Potassium fixation and release in vertisol under organic, inorganic and integrated nutrient management in central India
Author(s):
Puspanjli Shukla, Priyanka Jadon, Sonali Kamle, Rinku Kamle and Yashwant Gehlot
Abstract:
The potassium fixation and release was studied under nine long term fertilizer treatments viz.,T1- unfertilized control, T2- 20 kg N + 13 kg P ha-1, T3- 30 kg N + 20 kg P ha-1, T4- 40 kg N + 26 kg P ha-1, T5- 60 kg N + 35 kg P ha-1, T6- 6 t ha-1 FYM + 20 kg N + 13 kg P, T7- 5 t ha-1 crop residues + 20 kg N + 13 kg P, T8- 6 t ha-1 FYM and T9- 5 t ha-1 crop residues (CR). The K fixing capacity of soil was determined by conducting an incubation study with additions of various concentrations of K (0, 50, 100, 150, 200, 300 and 400 ppm) to soil. The incubations were carried out for different period of intervals viz. 1, 2, 4, 7, 14 and 30 days and the K was extracted and fixed K was determined. Similarly, the K releasing pattern of soil was evaluated by successive extraction with 0.01 N HCl. The results of present study revealed that the percentage K fixed showed decreasing trend with the increment in added K irrespective of the treatment. Further, the K release showed decreasing trend with increasing number of extractions and all the treatments continued to release K up to 13th extraction. Among the different treatments studied the treatments involving the application of FYM either alone or in combination with chemical fertilizers (T6 and T8) showed superior performance with respect to K fixation and release as compared to the other treatments.
How to cite this article:
Puspanjli Shukla, Priyanka Jadon, Sonali Kamle, Rinku Kamle and Yashwant Gehlot. Potassium fixation and release in vertisol under organic, inorganic and integrated nutrient management in central India. The Pharma Innovation Journal. 2023; 12(11S): 145-150.