| Abstract: | Using meteorological data and RS dynamic land-use observation data set, the potential land productivity that is limited by
solar radiation and temperature is estimated and the impacts of recent LUCC processes on it are analyzed in this paper. The
results show that the influence of LUCC processes on potential land productivity change has extensive and unbalanced characteristics.
It generally reduces the productivity in South China and increases it in North China, and the overall effect is increasing
the total productivity by 26.22 million tons. The farmland reclamation and original farmlands losses are the primary causes
that led potential land productivity to change. The reclamation mostly distributed in arable-pasture and arable-forest transitional
zones and oasises in northwestern China has made total productivity increase by 83.35 million tons, accounting for 3.50% of
the overall output. The losses of original farmlands driven by built-up areas invading and occupying arable land are mostly
distributed in the regions which have rapid economic development, e.g. Huang-Huai-Hai plain, Yangtze River delta, Zhujiang
delta, central part of Gansu, southeast coastal region, southeast of Sichuan Basin and Urumqi-Shihezi. It has led the total
productivity to decrease 57.13 million tons, which is 2.40% of the overall output. |
