| 王少杰,高鹏程,林文,杨宪龙,梁婷,同延安.氮肥与秸秆还田对陕西关中灌区冬小麦
农田CO2排放的影响[J].干旱地区农业研究,2013,31(1):117~121 |
| 氮肥与秸秆还田对陕西关中灌区冬小麦
农田CO2排放的影响 |
| Effect of nitrogen fertilizer and straw returning on CO2 emission in winter wheat field in irrigated region of central Shaanxi province |
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| DOI：10.7606/j.issn.1000-7601.2013.01.22 |
| 中文关键词: CO2排放 冬小麦 氮肥 秸秆还田 土壤温度 |
| 英文关键词:CO2 emission winter wheat nitrogen fertilizer straw returning soil temperature |
| 基金项目:2012年公益性行业(农业)科研专项经费资助（201203039） |
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| 中文摘要: |
| 利用静态暗箱-气相色谱法对陕西关中灌区不同氮素用量及秸秆还田处理(190 kg N·hm-2,N190; 150 kg N·hm-2,N150; 75 kg N·
hm-2,N75; 150 kg N·hm-2+5000 kg·hm-2秸秆，N150+S)下冬小麦农
田CO2排放及其影响因素进行研究。结果表明：农田CO2排
放通量呈明显的季节变化规律，且与温度的动态变化趋势相一致；各处理CO2排放通量与
大气温度和土壤温度均具有极显著的指数相关关系，且与大气温度相关性最好；全生长季各
处理累积CO2排放量顺序为：N150+S＞N150≈N190＞N75，在中低氮水平范围内CO2排放
量随施氮量增加而增加，秸秆还田增加了农田CO2排放，排放量较不还田增加18%。 |
| 英文摘要: |
| The CO2 emission in winter wheat field in irriga
ted region of central Shaanxi province under different N rates and straw returni
ng(190 kg N·hm-2,N190; 150 kg N·hm-2,N150; 75 kg N·hm-2,N75
; 150 kg N·hm-2+5000 kg·hm-2 straw，N150+S) was measured by using
static chamber/gas chromatography methods, and the infl
uence factors of CO2 emission were analyzed. The results showed that the CO2
flux fluctuated with the seasonal temperature change. There were highly signifi
cant exponential relationships between CO2 flux and both soil and air temperat
ure. The correlation coefficient between CO2 flux and air temperature was high
er than that between CO2 flux and soil temperature in four treatments. The tot
al CO2 emission in the whole growing season could be ranked as: N150+S＞N150≈
N190＞N75. The CO2 emission increased with the rise of N application rate with
in low and moderate levels. Straw returning boosted CO2 emission greatly, whic
h was 18% higher than no straw. |
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