Vol. 7, Issue 5 (2019)
Phosphorus adsorption characteristics and isotherms under different land use practices in acidic soils of Nagaland
Author(s): Alika N Zhimo, Dr. PK Singh and Samanyita Mohanty
Abstract: A research investigation was undertaken in Nagaland University: School of Agricultural Science and Rural Development to estimate the effect of phosphorus adsorption in acidic soils of Nagaland under two land use practices i.e., forest and cultivated soils. Twenty two soil samples were collected from forest and cultivated soils of eleven districts of Nagaland. Effect of soil properties on phosphate adsorption was examined. The soil samples of each soil were equilibrated for 24 hrs at 25 2 oC with aqueous solution of KH2PO4 containing 0-100 µgP mL-1 in a (1:20) soil: solution ratio. The amount of phosphorus adsorbed increased and distribution coefficient (Kd) and the percentage of added phosphate adsorbed (Xad) decreased with increasing solution phosphorus concentration. Phosphate adsorption was satisfactorily described by Langmuir and Freundlich equations. Langmuir equation was fitted more in both forest and cultivated soils followed by Freundlich equation. The pH was correlated negatively with constants of Langmuir (b and k) and Freundlich (kf and 1/n). Aluminium was correlated positively with all the constants of Langmuir and Freundlich isotherm of forest soils. Also, adsorption maxima of Langmuir equation is significantly and positively correlated to clay of cultivated soils. In general forest soils (average 420.19ppm) have higher phosphorus adsorption than (average 383.06ppm) cultivated soil through paired t-Test. The results concluded that effect of land use practices were responsible for varying degree of phosphorus adsorption.
Pages: 3208-3213 | 266 Views 52 Downloads
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How to cite this article:
Alika N Zhimo, Dr. PK Singh, Samanyita Mohanty. Phosphorus adsorption characteristics and isotherms under different land use practices in acidic soils of Nagaland. Int J Chem Stud 2019;7(5):3208-3213.
