Research on the Decoupling of Agricultural Planting Carbon Intensity and Food Security in Hunan Province, China.

In the high-yielding areas of central and eastern Hunan, mean agricultural carbon intensity peaked in both 2008 and 2017, with cities such as Changsha, Loudi, and Hengyang seeing notable increases between 2002 and 2008 as agricultural intensification advanced—Changsha’s agricultural carbon intensity, for instance, rose from approximately 4.17 t/ha in 2002 to 4.64 t/ha in 2008, before declining steadily by a cumulative 12.8% through 2016 and stabilizing at a relatively low level thereafter, a pattern consistent with the MK test’s finding of a highly significant downward trend.

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