【摘要】 采用土壤溶出和盆栽试验的方法,研究了尿素、塑料包膜肥、矿物包膜肥和自制的竹炭包膜肥对氮素溶出率和玉米盆栽的生物效应的影响.结果表明:尿素施加到土壤中后淋失比较严重,矿物包膜肥、竹炭包膜肥、塑料包膜肥的氮溶出率均低于尿素(p均低于0.1),其中塑料包膜肥、竹炭包膜肥的溶出率显著低于尿素对照(p<0.01).尿素经过竹炭等包膜材料包膜处理后,在盆栽情况下,其氮素利用率可提高10%~25%,减少氮素溶出损失,有助于减轻对水体的污染.更多还原

【Abstract】 Soil leaching and pot culture experiments are made to study the N leaching rate of four fertilizers(urea resin-coated urea(RCU),mineral-coated urea(MCU) and bamboo-charcoal coated urea(BCCU)) and the effect on yield,N-intake and N-recovery of maize.The results indicate that the N leaching rate of urea is higher than those of RCU,MCU and BCCU significantly.Nitrogen utilizing rate can be increased by 10%~25% when urea is coated with the mixture of resin and bamboo charcoal.It is found that the bamboo-charcoal coated fertilizers can reduce the N pollution on farming.更多还原