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Oscar Burbano‑Figueroa1,Jazmin Vanessa Pérez‑Pazos,Milena Moreno‑Moran 한국작물학회 2022 Journal of crop science and biotechnology Vol.25 No.3
Cassava · Commercial inoculants · Data envelopment analysis · DEA · Technical efciency · NPK · Yield gaps · Nutrient-limited yieldPlant growth promoting microorganisms (PGPMs) are inhabitants of the rhizosphere that are able to provide better growth and biomass accumulation. Current agronomic practices have depleted these communities, which has created the opportunity for the development of commercial inoculants. These products use strains that are able to interact with a wide range of plant species and survive in diverse environments. The use of these generalist strains is required for providing a widespread solution that aggregates enough demand to reach market scale. Growth promotion by generalist strains may be suboptimal in comparison to the efect provoked by native and host-specifc populations, but these specialist strains are not a marketavailable solution. In this work, we assess the nitrogen, phosphorus and potassium (NPK) use efciency provided by commercial inoculants to cassava plants using Data Envelopment Analysis (DEA) to demonstrate the advantages of conceiving nutrient-limited yield as a production function. We also estimate the prospective production frontier that commercial inoculants can provide to cassava plants. Our results suggest that commercial inoculants have potential for improving cassava yields via improved NPK use efciency. The methods presented here ofer an ecological/economic production framework for the assessment of PGPMs and PGPMs-based commercial inoculants that can be extended to other laboratory, greenhouse or feld situations. The simple, intuitive and graphical approximation that DEA ofers will facilitate the understanding of the concept of technical efciency and the role of commercial inoculants on closing yield gaps
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