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不同种类氮肥对土壤释放N2O的影响
引用本文:侯爱新 Clee.,OV. 不同种类氮肥对土壤释放N2O的影响[J]. 应用生态学报, 1998, 9(2): 176-180
作者姓名:侯爱新 Clee.  OV
作者单位:中国科学院沈阳应用生态研究所!沈阳110015(侯爱新,陈冠雄),比利时根特大学农业与应用生物科学院!GhentB9000(O.VanCleemput)
基金项目:比利时外交贸易发展合作部、美国农业部资助项目
摘    要:用培养试验模拟研究了在正常水分 ( 2 2 % )、干旱 ( 1 2 % )和高含水量 ( 32 % )条件下 ,普通碳酸氢铵 (普碳 )、尿素及新型肥料长效碳酸氢铵 (长碳 )对土壤释放N2 O的影响 ;同时考察了土壤NO-3 的形成时间和形成量 .结果表明 ,农田中施加的无机氮肥是大气中N2 O的重要来源 ,而长碳与普碳和尿素相比 ,不但可以明显延后N2 O释放高峰期出现时间 ,而且大多数情况下可以显著减少其释放量 (P <0 .0 1 ) .在 5个月的监测期内 ,与普碳和尿素相比其减少N2 O释放的比例分别为 80 .2 3和 88.41 % ( 1 2 %含水量 ) ,40 .0 0和2 7.59% ( 2 2 %含水量 ) ,无减少作用和 45.88% ( 32 %含水量 ) .本研究结果提示长碳具有作为农田生态系统N2 O减排措施的巨大潜力 ,同时暗示在农业中用长碳代替目前普遍应用的普碳 ,可以减少地下水中NO-3 引起的污染 .

关 键 词:普通碳酸氢铵  尿素  长效碳酸氢铵  N_2O释放速率

Effect of different nitrogen fertilizers on N_2O emission from soil.
Hou Aixin,Chen Guanxiong. Effect of different nitrogen fertilizers on N_2O emission from soil.[J]. The journal of applied ecology, 1998, 9(2): 176-180
Authors:Hou Aixin  Chen Guanxiong
Abstract:Incubation experiments were made to study the effects of ammonium bicarbonate(AB), urea and modified ammonium bicarbonate(MAB) on N 2O emission from soil and NO - 3 formation in soil (under low(12%), normal(22%) and high (32%) soil moisture conditions). The results showed that the inorganic nitrogen fertilizers applied in fields were the important source of atmospheric N 2O. In most situations, MAB not only greatly delayed the occurrence of N 2O emission peak, but also reduced the amount of N 2O emission significantly (P<0.01), compared with AB and urea. In comparison with AB and urea, the amounts of N 2O emission were reduced by 80.23 and 88.41% (low moisture, 12%),40.00 and 27.59% (normal moisture, 22%) and little reduction and 45.88% (high moisture, 32%), respectively, during a period of 5 month incubation when MAB was applied. It is indicated that MAB was a promising N fertilizer from the aspect of reducing N 2O emission from agroecosystem. The results also implied that applying MAB instead of AB which is used widely in China at present, might reduce the NO - 3 pollution of the underground water.
Keywords:Ammonium bicarbonate(AB)  Urea  Modified ammonium bicarbonate(MAB)  N_2O emission rate.
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