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采用静态箱-气相色谱法对不同灌溉方法(滴灌、沟灌)及相应施肥管理下的葡萄园土壤CO_2和CH_4排放进行了原位观测。结果表明,2012年与2013年生长季之中,不同灌溉方法显著影响葡萄园土壤CO_2和CH4的排放。以滴灌替换沟灌后,2012年CO_2与CH4减排量分别达到(3 530.34±1 611.97)kg/(hm2·a)和(0.392±0.424)kg/(hm~2·a),2013年则分别达到(2 198.43±713.97)kg/(hm~2·a)和(0.136±0.192)kg/(hm2·a),且2012年与2013年不同灌溉处理间CO_2排放量均差异显著;若将宁夏全区沟灌葡萄园全部改造为滴灌葡萄园,则2012年和2013年GWP减排总量(以CO_2计)将达到7 077.14万kg与4 402.58万kg。滴灌能有效抑制土壤CO_2与CH_4的排放损失,更具温室气体减排潜力。
In situ CO2 and CH4 emissions from soils under different irrigation methods (drip irrigation and furrow irrigation) and corresponding fertilization management were studied by static box-gas chromatography (GC-MS). The results showed that different irrigation methods significantly affected soil CO 2 and CH 4 emissions in the vineyard during the 2012 and 2013 growing seasons. After replacing drip irrigation with furrow irrigation, the emission reductions of CO 2 and CH 4 reached (3 530.34 ± 1 611.97) kg / (hm 2 · a) and (0.392 ± 0.424) kg / (hm 2 · a) respectively in 2012 and (2 198.43 ± 713.97) kg / (hm -2 · a) and (0.136 ± 0.192) kg / (hm 2 · a) respectively, and there was significant difference in CO 2 emissions between different irrigation treatments in 2012 and 2013. If Ningxia The entire area of furrow irrigation vineyards transformed into drip irrigation vineyards, the total GWP emission reductions in 2012 and 2013 (CO_2 dollars) will reach 70771400 kg and 42200800 kg. Drip irrigation can effectively reduce the emission loss of soil CO 2 and CH 4, and has the potential of reducing greenhouse gases.