Vol. 6, Issue 4 (2018)
Comparative assessment of nutrient availability in soils of pomegranate orchards using universal extractant and traditional extractants
Author(s): T Anusree, R Suma, MS Nagaraja, SM Prasanna, SN Patil and A Gandhe
Abstract: A study was conducted to examine the reliability of Ammonium bicarbonate diethylene triamine penta aceticacid (AB-DTPA) extractant in determining the nutrient status of soils of pomegranate orchards as compared to traditional methods. AB-DTPA is used for extracting available P2O5, K2O, Zn, Cu Fe and Mn simultaneously from soils and estimated using microwave plasma atomic emission spectrophotometer (MPAES). This was compared against the nutrient values determined using the traditional methods viz., colorimetric estimation of available P2O5 using Olsen’s extractant, flame photometry technique for available K2O using neutral normal ammonium acetate and DTPA extractant for estimation of Zn, Fe, Mn and from soil. The estimated values using different extractants showed significant difference for availability of P2O5, Zn, Cu, Fe and Mn in pomegranate orchard soils while, K values did not differ. To assess the probable effect of Ca, the nutrient values were further categorized as low, medium and high Ca containing soil. The results indicated higher correlation between two methods for availability of P2O5 (0.783), Zn (0.780), Cu (0.838), Fe (0.721) and Mn (0.858) in low Ca containing soils. However, the linear relationship can’t be established for medium and high Ca containing soils, signifying limitation of using AB-DTPA extractant for assessing soil nutrient variables using MP-AES instrument for Ca rich soils.
Pages: 1818-1822 | 344 Views 50 Downloads
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How to cite this article:
T Anusree, R Suma, MS Nagaraja, SM Prasanna, SN Patil, A Gandhe. Comparative assessment of nutrient availability in soils of pomegranate orchards using universal extractant and traditional extractants. Int J Chem Stud 2018;6(4):1818-1822.
