Newly built greenhouses with low fertility, "three supplements and two supplements" to supplement organic matter
When building greenhouses, in order to save time and effort, the mellow soil on the surface layer is generally used to build the shed walls, so that the soil used for planting vegetables is mostly raw soil about 1.5 meters from the surface. This kind of soil organic matter Lack, so a lot of organic fertilizer must be added.
1. Increase the application amount of manure such as chicken manure. A large amount of organic fertilizers, such as rice husk manure, chicken manure and other organic fertilizers, can increase the amount per mu to about 35 cubic meters. After these organic fertilizers are applied, although the organic matter in the soil cannot be increased rapidly, it can improve the soil to a certain extent. The physical and chemical properties.
2. Increase the application of biological fertilizer. In the newly built greenhouse, the content of *** microbes in the soil is low. Even if a large amount of organic fertilizers such as chicken manure and rice husk manure are applied, the soil lacks microbes and cannot quickly decompose the organic fertilizer into Soil organic matter. Therefore, when vegetable farmers apply organic fertilizers such as rice husk manure and chicken manure to the soil of the new greenhouse, they must pay attention to increasing the application of biological bacterial fertilizer, such as applying 40 to 70 kg of biological bacterial fertilizer per acre to quickly replenish the microorganisms in the soil.
3. Increase the application of commercial organic fertilizers. Commercial organic fertilizer has high organic matter content, which helps the soil quickly replenish organic matter after use. Vegetable farmers can apply manure to the soil of the newly-built greenhouse for the first time, combined with the application of commercial organic fertilizer, and apply about 500 kg per mu, which can ensure the nutrients needed for the early stage of vegetable growth.
4. Supplement nitrogen, phosphorus and potassium fertilizers. The soil in the newly-built greenhouse is raw soil, and the content of nitrogen, phosphorus and potassium in the soil is extremely low, so you must pay attention to adding nitrogen, phosphorus, and potassium fertilizers when applying base fertilizer. Generally, about 50 kg of chemical fertilizer is used per mu.
5. Supplement medium and trace elements. For vegetables to grow healthily, they need not only nitrogen, phosphorus, potassium and other large elements, but also more than 10 medium and trace elements such as calcium, iron and boron. The lack of medium and trace elements in the soil of newly-built greenhouses has become a prominent problem restricting the high yield and quality of vegetables.
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