欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报 ›› 2000, Vol. ›› Issue (1): 74-78.

• 研究论文 • 上一篇    下一篇

长效碳酸氢铵对土壤硝化-反硝化过程和NO与N2O排放的影响

黄斌1, 陈冠雄1, OswaldVanCleemput2   

  1. 1. 中国科学院沈阳应用生态研究所陆地生态系统生态过程开放实验室, 沈阳110015;
    2. 比利时根特大学农业与应用生物学系, B-9000 Gent
  • 收稿日期:1999-06-18 修回日期:1999-08-30 出版日期:2000-01-25
  • 通讯作者: 黄 斌,男,1971年生,硕士,主要从事陆地生态系统痕量物质生态过程及其调控方面的研究,发表论文10余篇.E-mail:huang.bin@mailcity.com
  • 基金资助:
    中-比国际合作研究项目

Effect of modified ammonium bicarbonate on nitrification-denitrification process and NO and N2O emission

HUANG Bin1, CHEN Guanxiong1, Oswald Van Cleemput2   

  1. 1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110015;
    2. University of Ghent, B-9000 Gent, Belgium
  • Received:1999-06-18 Revised:1999-08-30 Online:2000-01-25

摘要: 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,NH4+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0.60%和1.06%,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(200μgKNO3-N·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%.

Abstract: Compared with ammonium bicarbonate(AB),the effect of modified ammonium bicarbonate (MAB) on nitrification and denitrification processes and NO and N2O emissions in a clay soil (C soil) and a loam soil (L soil) was studied in laboratory (25℃ and 50% WFPS).The inhibition effect of DCD from MAB on nitrification was relatively small in C soil,but considerably great in L soil.Compared with AB,MAB extended 7 days and 33 days for retaining NH4+.During 15 days,the NO emission from C soil and L soil respectively accounted for 0.60% and 1.06% of applied N under AB application (100μg N·g-1 ),which were as 30 and 12 times as the N2O emission from corresponding soils.After applying MAB,the emission of NO from C soil and L soil decreased by 67% and 95%,and the emission of N2O decreased by 64% and 95%,respectively.After 39 days of aerobic incubation,then anaerobically flooded incubation with nitrate addition (200μg KNO3-N·g-1 ) for 7 days,the total loss of denitrification in MAB in L soil was 50% less,and N2O emission was 113% more than in AB in same soil.