This article uses the county-level dataset to analyze the spatial-temporal characters of agricultural net carbon sink from 1991 to 2011 in China. Research shows that: 1) Overall, the agricultural net carbon sink is positive and increasing, with a net increase of 93.7% during this period. 2) The structure of agricultural carbon sink is relatively stable with rice, wheat and maize accounting for about 80% all together, while the structure of carbon source in the same period changed greatly that the main contributing factor of the carbon source changed from pesticide to agricultural fertilizer. 3) The spatial distribution shows the gap of agricultural net carbon sink among regions is narrowing, and there exists three kinds of agricultural carbon ecological zones. 4) During the period of 1991-2011, counties with negative net carbon sink increased in amount and mainly located in the Southwest China and Inner Mongolia. The decreasing agricultural activities, low absorption of carbon during the growth of agricultural grains, more agricultural input factors, and livestock-leading agricultural activities in these regions may be the main reason.
CHEN Luo-ye, XUE Ling, XUE Yan
. Spatial-temporal Characteristics of China’s Agricultural Net Carbon Sink[J]. JOURNAL OF NATURAL RESOURCES, 2016
, 31(4)
: 596
-607
.
DOI: 10.11849/zrzyxb.20150430
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