%0 Journal Article
%T Agricultural Land Efficiency and Temporal-Spatial Characteristics: Desired Output and Undesired Pollution Emissions<br>考虑“非意欲”产出的农业土地生产效率评价及其时空特征分析
%A LIANG Liutao
%A <br>梁流涛
%J 资源科学
%D 2012
%I 
%X Through industrialization and urbanization, vast amounts of arable land have been used for non-agricultural purposes in China, creating a threat to food security. Enhancing land use efficiency is needed to safeguard food security; however, research in this area has not considered environmental factors. Here, we examine changes in agricultural land production efficiency and explore factors affecting the evolution of agricultural land efficiency. The results show that the average value of agricultural land efficiency from 1997 to 2009 was 0.692, indicating that actual agricultural land output accounted for about 69.2% of potential output. The average growth rate of agricultural land efficiency was 0.6% for 1997-2009, indicating that agricultural land efficiency has improved. In general, agricultural land efficiency fluctuated and increased rapidly after 2004 because of agricultural tax reforms and improvements in the agricultural ecological environment. The average agricultural land efficiency in eastern China was 0.775, 0.650 in central China and 0.654 in western China. Efficiency was related to regional economic development and agricultural production conditions. Provinces with a higher level of economic development in eastern China have higher agricultural land efficiency, while provinces with a lower level of economic development in central and western China have lower agricultural land efficiency. Agricultural land efficiency increased in eastern China over time, and declined in central and western China. Growth in agricultural land efficiency is mainly attributed to technological advancement; the contribution of improvements in efficiency is relatively small. Factors affecting agricultural land efficiency are different in different areas and provinces can be divided into six categories on the basis of influencing factors. Therefore, in different regions we should implement different agricultural and environmental management policies.
%K Agricultural land
%K Directional distance function
%K ML Productivity index
%K Undesired Pollution Emissions<br>农业土地
%K 生产效率
%K ML生产率指数
%K “非意欲”产出
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=9DEEAF23637E6E9539AD99BE6ABAB2B3&aid=DC0994A58AFB6AE985FDF67F2FAD59D0&yid=99E9153A83D4CB11&vid=339D79302DF62549&iid=59906B3B2830C2C5&sid=62B4D73EB11FD2DC&eid=C24DB66A44ADAAF0&journal_id=1007-7588&journal_name=资源科学&referenced_num=0&reference_num=17