Periodic Changes in Available Micronutrient Cations under Submerged Condition in a Mollisol Treated with Zinc Incubated with Low Doses of Organics

Pratibha Sahai, P. C. Srivastava, S. K. Singh, A. P. Singh

Abstract


An incubation study was conducted to examine the effect of zinc fertilizer and low doses (200 kg ha-1) of farm manure and fresh cow dung on the periodic changes in the availability of micronutrient cations under submerged conditions. The contents of diethylene triamine pentaacetic acid (DTPA) extractable micronutrient cations were recorded throughout the incubation period and were found to rise during early periods but declined at later stages of incubation. Application of FYM increased the contents of DTPA extractable Zn, Cu and Mn significantly while application of fresh cow dung was more effective in increasing DTPA extractable all micronutrient cations except Zn which was significantly decreased. Application of Zn fertilizer increased the content of DTPA extractable Zn but significantly decreased the extractable Mn. A significant effect of three factor interaction involving time x Zn level x type of organics revealed that application of organics especially fresh cow dung was effective in increasing DTPA extractable Fe and Mn during the early stages of submergence.

Keywords


DTPA extractable Iron; Zinc; Copper; Manganese

References


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