Vol. 12, Issue 8 (2023)

Author(s):
S Krishnakumar, J Selvi, M Jegadeesan, P Arul Arasu and E Subramanian

Abstract:
Phospate ion readily reacts with calcium and magnesium during alakaline pH, to form less soluble compounds. This will leads to less nutrient availability and poor yield. When the pH increases, the availability of the micronutrients viz., manganese (Mn), iron (Fe), copper (Cu), zinc (Zn), and boron (B) be likely to decrease. The above said reasons; field experiment was conducted at Varichur village, Madurai East Block during 2022-23. The treatments viz., Soil test based NPK nutrient application, Enriched farmyard manure, Enriched Cow dung manure with and without Zinc solubilizing bacteria was imposed and positive results were obtained. Application of soil test based NPK + FYM enriched Zinc sulphate 37.5 kg ha^-1 (1:10 ratio) + soil application of ZSB 500 ml having significantly increases plant height (124.2 cm), Number of productive tillers (12.7) and number of filled grains panicle (114.2) compare to the control treatment 88.4, 4.9 and 60.6 respectively and also significantly increases grain yield (5463 kg ha^-1) and Straw yield (7659 kg ha^-1) compare to the control treatment. The percent increase in grain and straw yield over control is 56.2% and 56.9% respectively. The increased thousand grain weight was noticed in T₈ treatment over control treatment (25.20 g). Application of zinc solubilizing bacteria in alkaline soil increase the availability of zinc as well as uptake of zinc positively in alkaline soil.