一、忌与尿素混合施用作物根系不能直接吸收尿素,只有在土壤中脲酶的作用下,转化为铵态氮后才能被作物吸收利用;碳酸氢铵施入土壤后,造成土壤溶液短期呈酸性反应,会加速尿素中氮的挥发损失,故碳酸氢铵不能与尿素混合施用。二忌与过磷酸钙混合过夜施用碳酸氢铵与过磷酸钙混合施用,虽比分别单施效果好,但 Avoid using urea mixed with crop roots can not directly absorb urea, urease only in the soil under the action of ammonium nitrogen into the crop can be absorbed and utilized; ammonium bicarbonate into the soil, resulting in short-term acidic solution of soil reaction , Will accelerate the volatilization of nitrogen in urea, so ammonium bicarbonate can not be mixed with urea. Second bogey mixed with superphosphate overnight application of ammonium bicarbonate and superphosphate mixed application, although the effect than the single application, but