Journal of Food, Agriculture and Environment

Relationships between Mehlich-3, ASI and routine methods of soil available nutrients analysis for paddy soils in China

Author(s):

Jinshan Liu , Zhiwen Liao, Chengxiao Hu ^*, Weihong Qiu, Xuecheng Sun, Qiling Tan

Recieved Date: 2010-10-21, Accepted Date: 2011-01-14

Abstract:

The Mehlich 3 (M3) universal soil extraction method was compared with the routine extraction procedure (RM) and Agro Services International extraction method (ASI) for the analysis of calcium (Ca), magnesium (Mg), sulfur (S), potassium (K), phosphorus (P), zinc (Zn), copper (Cu), manganese (Mn) and iron (Fe). Twenty-four paddy soils from Hubei province of China were analyzed by the three procedures. The results showed that soil P content tested by routine method was much higher than that of ASI and M3. Soil nutrient content of Ca, Mg, S, Fe and Zn tested by M3 was highest and that of routine method was lowest, respectively. ASI-Mn was lower than DPTA-Mn (RM) and M3-Mn, ASI-Cu was higher than M3-Cu and DPTA-Cu (RM). Although the testing value of soil nutrients was different, there existed a high degree of correlation (P<0.01) between three testing methods for analyzing soil available P, K, Ca, Mg, S, Fe and Zn, respectively, but there was no significant correlation between ASI and M3 for analyzing the soil available Mn and Cu. The difference of results might be due to the different extractants and extracting method. In order to assess the nutrient status of soils and determine fertilizer recommendations quickly and conveniently, the three soil testing methods are still to be developed.

Keywords:

Agro Services International method, comparison, DPTA, Mehlich-3, soil test

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Journal: Journal of Food, Agriculture and Environment
Year: 2011
Volume: 9
Issue: 1
Category: Environment
Pages: 516-520

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