【摘要】 尿素、碳铵和氯铵对蔬菜产量和品质的影响的田间试验结果表明,大白菜在等氮量情况下,对尿素,碳铵和氯铵的肥效无显著差异,盆栽试验结果也表明,尿素与碳铵肥效相当,唯氯铵肥效因蔬菜种类而异,氯铵有明显降低蔬菜硝酸盐含量的效果,氯铵与尿素相比,约降低硝酸盐50%,在中等氮素水平下,尿素、碳铵和氯铵处理,蔬菜硝酸盐平均含量分别为659,633和440 ppm,除氯铵处理在允许范围内外,尿素和碳铵处理均超过标准。更多还原

【Abstract】 In field experiments of urea〔CO（NH₂）₂〕,ammonium carbonate（NH₄HCO₃）,and ammonium chloride （NH₄C₁）on yield and quality of ve-getables Chinese Cabbage（Brassica penkinensis Rupr.） showed no significantdifference at the same N level with the tested fertilizers.Pot experiments foundthe effect of CO（NH₂）₂ similar to that of NH₄HCO₃,but the effect of NH₄CIvaried with vegetable varieties.Analysis of NO₃^-in vegetables （fresh leaves）showed that,compared with urea,NH₄CI reduces 50%of NO₃^-in the plant bo-dy.At middle N level the average NO₃^-content in plants treated with urea,ammonium carbonate and ammonium chloride were 659,638 and 440 ppm respe-ctively,among which only ammonium chloride treatment was near the permis-sible level （432 ppm）.更多还原