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	The effects of China's cultivated land balance program on potential land productivity at a national scale
	Song W.
	2014
关键词	Land use change Cultivated land balance Potential land productivity China's cultivated land preservation Urban development strategic environmental assessment use efficiency agricultural productivity crop productivity grain production urban expansion spatial-pattern food security policy impact
英文摘要	Decreases in both quantity and quality of cultivated land in China have drawn close attention recently due to the threat to food security. China has implemented a set of cultivated land balance (CLB) programs since the late 1990s, aiming to maintain the quantity and quality of cultivated land across the country. We assessed the outcomes of CLB policy in terms of both quantity balance and quality balance. In particular, we evaluated the effects of CLB policy on potential land productivity (PLP) of cultivated land. During 1999-2008, a total of 21,011 km(2) of cultivated land was lost due to urbanization and economic development while 27,677 km(2) of cultivated land was gained by land exploitation, consolidation and rehabilitation. Thus, the quantity balance aimed for by CLB was achieved. In contrast, quality balance was not met due to both the loss of highly productive cultivated land from urban expansion and economic development and a flawed approach to adding newly cultivated land. In particular, China has typically relied on adding cultivated land by exploitation instead of consolidation, which would add higher productivity land. Therefore, the PLP of the added cultivated land has been rather poor. Nevertheless, the average PLP did increase slightly during 1999-2008, but this was despite CLB rather than because of it. The main cause of the PLP increase was actually a grain-for-green policy that induced considerable reduction in cultivation of low productivity cultivated land. (C) 2013 Elsevier Ltd. All rights reserved.
出处	Applied Geography
卷	46
页	158-170
收录类别	SCI
语种	英语
ISSN号	0143-6228
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/29605]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Song W.. The effects of China's cultivated land balance program on potential land productivity at a national scale. 2014.

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