Use of zinc solubilizing biofertilizers for increasing the growth and yield of cereals: A review
2024
Ladohia, Shivanshu | Rana, Navjot | Srivastava , Prachi | Kumar, Rajesh | Mehta, Swati | Pareek, Bheem
In recent years, the increase due to the rise in the high yielding verities led to the high-rate application of chemicals and pesticides in the soil. These chemical fertilizers give great responses to the farmers on a short-term basis, but in the long term, they harm the soil and human health by interfering in the food chain. The use of biofertilizers is a very good alternative for crop production in a sustainable and environment-friendly manner. Numerous bacteria and fungi can be used as biofertilizers for making the essential nutrients available to the plants which are associated with the rhizosphere of different crops, either symbiotically or non-symbiotically. Zinc plays a vital role in crop growth and achieving a great yield among the various macro and micronutrients. Zinc is responsible for Auxin synthesis, chlorophyll formation, protein metabolism, carbohydrate fixation, disease and stress tolerance. Zn deficiency is a global issue that gradually lowers crop output and productivity. Using zinc solubilizing microorganisms is one of the most effective sustainable approaches to achieving higher yield and restoring soil productivity. These microorganisms solubilize the available zinc pool in the soil so plants can easily uptake zinc. Bacillus subtilis, Thiobacillus thioxidans, Rhizobium, Pantoea sp., Gluconacetobacter, Saccharomyces sp. and PGPR (Plant Growth Promoting Rhizobacteria) are involved in zinc solubilizing process and boost the soluble zinc in the soil. Using zinc solubilizers can reduce the fertilizer requirement of the crop to about 25-50% in combination with inorganic zinc fertilizers, so it reduces overall fertilizer cost.
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