江西农作物碳储量估算与分析

Carbon stock estimation and analysis of crops in Jiangxi

对江西省的农作物碳储量、碳密度进行了研究。结果表明:2003—2007年5年间江西农作物碳储量、碳密度增加;2007年江西11个地级城市农作物碳储量、碳密度表现为宜春农作物碳储量最大,吉安、上饶较大,萍乡最小。宜春、南昌农作物碳密度最大,上饶、吉安、景德镇较大,赣州、萍乡、九江最小。总体上呈东西走向高,南北走向低的趋势。研究结果与袁芳等对江西表层土壤有机碳空间分布特征的研究结论较一致,表明土壤有机碳含量是影响农作物生长的重要因素。江西农作物具有较大的固碳潜力,因此,充分挖掘农作物的生产潜力是提高江西农田生态系统固碳能力和实现其碳汇功能的关键。

The results showed that carbon reserves and density of crops increased in Jiangxi province from 2003 to 2007 and the carbon reserves and density of crops were different among 11 prefecture cities in Jiangxi province.The place with the most carbon reserves of crops was Yichun,next was Ji＇an and Shangrao,and the carbon reserves of crops in Pingxiang was the least.Carbon density of crops was maximum in Yichun and Nanchang,comparatively large in Shangrao,Ji＇an and Jingdezhen,minimum in Ganzhou,Pingxiang and Jiujiang.As a whole,the carbon reserves and density of crops was higher in the East-west direction but lower in South-north direction.The research result was similar to the study on the characteristics of organic carbon reserves spatial distribution of topsoil in Jiangxi province done by Yuanfang and other people.It showed that organic carbon reserves of soil was an important factor of affecting crops growth.The crops in Jiangxi had larger fixing carbon potential.Therefore,excavating crops＇ potential production completely is the key point to help the farmland ecosystem improve the ability of fixing carbon and realize its function of carbon.