%0 Journal Article
%T An evaluation of net carbon sink effect and cost/benefits of a rice-rape rotation ecosystem under long-term fertilization from Tai Lake region of China<br>太湖地区长期施肥条件下水稻-油菜轮作生态系统净碳汇效应及收益评估
%A LI Jie-jing
%A PAN Gen-xing
%A ZHANG Xu-hui
%A FEI Qing-hua
%A LI Zhi-peng
%A ZHOU Ping
%A ZHENG Ju-feng
%A QIU Duo-sheng
%A <br>李洁静
%A 潘根兴
%A 张旭辉
%A 费庆华
%A 李志鹏
%A 周萍
%A 郑聚锋
%A 邱多生
%J 应用生态学报
%D 2009
%I 
%X Taking a long-term fertilized rice-rape rotation system in Taihu Lake as test objective, its annual C balance and economic benefit were estimated, based on the measurement of past years grain yield, litter C content, and field CO2 emission as well as the investigation of material and management inputs. The calculated annual C sink under different fertilizations ranged from 0.9 t C·hm-2·a-1 to 7.5 t C·hm-2·a-1, and the net C sink effect under combined inorganic/organic fertilization was three folds as that under chemical fertilization. The C cost of material input ranged from 0.37 t C·hm-2·a-1 to 1.13 t C·hm-2·a-1, and that of management input ranged from 1.69 t C·hm-2·a-1 to 1.83 t C·hm-2·a-1. The annual economic benefit ranged from 5.8×103 CNY·hm-2·a-1 to 16.5×103 CNY·hm-2·a-1, and was 2.1 times higher under combined fertilization than under chemical fertilization. Comparing with that under chemical fertilization, the marginal cost for per ton C sink under combined inorganic/organic fertilization was estimated as 217.1 CNY· t-1 C, very close to the C price of 20 Euro·t-1 C in the EU. In sum, under combined inorganic/organic fertilization, this rice paddy ecosystem could not only have higher productivity, but also present greater net C sink effect and higher economic benefit, compared with under chemical fertilizer fertilization.
%K rice-rape rotation
%K cropland ecosystem
%K long-term trial
%K fertilization treatment
%K carbon sink
%K carbon balance
%K economic benefit<br>水稻-油菜轮作
%K 农田生态系统
%K 长期试验
%K 肥料处理
%K 碳汇
%K 碳平衡
%K 经济收益
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=1E50FABDCDFB0087D15F62BE4DC8E519&yid=DE12191FBD62783C&vid=A04140E723CB732E&iid=DF92D298D3FF1E6E&sid=27B74BA4EDC40A8D&eid=C134FCA51C2CF9D8&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=5&reference_num=0