Abstract
Application of plant growth promoting rhizobacteria (PGPR) affects the enhancement of growth and yield of various crops. This is due to their plant growth promoting mechanisms which could be greatly influenced by the nutritional composition of the soil. Hence, studies on the combined application of fertilizer and micronutrients with PGPR are highly significant to explore its large-scale application. In the present study, the performance of microbial consortium made from three Pseudomonas spp. was analyzed for the growth enhancement of Amaranthus tricolor (L.) in the presence of NPK fertilizer and micronutrients. After 10 weeks of treatment with Pseudomonas consortium, the plant growth parameters like shoot length, number, length and width of leaf, fresh weight, dry weight, root length and the number of root branches were analyzed along with biochemical parameters like protein and chlorophyll contents. A significant enhancement in shoot length and leaves was observed in plants which were treated with the combination of Pseudomonas consortium, 50% fertilizer and micronutrients. The result was comparable to the growth parameters observed for plants treated with 100% fertilizer. In both cases, a threefold increase in fresh weight and dry weight was observed when compared to control. Thus, the result is indicative of the applicability of the integrated system of biofertilizer and chemical fertilizer for better plant productivity. By this approach, the input of chemical fertilizer can be minimized to make the soil more productive. In an era of declining soil fertility, the method used in the study is an environment-friendly approach to improve plant productivity.
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Acknowledgements
The authors acknowledge Kerala State Council Science Technology and Environment (KSCSTE) for the instrumentation support. They also acknowledge Prof. (Dr.) J.G. Ray and Ms. Sayona Anna John, School of Biosciences, Mahatma Gandhi University, Kerala, India, for providing the facility for soil analysis.
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Significance Statement
Talc-based formulation of Pseudomonas spp. consortium enhanced fertilizer utilization and yield of Amaranthus tricolor (L.).
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Soumya, S., Sreejith, S., Shad, K.S. et al. Combined Effect of Pseudomonas spp. Consortium and Fertilizer with Micronutrients on Enhanced yield of Amaranthus tricolor (L.). Proc. Natl. Acad. Sci., India, Sect. B Biol. Sci. 90, 1083–1092 (2020). https://doi.org/10.1007/s40011-020-01179-x
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DOI: https://doi.org/10.1007/s40011-020-01179-x