1. Soil salinization, high degree of acidification, due to the continuous production of peppers and other solanaceous vegetables for many years, the application rate of chemical fertilizers has increased year by year. For example, Shandong Shouguang only invested about 300 kilograms of base fertilizer, and its utilization rate of chemical fertilizers is only about 30%. A large amount of acidic chemical fertilizers remain in the soil. Fertilizer itself is also a kind of salt, which will inevitably lead to an increase in soil acidification and salinization. Some old greenhouses have reached a pH of 3-5. The pH value of normal growth of peppers and other vegetables should be between 5.5 and 7. It is conceivable how the pepper grows normally in such an acid environment, can it not appear dead?
2, the proportion of the biological flora in the soil is imbalanced, that is to say, due to years of production will cause beneficial microorganisms in the soil such as photosynthetic bacteria, phosphate-dissolving bacteria, beneficial insects such as cockroaches less and less, and harmful microorganisms such as Fusarium The more harmful insects, such as the tigers, the more cockroaches. This will inevitably lead to some serious diseases and increased pests.
3, the soil nutrient ratio is seriously imbalanced, due to the high yield of peppers and other vegetables, the highest yield per mu can reach tens of thousands of catties, the yield of high crops absorb and demand more nutrients, with the large amount of pepper harvested in the soil Nutrients were taken away. In order to ensure the continuous high yield and stable yield of the crop, the nutrients taken away are supplemented in time by fertilization, but we only pay attention to the application of chemical fertilizers, and the nutrients of the fertilizers are relatively simple, so that there will be a lack of individual nutrients in the soil, resulting in soil. Nutrient imbalance, according to the crop's minimum nutrient law, only the lack of nutrients in the soil, what nutrients to supplement, in order to allow the crop to obtain stable yield. Insufficient fertilization, the lack of individual nutrients in the soil every year will cause a decline in yield, and the resistance of crops will decline, leading to a large area of ​​disease.
4. The nitrogen-carbon ratio in the soil is out of regulation. Carbon is the source of soil life. Without carbon, there is no living thing. There is no biological growth. With the increase of the yield of vegetables such as pepper, the amount of chemical fertilizer increases, and the carbon nutrition and beneficial microorganisms in the soil are consumed in large quantities. Supplementation, the soil fertility is reduced, resulting in chemical fertilizers becoming more and more boring, the soil carbon-nitrogen ratio is only 8:1, severely restricting production, and causing a variety of diseases, such as downy mildew, viral disease, gray mold, root rot When the spraying to prevent these diseases is ineffective, the carbon nutrition should be supplemented in time, and some microbial fertilizers should be applied. Only when the ratio of carbon to nitrogen reaches 30:1, these diseases will disappear and will be cured.
Handmade Apron Kitchen Sink,Kitchen Sink,Stainless Handmade Apron Farmhouse,Handmade Apron Farmhouse Kitchen Sink
Guangdong Huayou Hardware Products Co.,Ltd , https://www.gudsink.com