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室内实验(25℃和50%WFPS)比较研究了碳酸氢铵(普碳)和长效碳酸氢铵(长碳)对粘质土壤(粘土)和壤质土壤(壤土)硝化反硝化过程和NO与N2O排放的影响.长碳中的DCD在粘土中的硝化抑制作用很弱,在壤土中显著,与普碳处理相比,NH+4持续时间分别延长7d和33d.15d内,施普碳(100μgN·g-1)情况下,粘土和壤土NO排放量分别占施N量的060%和106%,分别是相应土壤N2O排放量的30和12倍.施长碳后,粘土和壤土NO排放量分别减少67%和95%,N2O排放量分别减少64%和55%.有氧培养39d后,外加硝酸盐(200μgKNO3N·g-1),接着淹水厌氧培养7d,壤土长碳处理较普碳处理反硝化总损失减少50%,但N2O排放量增加113%.
In laboratory experiments (25 ℃ and 50% WFPS), the nitrification and denitrification processes of loamy soil (clay) and loamy soil (loamy soil) with ammonium bicarbonate (PS) and long-acting ammonium bicarbonate And the influence of N2O emission.The DCD in long carbon has a very weak nitrification inhibitory effect on clay and remarkable in loamy soil, and the duration of NH + 4 is prolonged by 7d and 33d.15d, respectively, (100μgN · g-1), the NO emission of clay and loamy soil accounted for 060% and 106% of the N content, respectively, which were 30 and 12 times that of the corresponding soil, respectively. Emissions were reduced by 67% and 95% respectively, and N2O emissions decreased by 64% and 55% respectively. After 39 days of aerobic incubation, nitrate (200μgKNO3N · g-1) was added followed by anaerobic incubation for 7 days, The total loss of denitrification was 50% lower than that of normal carbon treatment, but the N2O emission increased by 113%.