Aged greenhouses should pay attention to the selection of microbial fertilization or humic acid, all water-soluble fertilizers and other fertilizers, both to alleviate soil salinization and conducive to raising the temperature.
Select biological fertilizer. Biofertilizer can release nitrogen, phosphorus and potassium fixed in the soil and promote soil fertility. The use of biological fertilizers in older greenhouses is more effective. In order to ensure that vegetables absorb enough nutrients, it is recommended that vegetable growers use bio-fertilizers and compound fertilizers in rotation.
Choose humic acid fertilizers. Because of the high nutrient content of nitrogen, phosphorus, potassium, and other nutrients in old greenhouses, humic acid fertilizers can increase the utilization of phosphorus and potassium and some trace elements in soil. Humic acid fertilizers have a synergistic effect on phosphorus and potassium. Based on the application of humic acid fertilizers, the amount of chemical fertilizers can be appropriately reduced, generally about 1/3, and humic acid fertilizers commonly used in vegetable production are nitro-humic. Acid, ammonium humate, sodium humate, potassium humate, potassium nitroguanamate, diammonium fulvic, phosphoric acid fulvic, etc., vegetable farmers can choose to apply.
Select all water soluble fertilizers. The total amount of water-soluble fertilizer is small, and only 10 to 15 pounds can be used for a greenhouse with an acre of land, and the utilization rate can be as high as 85%. It can supplement the nutrients needed for crops, and it can be used in rotation with biological bacterial fertilizers in winter. It is worth promoting. Fertilizer way.
Industrial Application Actuator Hand Set
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