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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2019: 96.39
Index Copernicus ICI Journals Master List 2019 - IJCMAS--ICV 2019: 96.39
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(3): 1192-1205
DOI: https://doi.org/10.20546/ijcmas.2018.703.141


Evaluation of AB - DTPA Extractant for Multinutrients Extraction in Soils
P. Malathi* and P. Stalin
Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore - 3, Tamil Nadu, India
*Corresponding author
Abstract:

To evaluate ABDTPA, a multi nutrient extractant for simultaneous assessment of available P, K, S, Fe, Mn, Zn and Cu, 50 soil samples with wide range of pH were collected and analysed with ABDTPA and established standard methods. A pot culture experiment with maize crop was conducted to correlate the nutrients extracted by extractants with plant uptake. Correlation and regression analysis were carried out separately for each nutrient for acid, alkaline, neutral and all soils to obtain the relationship between amount of nutrients extracted by different methods and also with plant uptake. The results revealed that ABDTPA extractant is suitable for determination of available P in neutral (r=0.946*** with Olsen-P) and alkaline soils (r=0.607*** with Olsen-P) than acid soils (r=0.450NS with Bray-P). Regarding available S, ABDTPA extractant is suitable only for alkaline soils (r=0.870*** with CaCl2-S). ABDTPA extractant can be used for the determination of available K (r=0.865*** with NH4OAc – K), Fe (r=0.982*** with DTPA-Fe), Mn (r=0.832*** with DTPA-Mn), Zn (r=0.952*** with DTPA-Zn) and Cu (r=0.918*** with DTPA-Cu) content of soils in all the pH ranges. Further, correlation of nutrients extracted by extractants with that of plant uptake showed ABDTPA method is suitable for the determination of available P and S content of alkaline soils (r=0.723* and 0.739* respectively) and not a reliable method for acid soils (r=0.464NS and -0.111 NS respectively). For K and micronutrients (Fe, Mn and Zn), ABDTPA and standard methods correlated in a similar manner with plant uptake. Hence, it can be concluded that ABDTPA can be used as a multinutrient extractant for the simultaneous extraction of P, K, S, Fe, Mn, Zn and Cu in alkaline soils.


Keywords: ABDTPA, Multinutrient extractant, Soil available nutrients, Estimation
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How to cite this article:

Malathi, P. and Stalin, P. 2018. Evaluation of AB - DTPA Extractant for Multinutrients Extraction in Soils.Int.J.Curr.Microbiol.App.Sci. 7(3): 1192-1205. doi: https://doi.org/10.20546/ijcmas.2018.703.141