EVALUATING POTASSIUM-USE-EFFICIENT COTTON GENOTYPES USING DIFFERENT RANKING METHODS |
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Authors: | Zia-ul-hassan Muhammad Arshad Azeem Khalid |
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Affiliation: | 1. Department of Soil Science , Sindh Agriculture University , Tandojam, Pakistan;2. Institute of Soil and Environmental Sciences , University of Agriculture , Faisalabad, Pakistan;3. Department of Environmental Sciences , Pir Mahar Ali Shah University of Arid Agriculture , Rawalpindi, Pakistan |
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Abstract: | Identification of cotton (Gossypium hirsutum L.) genotypes efficient in potassium (K) uptake and utilization, under K-deficient conditions represents a cost-effective and environmentally friendly approach for low-K-input agriculture. It would reduce the costly input of K-fertilizers and manage K resources in agro-ecosystems. We ranked 25 cotton genotypes for their K use efficiency under deficient and adequate K regimes in hydroponics, using two different methods. K deficiency generally reduced cotton growth; however, K-efficient genotypes accumulated more biomass due to higher K uptake. Genotype NIBGE-2 exhibited excellent adaptation potential in terms of high shoot dry weight under both K regimes and ranked as the only most desirable, “efficient-responsive” genotype. Genotype CIM-506 produced low shoot dry weight under low K condition and ranked as “non-efficient.” Genotype Desi okra produced low shoot dry weight at adequate K level and ranked as “non-responsive.” Genotype ranking using two different methods ensured the validity of results. |
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Keywords: | Gossypium hirsutum genotypic variation K use efficiency K uptake K utilization ranking methods |
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