Welcome to Chinese Journal of Applied Ecology! Today is Share:

Chinese Journal of Applied Ecology

Previous Articles     Next Articles

Topographical and pedological factors adapted to the growth of domestic truffles (Tuber indicum).

QING Yuan1,3, JI Lin2, LI Ting-xuan2, LI Xiao-lin4, LIU Cheng-yi5, YANG Mei5, ZHENG Lin-yong 1,4    

  1. (1Ministry of Education Key Laboratory of Bioresources and Ecoenvironment, College of Life Science, Sichuan University, Chengdu 610064, China; 2College of Resource and Environmental Science, Sichuan Agricultural University, Chengdu 611130, China; 3Department of Light Chemical Engineering, Xichang College, Xichang 615013, Sichuan, China; 4Soil and Fertilizer Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China; 5Sichuan Panzhihua Academy of Agriculture and Forestry, Panzhihua 617061, Sichuan, China)
  • Online:2015-06-18 Published:2015-06-18

Abstract: Topographical and pedological factors at 9 sites of Tuber indicum in Yunnan, Sichuan and Tibet were studied by using principal component analysis in order to determine the connection between trufflegrowth with topographic factors and soil factors. Results showed that: 1) The 5 principal components selected from 15 topographical and pedological factors had a great cumulative contribution, up to 87.5%. Among the topographical factors, the slope position was the most important ecological factor affecting truffles growth. The higher the slope position was, the less conducive to truffles growth. In the middle and lower parts of the slope, T. indicum grew best. 2) As for the
pedological factors, the bulk density, silt content, pH, total nitrogen content, exchangeable calcium and magnesium contents were the important factors restricting T. indicum growth. Under the condition of bulk density 0.65-0.82 g·cm-3, silt content 30.0% and sand content about 55.0%, T. indicum grew well. Too high bulk density or clay content was not conducive to its growth. The soil with pH 6.40 or so, total nitrogen content of 2.29-3.70 g·kg-1, exchangeable calcium content of
22.91-37.17 cmol·kg-1 and exchangeable magnesium content of 1.85-2.59 cmol·kg-1 were favorable for growth of T. indicum. 3) The comprehensive evaluation showed that the site at Shaoshang Village in Kunming, Yunnan and Jiangsegang Village in Linzhi Prefecture, Tibet had higher scores, which meant these two sites had the most favorable conditions for truffles growth. However, the site at Ershijiuliangzi Village in Panzhihua, Sichuan and the Mt. Wuding in Chuxiong Prefecture, Yunnan had lower scores, which meant these two sites were not fit for truffles growth regarding the topographical and soil conditions.