| Popis: |
Out of the 17 elements essential for plant growth and reproduction, 8 are micronutrients. The soil supplies relatively large amounts of nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur as macronutrients and relatively small amounts of iron, manganese, boron, molybdenum, copper, zinc, chlorine, and cobalt, as micronutrients. Both deficiency and excess of micronutrients negatively impact the growth and productivity of plants and therefore should be supplied in sufficient amounts in appropriate ratios. A number of biotic and abiotic factors and their relationships affect the appropriate balance of macro- and micronutrient pool in the soil. The focus on addressing micronutrient deficiencies in soil in relation to agriculture has not been adequate in comparison to that for macronutrients. However, with the recent recognition on their impact on crop productivity and the efficiency of NPK uptake by plants, much attention was drawn to regulating micronutrient content in soil with chemical supplements. Environmental concerns encountered with the use of chemical supplements have directed the world into eco-friendly and sustainable approaches in addressing issues in many fields including agriculture. The use of naturally inhabiting microorganisms, “indigenous microorganisms,” has been one of such eco-friendly approaches in agriculture. This review discusses the approaches that have been researched and used with indigenous microorganisms having micronutrient solubilization ability to regulate micronutrient availability in soil and the potential of developing them to optimize the crop productivity while maintaining a sustainable environment. |
