›› 2015, Vol. 17 ›› Issue (5): 622-630.doi: 10.3724/SP.J.1047.2015.00622

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Study on Spatial Heterogeneity of the Soil Organic Matter in Typical Tea Gardens of Jiangsu Province and Zhejiang Province

XU Yunhe1, FANG Bin1,2,3   

  1. 1. New Urbanization and Rural Land Problem Research Center, Nanjing Normal University, Nanjing 210023, China;
    2. Geographic Information Resources Development and Collaborative Utilization Innovation Center in Jiangsu Province, Nanjing 210023, China;
    3. Materials Cycling and Pollution Control Key Laboratory in Jiangsu Province, Nanjing 210023, China
  • Received:2014-11-13 Revised:2015-01-08 Online:2015-05-10 Published:2015-05-10

Abstract:

The distribution of organic matters in tea garden soil shows an obvious spatial pattern. Methods to predict the distribution of organic matters in the study region using data from a limited series of sampling points is very important in studying the soil status of tea gardens, providing guidance to manage tea gardens, and improving tea quality and products. In this paper, we made a research on 4 famous tea planting areas in Jiangsu Province and Zhejiang Province, and we conducted a comparative analysis on the spatial heterogeneity of the organic matters in tea garden soil using descriptive statistics and geostatistics, which included the semi-variogram model and the spatial interpolation diagram analysis. Furthermore, we explored the spatial distribution characteristics of the organic matters in tea garden soil and its influencing factors. The results showed that: (1) the average level of the soil organic matters in all of the four study areas was favorable for tea growth. In addition, the average level of soil organic matters in Zhejiang Province was higher than that in Jiangsu Province. (2) The semi-variance function models proposed that a medium spatial correlation existed in the organic content of Xilong growing area, while a strong spatial correlation was discovered in the other three areas. The interpolation map showed that regions with high organic content in the two study areas of Zhejiang was had broader ranges than the other two study areas in Jiangsu. (3) We also conducted a qualitative analysis on factors influencing the spatial distribution of organic matters, based on relevant literatures, investigations and data. As a result, we found that the spatial distribution of organic matters in each area was determined by the structural factors, such as the soil physicochemical properties and the characteristics of landforms. Moreover, the random factors, such as human activities, business operation modes, tea garden management, and proper protection strategies, also had local impacts on the distribution of organic matters.

Key words: soil organic matter, spatial heterogeneity, comparative study, tea gardens