生态环境学报Issue(5)：749-755,7.
不同灌溉方式冬小麦农田生态系统碳平衡研究
Effect of irrigation modes on carbon budget in winter wheat field
摘要
Abstract
Research in terrestrial ecosystem carbon cycle is an emerging field of interest due to global warming. Crop field ecosystem, closely regulated and managed by human and in which carbon movement is strongly affected by field management, is one important component of terrestrial ecosystems. Water conditions in Xinjiang are the most important restriction to the local field ecosystem carbon cycle because of the extremely arid climate. This paper aimed to analyze and evaluate the effects of irrigation modes on carbon emissions during winter wheat production in Xinjiang. Experiments were carried out on during 2012-2013 in the Agricultural Park of Yinning county, north Xinjiang; Variety “Yidong18” of winter wheat was chosen as research subject treatments and drip irrigation (DI) and flood irrigation (FI) were designed for plot experiments.From after-reviving to fully maturing, field data sampling and processing were conducted every 7 days. Typical individuals of wheat were collected and separated as root, stalk, leaf, etc., which dried in the oven for measurement of dry biomass. The soda-lime method was applied for soil respiration and a popular carbon balancing method suggested by Wang Xiaobing was used for the estimation of field ecosystem carbon budget, of which parameters required were referred from publications. Data was analyzed for carbon fixed by plants, direct emission by soil respiration, indirect ones from agricultural means of production (AMP) and the net carbon emissions (NCE) under two treatments. The results showed that carbon storage by plants and soil emission under DI were 15.38% and 11.43% higher than that under FI, respectively, and the difference was in the amount of carbon fixed by ears of wheat, AMP emission under DI was 3.88% lower than that under FI, of which emissions produced during electricity production (EP) accounted for more than 59% in any case.NCE was positive with a significant difference (p<0.01) under all treatments, and was 25.39% higher than that under FI. We concluded that DI had a higher efficiency in carbon sequestration, and improvement in EP emission can reduce carbon emission substantially during winter wheat production.关键词
冬小麦/农田生态系统/碳平衡/滴灌/漫灌Key words
winter wheat/crop field ecosystem/carbon budget/drip irrigation/flood irrigation分类
农业科技引用本文复制引用
牛海生,李大平,张娜,郝维维,徐文修,张洋,赵有来,胡春辉..不同灌溉方式冬小麦农田生态系统碳平衡研究[J].生态环境学报,2014,(5):749-755,7.基金项目
国家自然科学基金项目（31260312）；新疆干旱区水循环与水利用实验室开放课题 （）
