Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (14): 219-225.doi: 10.11924/j.issn.1000-6850.casb14120057

Special Issue: 耕地保护

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Effects of Different Karst Slope Farmland Microtopography on Soil Nutrients

Li Changlan, Dai Quanhou, Cheng Fudong   

  1. (Forestry College, GuiZhou University, Guiyang 550025)
  • Received:2014-12-08 Revised:2015-03-16 Accepted:2015-03-25 Online:2015-06-02 Published:2015-06-02

Abstract: To explore relationship between different karst slope farmland microtopography and soil nutrients, soil nutrients of different karst slope farmland microtopography were surveyed using grid sampling method. Results showed that different karst slope farmland microtopography had different soil nutrients, the average range of total organic matter content in soil was 61.14-191.34 g/kg, the average range of total nitrogen content in soil was 1.50-3.58 g/kg, the average range of total phosphorus content in soil was 0.67-1.31 g/kg, the average range of total potassium content in soil was 13.7-36.4 g/kg. The average ranges of soil nitrogen, phosphorus and potassium content were 210.96-320.88, 1.47-3.91 and 94.61-226.76 mg/kg, respectively, exhibiting the following rules: soil surface> soil bin> soil nest> soil mulch. Correlation analysis showed that there was no significant correlation between microtopography soil nutrients and topographic factors, but karst slope farmland soil nutrients were closely related to microtopography types.