近几年不时听到一些议论:“国产尿素肥效比进口的低,每亩施同样多的尿素,没有进口尿素增产”。因此有些社员四处打听要买进口的日本尿素。国产尿素是否比进口尿素的肥效低呢?尿素是单质高浓度氮素化肥,含氮量应为46.66%。实际产品中由于含有少量杂质和加用防湿剂,质量指标一般含氮46%。颗粒大小国 In recent years, from time to time to hear some discussion: “domestic urea fertilizer import lower than the same amount of urea per mu, no increase in urea imports.” So some members inquire around to buy imported Japanese urea. Domestic urea is lower than the efficiency of urea imports? Urea is a single element of high concentration of nitrogen fertilizer, nitrogen content should be 46.66%. The actual product contains a small amount of impurities and add anti-wetting agent, quality indicators generally 46% nitrogen. Particle size country