封存CO_2泄漏量对三叶草生长的影响  

Impacts of leakage of stored CO_2 to growth of trifolium hybridum L.

作　　者：张雪艳[1,2] 尹忠东[3] 赵直[4] 田地[5] 马欣[5] 

机构地区：[1]中国气象科学研究院,北京100081 [2]中国科学院地理科学与资源研究所,北京100101 [3]北京林业大学水土保持学院,北京100083 [4]新疆师范大学地理系,乌鲁木齐830054 [5]中国农业科学院农业环境与可持续发展研究所,北京100081

出　　处：《农业工程学报》2015年第18期197-203,共7页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金(71303227)

摘　　要：随着碳捕集与封存技术在中国的逐步发展，封存CO2泄漏对农田生态系统的潜在威胁日益引起关注，而目前对CO2泄漏时作物的适应能力认识仍不足。选择分布广、耐酸性强的三叶草作为研究对象，设对照（不通 CO2）和采用栽培箱底部通入500、1000、1500和2000 g/（m2·d） CO25个处理，系统评估三叶草对封存CO2泄露的响应。结果发现：在500 g/（m2·d）的CO2泄露情景下，三叶草的生物量、根系活力、营养成分等主要生理指标略有增加或保持稳定，表现出较好的适应能力。随着CO2泄漏量增加到1000 g/（m2·d）以上，三叶草的生物量、根系活力下降，逐步表现出受环境胁迫的特征。在CO2通量处理下土壤pH值在6.80～7.04之间，高于三叶草适宜生长的pH值下限。研究表明，三叶草对封存CO2泄露具有较好的适应能力，为封存CO2泄露应对技术研究提供参考。In recent years, more than 12 demonstration projects of carbon capture and storage （CCS） have been developed in China. The CCS technology can provide the CO2 capture capacity of hundreds of billions of tons and has important significance for mid-long term mitigation of CO2 in China. However, there is leakage risk for the CO2 stored in the geological structure, which may lead to major threats for farmland ecosystem. Along with the development of carbon capture and storage technique, more attentions have been focused on the potential threats from the leakage of stored CO2, and the adaptation capacity of crops to CO2 leakage has not been well understood. This study assessed the response ofTrifolium hybridum L., which is widespread and has strong acid resistance, to leakage of stored CO2. And 4 treatments were designed in the pot experiment, in which the CO2 with the airflow rate from500 to 2 000 g/（m2·d） was added into the bottom of the cultivation box. The experiment simulated the process of the leakage of CO2 in surface soil, and tested if the crop with strong acid resistance would better adapt to the impacts of the leakage of stored CO2. The results revealed that the productive viabilities （biomass, height, root length and root activity） ofTrifeolium hybridum L. increased slightly or remained stable under the leakage of 500 g/（m2·d） CO2, and it showed better adaptation capability under 500 g/（m2·d） CO2 leakage treatment. When the leakage of CO2 increased to over 1 000 g/（m2·d）,Trifolium hybridum L. gradually presented environmental stress, and the biomass and root activity decreased quickly under the leakage of 1 500-2 000 g/（m2·d）. However, the crude protein, crude fiber, ash, crude fat and calcium have no obvious change. The change of soil pH value, from 6.6 to 7.2, was not out of the optimum pH value range forTrifolium hybridum L. growth and development, and the acid resistance should not be the key factor of adaptation capability. The replacement of CO2/O2in soil led to the de

关 键 词：碳 封存 气体 碳捕集与封存 泄露 三叶草 影响 

分 类 号：S541.2[农业科学—作物学]