尿素是最常用的速效性氮素肥料。一般情况下,尿素利用率仅只为30—40%,也就是说,50千克尿素施入土中,能被作物吸收利用的只有15—20千克。那么,怎样才能提高尿素利用率呢?一、深施覆土尿素在土壤中分解的最终产物是碳酸铵,碳酸铵很不稳定,在土壤中或土壤表而分解形成游离氨,易挥发损失,所以尿素也要深施覆土。实践 Urea is the most commonly used fast-acting nitrogen fertilizer. Under normal circumstances, urea utilization rate of only 30-40%, that is, 50 kg of urea applied to the soil, the crop can be absorbed and utilized only 15-20 kg. So, how can we improve the utilization rate of urea? First, the deep application of urea in the soil decomposition of the final product is ammonium carbonate, ammonium carbonate is very unstable in the soil or soil surface decomposition of free ammonia, volatile loss, so Urea also apply deep soil cover. practice