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1选择生物肥料:生物肥料能把土壤中固定的氮、磷、钾释放出来,促进土壤肥力提高。在老龄大棚中施用生物肥料效果更为显著。为保证充足的营养,建议生物肥料与复合肥轮换施用。2选择腐殖酸类肥料:因为老龄大棚土壤中氮、磷、钾等养分含量较高,腐殖酸肥料能够提高土壤中磷、钾以及某些微量元素的利用率,在增施腐殖酸肥料的基础上,可以适当减少化学肥料的用量,一般可减少1/3左右。蔬菜生产中常用的腐殖酸肥料有硝基腐殖酸、腐殖酸铵、腐殖酸钠、腐殖酸钾、硝基腐殖酸钾、腐酸二铵、腐酸磷肥等,菜农可选择施用。3选择全水溶性肥料:全水溶性肥料用量少,667m2的大棚一次冲施5~7.5kg即可,而利用率则在85%以上,能及时补充作物所需的营养。(源自:中国化肥网)
1 Select biological fertilizers: biological fertilizers can release fixed nitrogen, phosphorus and potassium in the soil to promote soil fertility. Application of biological fertilizer in the old greenhouse effect is more pronounced. In order to ensure adequate nutrition, it is recommended that biological fertilizers and compound fertilizers be used interchangeably. 2 Select humic acid fertilizer: Because of the high content of nitrogen, phosphorus, potassium and other nutrients in the old greenhouse, humic acid fertilizer can increase the utilization of phosphorus, potassium and some trace elements in the soil, Based on fertilizers, you can reduce the amount of chemical fertilizers, generally reduce the 1/3 or so. Humic acid fertilizers commonly used in vegetable production are nitro humic acid, ammonium humic acid, sodium humate, potassium humate, potassium humic acid, diammonium formate, fulvic acid phosphate fertilizer, vegetable farmers Choose to apply. 3 Select all water-soluble fertilizer: less water-soluble fertilizer, 667m2 greenhouse Chong Shi 5 ~ 7.5kg can be, while the utilization rate of more than 85%, timely replenishment of crops required nutrition. (From: China Fertilizer Network)