关键词: 水稻, 水稻, 重金属积累, 遗传相关性, 基因型与环境互作

Abstract:

In order to quantitatively measure the carbon source/sink ability of arable land resource use in Shaanxi Province, so as to provide references for the work to reduce carbon emissions in land utilization, the authors utilized data of Shaanxi Province from 2000 to 2007 to calculate the quantity of carbon absorption and emission of arable land resource use from temporal and spatial perspectives, the authors also calculated the Gini coefficient of carbon sink of arable land. The results showed that: (1)overall from 2000 to 2007 the arable land resource in Shaanxi Province acts as carbon sink and the average annual carbon sink amount was 8.16 million tons; (2)during the study period, the carbon sink of arable land showed the highest level in Guanzhong region, and a relatively high level in Shannan region, Shanbei region showed the lowest level; (3)the components of the Gini coefficient of carbon sink of arable land in different regions showed that the carbon absorbing ability of the arable land increases in both Shaanxi Province and its three regions, with the carbon sink of arable land resource use there was some advantage in Shaanxi Province, but compared with coastal areas, it still had a large gap.