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以普通化肥、竹炭包膜肥和矿物包膜肥等自制缓释肥作为供试肥料,采用土壤淋溶和室内盆栽的方法,研究了竹炭包膜对氮素淋溶损失和对肥料氮素利用率的影响。结果表明,尿素施加到土壤中后淋失比较严重,矿物包膜、竹炭包膜、塑料包膜、复合肥包膜I以及复合肥包膜Ⅱ的N淋失率均低于尿素(P<0.1),其中塑料包膜肥、竹炭包膜和复合肥包膜Ⅱ的淋失率极显著低于尿素对照(P<0.01)。在盆栽情况下,经过竹炭等包膜材料包膜处理后的尿素,其氮素利用率可提高10%￣25%。
In order to study the effects of bamboo charcoal coating on nitrogen leaching loss and nitrogen utilization of fertilizer, the effects of bamboo charcoal coating on soil fertility, Rate of impact. The results showed that leaching of urea was more serious when applied to the soil. The N leaching rate of mineral coating, bamboo charcoal coating, plastic coating, capsule I and composite coating II were lower than that of urea (P <0.1 ). The leaching rate of plastic coated fertilizer, bamboo charcoal coated and compound fertilizer coating Ⅱ was significantly lower than that of urea control (P <0.01). In the case of potted plants, the nitrogen utilization rate can be increased by 10% ~ 25% after urea has been coated with coating materials such as bamboo charcoal.