Abstract: This paper analyzed the cropping intensities and spatiotemporal variations of multiple cropping systems in Zhejiang Province, based on the 2001-2010 Moderate Resolution Imaging Spectroradiometer (MODIS) NDVI datasets (16-day composite MOD13Q1). To derive the cropping intensities, an improved Savitzky-Golay filter was applied to reconstruct the NDVI time-series. The cropping intensities retrieved from MODIS data well agreed with the agro-meteorological observations and statistic data at regional or county level. Corresponding to the phenological phenomena, the NDVI values in the Province generally peaked in February-March, May-June, and August-September. Double cropping system was the most important agricultural system. According to the recent 10 years’ cultivation, the planting area of double cropping system was the largest, and the inter-annual variation was the least. The planting area of single cropping system was roughly at the same level as that of the triple cropping system, and both of them showed larger inter-annual variation. A slow increase of the multiple-cropping index was observed since 2001, with the maximum (205.5) appeared in 2010. However, there was still a large gap to the potential multiple-cropping index (288), suggesting that there would be a higher potential to improve the utilization of cultivated lands in the Province.

Key words: Jiulongshan in Zhejiang Province, Guniujiang in Anhui Province, Pinus taiwanensis,  treering width, climate response.