In the growth of vegetables, we often find that the soil grows well on the newly opened soil for planting vegetables, and the soil that grows vegetables for many years, especially the soil in which a certain vegetable is continuously grown, often has yield and The quality is declining because of obstacles in the soil environment. Soil is the basis for the growth of all things. If it is used reasonably, it can provide rich returns to humans. However, if the soil cannot be applied scientifically, the benefits of planting vegetables will be greatly reduced.
In the practice of vegetable production, whether it is planting in large fields or using plastic greenhouses for thermal insulation cultivation, soil barriers occur, which brings unstable factors to the normal growth of vegetables. This kind of soil barrier is generally manifested in three aspects. First, some vegetable crops are planted after the sorghum planting, resulting in some soil lacking certain nutrients, and some pests and diseases are serious, such as nematodes, blight, bacterial wilt, sclerotia. Disease, soft rot, etc. Second, the soil pH (pH value) is gradually acidic, not suitable for vegetable growth; third, some soil fertilizer solution is too large, resulting in reverse osmosis phenomenon, light cause vegetables stagnation, heavy cause rotten root Dead seedlings.
The reason for the occurrence of soil barriers is that in some cases, some crops need more nutrients, and long-term planting will make the elements lack, affecting the growth of vegetables and showing symptoms of deficiency. At the same time, certain specific pests accumulate in the soil for years, which makes the harm to vegetables more and more serious. From the soil to acid, mainly the application of nitrogen nutrients is too much, and the conversion of nitric acid into nitric acid causes the nitrate content to increase. . According to the measurement, the content of nitric acid in the protected area is more than 5 times higher than that in the cultivated vegetable field. In terms of soil salinization, the loss is mainly caused by the application of fertilizer, and most of it accumulates in the soil tillage layer, resulting in a salt concentration higher than that of Daejeon vegetables. The ground height is more than 4 times.
In order to protect the vegetable production from normal growth and development, eliminate or alleviate the physiological and biochemical barriers caused by the soil and the pests and diseases, in the fertilizer and water management technology, the following improvements should be made.
First, the application of chemical fertilizer is mixed with organic fertilizer. Single application of chemical fertilizer will accelerate the deterioration of soil properties. After the application of organic fertilizer, it can increase soil organic matter content, adsorb more ammonium, potassium, calcium and other ions, regulate soil nutrient concentration, enhance soil buffer capacity, and effectively supply vegetables for growth. The whole yuan nutrient. At the same time, it is necessary to mix and apply chemical fertilizer and organic fertilizer, and deep application, so that quick-acting and slow-acting fertilizers complement each other and improve fertilizer supply capacity.
Second, change the soil shallow tillage to deep tillage. Because the salt accumulates in the surface of the cultivated layer within 5 cm of the soil, and the accumulation of less than 25 cm of the cultivated layer is less, after each vegetable collection, the deep tillage is carried out to reduce the salt content.
Third, change the topdressing excess to a small number of times. Excessive topdressing increases soil acidity or alkalinity and inhibits vegetable growth. Topdressing should be repeated a small number of times, and advocates root dressing, especially advocating the application of active liquid fertilizers such as Huimanfeng or Zhuangfuxing, which can effectively alleviate several obstacles caused by flail.
Fourth, regular water irrigation. For vegetable land with a high degree of salinization, in addition to the salt washing out of the rain, the salt should be washed by the method of large water furrow irrigation in combination with drought resistance. The first is rapid irrigation and the second is the irrigation of salt and the soil solution. The concentration of the plant is reduced, allowing the vegetables to grow normally.
Author: Zhang Yuhong
Source: Rural News
In the practice of vegetable production, whether it is planting in large fields or using plastic greenhouses for thermal insulation cultivation, soil barriers occur, which brings unstable factors to the normal growth of vegetables. This kind of soil barrier is generally manifested in three aspects. First, some vegetable crops are planted after the sorghum planting, resulting in some soil lacking certain nutrients, and some pests and diseases are serious, such as nematodes, blight, bacterial wilt, sclerotia. Disease, soft rot, etc. Second, the soil pH (pH value) is gradually acidic, not suitable for vegetable growth; third, some soil fertilizer solution is too large, resulting in reverse osmosis phenomenon, light cause vegetables stagnation, heavy cause rotten root Dead seedlings.
The reason for the occurrence of soil barriers is that in some cases, some crops need more nutrients, and long-term planting will make the elements lack, affecting the growth of vegetables and showing symptoms of deficiency. At the same time, certain specific pests accumulate in the soil for years, which makes the harm to vegetables more and more serious. From the soil to acid, mainly the application of nitrogen nutrients is too much, and the conversion of nitric acid into nitric acid causes the nitrate content to increase. . According to the measurement, the content of nitric acid in the protected area is more than 5 times higher than that in the cultivated vegetable field. In terms of soil salinization, the loss is mainly caused by the application of fertilizer, and most of it accumulates in the soil tillage layer, resulting in a salt concentration higher than that of Daejeon vegetables. The ground height is more than 4 times.
In order to protect the vegetable production from normal growth and development, eliminate or alleviate the physiological and biochemical barriers caused by the soil and the pests and diseases, in the fertilizer and water management technology, the following improvements should be made.
First, the application of chemical fertilizer is mixed with organic fertilizer. Single application of chemical fertilizer will accelerate the deterioration of soil properties. After the application of organic fertilizer, it can increase soil organic matter content, adsorb more ammonium, potassium, calcium and other ions, regulate soil nutrient concentration, enhance soil buffer capacity, and effectively supply vegetables for growth. The whole yuan nutrient. At the same time, it is necessary to mix and apply chemical fertilizer and organic fertilizer, and deep application, so that quick-acting and slow-acting fertilizers complement each other and improve fertilizer supply capacity.
Second, change the soil shallow tillage to deep tillage. Because the salt accumulates in the surface of the cultivated layer within 5 cm of the soil, and the accumulation of less than 25 cm of the cultivated layer is less, after each vegetable collection, the deep tillage is carried out to reduce the salt content.
Third, change the topdressing excess to a small number of times. Excessive topdressing increases soil acidity or alkalinity and inhibits vegetable growth. Topdressing should be repeated a small number of times, and advocates root dressing, especially advocating the application of active liquid fertilizers such as Huimanfeng or Zhuangfuxing, which can effectively alleviate several obstacles caused by flail.
Fourth, regular water irrigation. For vegetable land with a high degree of salinization, in addition to the salt washing out of the rain, the salt should be washed by the method of large water furrow irrigation in combination with drought resistance. The first is rapid irrigation and the second is the irrigation of salt and the soil solution. The concentration of the plant is reduced, allowing the vegetables to grow normally.
Author: Zhang Yuhong
Source: Rural News
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