Coupling Relationship Between Land Use Transitions and Grain Yield in Huang-Huai-Hai Plain, China

Land use transition is a mirror of socio-economic development with the changes of both dominant and recessive land use morphologies. Especially, land use intensity is an important attrition of recessive land use morphology, which presents human intervention toward land and regional socio-economic development. Based on the quantitative measure of land use intensity of farmland and rural construction land, this paper described the changes of recessive land use morphology. Furthermore, the coupling relationship between land use transitions and grain yield(GY) was established. The results showed:(1) From 1990 to 2010, the pattern of land use intensity showed prominently difference in Huang-Huai-Hai Plain, with farmland intensity(LUIF) increased while rural construction land intensity(LUIR) decreased; (2) The spatio-temporal patterns of the coupling types of LUIF, LUIR and GY changed obviously, in which the coupling types of "low-low-low" mainly distributed in the Bohai Bay region, and the coupling types of "high-high-high" concentrated in border area of Hebei, Shangdong and Henan provinces; and(3) Land use transitions promoted the evolution of grain production with a coupling relationship from antagonism to coordination between two of them. During the process of land use transitions, in conclusion, it is greatly useful for regional food security by scientific optimizing the coupling relationship between land use transitions and grain yield.