International Journal of Chemical Studies
Vol. 6, Issue 2 (2018)
Stability of organo-zinc complex in application of inorganic and organic nutrients to rice (Oryza sativa) growing soils of West Bengal (India)
Author(s): Sanjay Kumar Ray, KK Barman and D Mukhopadhyay
Abstract: Humic and fulvic acids play a significant role in complexing metal ions in the soil-matrix. A two years field experiment was carried out under an acidic, sandy loam soil conditions, to study the effect of farm yard manure (FYM) and green manure (GM) and inorganic (N-P-K-Zn) nutrient sources on soil humic and fulvic acid characteristics, organo-Zn stability constant, Zn- uptake and yield of puddle rice in an acidic sandy loam soil. The fulvic acids showed higher total acidity and intrinsic viscosity than humic acids, and the carboxylic groups were higher than phenolic groups in all the humic and fulvic acid samples extracted from the experimental plots. The wide variation in ∆E4/E6 characteristics for humic acids was reflected by a higher degree of condensation of aromatic rings. The value of stability constant (log K) was affected by different inorganic and organic (FYM and GM) inputs and varied from 1.32 to 2.45 for humic acids, and from 1.20 to 2.09 for fulvic acids. The organo-zinc stability influenced the Zn uptake by rice and the residual status of Zn in soils. Considering all treatments over the years, integrated application of both the inorganic (NPK 50% & Zn) and organic (50% N through FYM) was found as the most suitable in terms of rice yield.
Pages: 2157-2164 | 274 Views 16 Downloads
How to cite this article:
Sanjay Kumar Ray, KK Barman, D Mukhopadhyay. Stability of organo-zinc complex in application of inorganic and organic nutrients to rice (Oryza sativa) growing soils of West Bengal (India). Int J Chem Stud 2018;6(2):2157-2164.