Vol. 7, Issue 1 (2019)
Zinc dynamics in lowland rice soil as affected by organic manures and zinc fertilization
Author(s): Mangala Devi Perumal, D Selvi, T Chitdeshwari and D Balachandar
Abstract: Knowledge of zinc distribution in various fractions will help to predict the potential of the soil to supply sufficient zinc for crop production. An incubation study was conducted to assess the distribution of different forms of soil Zn under rice growing soils with zinc solubilizing bacteria, organic manures and zinc fertilization. The soils were incubated at submerged condition for a period of 30 days and destructive sampling was done at intervals viz., 7, 15 and 30 days after incubation. The soil samples were analysed to fractionate Zn into Water soluble, Exchangeable, Organic bound, Carbonate bound, FeOx bound, MnOx bound and Residual forms by sequential extraction. Application of organic manures significantly increased all the Zn fractions. Compared to Vermicompost, FYM increased organic bound, water soluble and exchangeable Zn forms, indicating an increase in bioavailability of soil Zn. Application of ZnSO4 significantly increased the bioavailable Zn (Water soluble, Exchangeable and Organic bound) than the other Zn sources. With progress of incubation time, the water soluble, exchangeable forms significantly declined whereas other forms of Zn (Carbonate bound, FeOx bound, MnOx bound and Residual forms) decreased indicating a significant reduction in Zn phyto availability in soil with time. More than 95 percent of the total Zn content occurred in the relatively inactive and mineral bound residual form, whereas only a small percent occurred in Water soluble, Exchangeable and Organic bound fractions.
Pages: 1471-1475 | 373 Views 74 Downloads
download (6206KB)
How to cite this article:
Mangala Devi Perumal, D Selvi, T Chitdeshwari, D Balachandar. Zinc dynamics in lowland rice soil as affected by organic manures and zinc fertilization. Int J Chem Stud 2019;7(1):1471-1475.
