound fertilizers mainly include diammonium phosphate, nitrogen phosphorus potassium compound fertilizer, ammonium phosphorus potassium compound fertilizer, etc. When the content of carbon dioxide gas in the environment is appropriate, the amount of carbohydrates produced by plants through photosynthesis under light is also relatively large, and the nutrition in plants is sufficient and the growth and development are good.
Therefore, when the amount of fertilizer is finally determined, the nitrogen fertilizer should be applied at 1.5 ~ 2 times of the theoretical amount, the phosphorus fertilizer at 2 ~ 3 times of the theoretical amount, and the potassium fertilizer at 1.5 times of the theoretical amount. Determine the fertilization method the main role of coarse fertilizer is to improve the soil while providing nutrients for vegetables. Carbon dioxide gas fertilization technology carbon dioxide gas fertilization is one of the indispensable important measures for high-yield and high-quality cultivation of vegetables in protected land.
Generally, with the wide application of high and new technologies in the cultivation of vegetables in protected areas, the technology of carbon dioxide gas fertilization is gradually entering thousands of sheds and rooms, and the equipment used is becoming more standardized and standardized. On the contrary, if the carbon dioxide content in the cultivation environment is insufficient, plants will suffer from carbon dioxide deficiency, which is manifested by insufficient stem development, thin leaves, light colors, poor productivity, low yield, and more poor quality fruits.
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