Effect of Irrigation Water Salinity, Sowing Techniques and Mulching on Physio-Biochemical Traits of Fodder Sorghum
Physio-biochemical traits of sorghum under salinity
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Authors
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Kailash Prajapat
ICAR-Central Soil Salinity Research Institute, Karnal, Haryana, India
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RK Yadav
ICAR-Central Soil Salinity Research Institute, Karnal 132 001, Haryana, India
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Ashwani Kumar
ICAR Central Soil Salinity Research Institute, Karnal-132001, Haryana, India
Keywords:
Fodder sorghum, Mulch, Raised bed, Ridge and furrow, Water SalinityAbstract
A lysimetric experiment comprising irrigation water salinity, sowing techniques and mulching was conducted to evaluate the physico-biochemical and quality traits of fodder sorghum. Results revealed that dry matter accumulation (DMA) and green fodder yield (GFY) in the fodder part of sorghum reduced significantly by 20.24% and 8.9%, respectively with the irrigation water salinity of 6.0 dSm-1 as compared to good quality water irrigation. Fodder sorghum grown on two row raised beds recorded significantly highest DMA and GFY. Among physiological traits membrane injury (MI, %), total soluble carbohydrates (TSC), proline content and lipid peroxidation (LPO) increased with saline water irrigation while relative water content decreased significantly. Application of 5 t ha-1 residues as mulch showed beneficial effects by lowering the values of MI, TSC, proline and LPO. The values of proline and LPO were significantly lower under two row raided bed sowing at 20 DAS, whereas, ridge and furrow planted sorghum showed lowest values at 60 DAS. Fodder sorghum grown under best available water, two row raided bed sowing and residue mulching showed highest crude protein. Fibre of acid and neutral detergent portion in fodder significantly reduced under mulched plots as compared to non-mulched plots.
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