Acta Geographica Sinica ›› 2015, Vol. 70 ›› Issue (7): 1080-1090.doi: 10.11821/dlxb201507005

• Land Use • Previous Articles     Next Articles

Spatial and temporal variations of multiple cropping index in China based on SPOT-NDVI during 1999-2013

Mingjun DING1(), Qian CHEN1, Liangjie XIN2, Lanhui LI1, Xiubin LI2()   

  1. 1. Key Lab of Poyang Lake Wetland and Watershed Research of Ministry of Education and School of Geography and Environment, Jiangxi Normal University, Nanchang 330022, China
    2. Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research (IGSNRR), CAS, Beijing 100101, China;
  • Received:2014-10-23 Revised:2015-03-27 Online:2015-07-20 Published:2015-07-20
  • Supported by:
    Projects of International Cooperation and Exchanges NSFC, No.41161140352;Collaborative Innovation Center for Major Ecological Security Issues of Jiangxi Province and Monitoring Implementation, No.JXS-EW-00;National Natural Science Foundation of China, No.41440004, No.41101085


In this paper, the smooth crops growth NDVI curves from 1999 to 2013 were rebuilt by the S-G techniques, with the combination of 10-day SPOT time-series NDVI data from 1998 to 2013 with the spatial resolution of 1 km and land use data in 2000, 2005 and 2010. Spatial and temporal changes of multiple cropping index (MCI) from 1999 to 2013 in China were extracted by a difference algorithm. The results are as follows: (1) The total precision of sample validation based on visual identification was 91.95%, and the slope of linear regression of the MCI between remotely sensed data and statistical data was 0.73 (R=0.775, P<0.001), suggesting that this method is an effective way to extracting spatial information of the MCI for agricultural and land management. (2) From the north to the south of China, the MCI gradually becomes more and more complex. The percentages of the single, double and triple cropping system occupying the total cropland were 43.48%, 56.39% and 0.13%, respectively in China. (3) From 1999 to 2013, the overall cropping index increased with an annual rate of 1.29% (P<0.001) in China, while it exhibited significant differentiation in different zones. The area with a significant decreasing trend occupied 2.12% (P<0.1) of the total cropland and was found at the borders of Hebei, Beijing and Tianjin, central Anhui, the Chengdu Plain, the Poyang Lake Plain, northern and southern Hunan, and central Guangxi. The area with a significant increasing trend occupied 16.40% (P<0.1) of the total cropland and was distributed in eastern Gansu, the Weihe Plain of Shaanxi, western Shanxi, the borders of Hebei, Shandong and Tianjin, the Shandong Peninsula, and the Jianghan Plain. (4) Terrain and economic development level played an important role in the regional differentiation of MCI change. There is a positive correlation between terrain and the inter-annual changes of MCI, and a negative correlation between economic development level and the inter-annual changes of MCI.

Key words: NDVI, multiple cropping index, spatial and temporal variations, pattern, China