干旱地区农业研究2013，Vol.31Issue(1)：117-121,5.
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
摘要
Abstract
The CO2 emission in winter wheat field in irrigated region of central Shaanxi province under different N rates and straw retuming( 190 kg N·hm-2,N190; 150 kg N·hm-2,N150; 75 kg N·hm-2, N75; 150kg N·hm-2 + 5000 kg·hm-2 straw,N150+ S) was measured by using static chamber/gas chromatography methods, and the influence factors of CO2 emission were analyzed. The results showed that the CO2 flux fluctuated with the seasonal temperature change. There were highly significant exponential relationships between CO2 flux and both soil and air temperature. The correlation coefficient between CO2 flux and air temperature was higher than that between CO2 flux and soil temperature in four treatments. The total 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 within low and moderate levels. Straw returning boosted CO2 emission greatly, which was 18% higher than no straw.关键词
CO2排放/冬小麦/氮肥/秸秆还田/土壤温度Key words
CO2 emission/ winter wheat/ nitrogen fertilizer/ straw returning/ soil temperature分类
农业科技引用本文复制引用
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):117-121,5.基金项目
2012年公益性行业(农业)科研专项经费资助(201203039) （农业）
