【摘要】 2年田间与盆栽试验结果表明,合理施用磷钾肥是提高大白菜（青杂三号）产量和品质的重要技术措施,特别是钾肥的施用,能降低叶菜体内NO₃^-的累积,并以施尿素40kg/亩、过磷酸钙20kg/亩和氯化钾10kg/亩为最优组合。更多还原

【Abstract】 The field and pot experiments in two years indicated that the rational application of phosporus and potassiium fertilizers could increase yield and imrove quality of Chinese cabbage and potassium applieation could remar kably decrease nitrate accumilation in plants.In the field the higher yield and lower nitrate Contents were obtailled by applying 600kg urea,300kg superphos phate and 150kg potassium chloride per hectare,which proved to be a rational combination更多还原