Vol. 7, Issue 3 (2019)
Influence of moisture on zinc fractions and its association with soil properties in two different types of soils of Karnataka
Author(s): Prabhavathi M, Hrittick Biswas and N Chandra Sekharan
Abstract: An incubation study was conducted to be acquainted with the distribution of different forms of soil Zn in two different types of soils under three different moisture regimes (submergence, saturation and field capacity) for 90 days period. The results revealed that various chemical pools of Zn in soils treated with graded levels of Zn and N fertilizers application (0, 37.5 and 50 kg ha-1 Zn as ZnSO4 and 0, 125 and 150 kg ha-1 N as Urea) varied significantly across the moisture regimes and at different incubation periods. The water soluble and exchangeable zinc (WSEX-Zn) fraction reached the maximum content (2.75 mg kg-1) in M1N4 at 90 days after incubation (DAI) whereas M1N1 at 30 DAI recorded the lowest value (0.08 mg kg-1). Organic carbon content exhibited a significant positive correlation with water soluble and exchangeable zinc, Organic matter and Manganese oxide bound zinc in normal soil at 0 DAI. The mobility factor percentage at 60 DAI followed the order (13.5) >15 DAI (12.8)> 90 (11.8)> 30 (11.6) > 45 (7.5) in normal soil, whereas the mobility factor in saline soil reduced in the order: 15 DAI (10.1)>30 DAI (9.8) > 60 DAI (6.1)>45 DAI (4.3) > 90 DAI (2.8). Among the different moisture levels, field capacity (M3) level significantly increased WSEX-Zn (0.94 and 0.97) as compared to M1 and M2 levels in both soils. These results indicated that while added Zn and N significantly increased the WSEX- Zn fraction of soil, the latter is adversely affected due to longer period of submergence thereby causing a reduction in the Zn availability compared to soils at saturation and field capacity.
Pages: 1092-1097 | 405 Views 80 Downloads
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How to cite this article:
Prabhavathi M, Hrittick Biswas, N Chandra Sekharan. Influence of moisture on zinc fractions and its association with soil properties in two different types of soils of Karnataka. Int J Chem Stud 2019;7(3):1092-1097.
