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利用从德国引进的农田土壤氨挥发风洞法测定系统,对不同N肥形态的肥料进行对比实验。结果表明,在相同施N量条件下,硝酸铵、硝酸铵钙、硫硝酸铵的氨挥发损失分别比尿素减少22.5%、3.2%和8.3%,不同N肥的氨挥发损失差异很大。相同条件下,尿素的氨挥发损失为25.7%,添加DMPP后氨挥发损失为27.6%;硫硝酸铵的氨挥发损失为18.6%,添加DMPP后为20.6%;添加DMPP对尿素和硫硝酸铵的氨挥发影响不显著。
The ammonia volatilization wind tunnel method was used to measure the soil fertility of different N fertilizers. The results showed that ammonia volatilization loss of ammonium nitrate, calcium ammonium nitrate and ammonium sulfate was 22.5%, 3.2% and 8.3% lower than that of urea under the same nitrogen application rate. The ammonia volatilization loss of different nitrogen fertilizers varied greatly. Under the same conditions, the ammonia volatilization loss of urea was 25.7%, ammonia volatilization loss was 27.6% after addition of DMPP, ammonia volatilization loss was 18.6% and ammonium sulfate was 20.6% after addition of DMPP, and the addition of DMPP to urea and ammonium sulphate Ammonia volatilization has no significant effect.