Welcome to Journal of University of Chinese Academy of Sciences,Today is

›› 2010, Vol. 27 ›› Issue (5): 605-613.DOI: 10.7523/j.issn.2095-6134.2010.5.005

• Research Articles • Previous Articles     Next Articles

Evidence and causes of intermittent continuous rice cropping since the Neolithic age at Chuodun site in Chinas Yangtze River Delta

LU Jia1,2, HU Zheng-Yi1,2   

  1. 1. State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;
    2. Graduate University, Chinese Academy of Sciences, Beijing 100049, China
  • Received:2010-02-24 Revised:2010-04-12 Online:2010-09-15

Abstract:

Information of phytolith, SOC, cultural layers, and 14C dating in two ancient profiles (0-200cm) was used to probe the history and causes of rice cropping(RC). The results showed the highest rice cropping intensity (RCI) at 100-116cm (Majiabang) and the lowest at 75-100cm (Majiabang-Liangzhu). Nutrients deficiency was not the reason for drastic fall of RCI, but the land use change induced by climate change was. The continuous raise of RCI appeared at 160-100cm (Majiabang), 100-42cm (Liangzhu-Maqiao), and 42-0cm (Song dynasty-now) intermittently.

Key words: rice, ancient soil, rice cropping history, Chuodun site, plant phytolith, nutrient elements, soil organic carbon

CLC Number: