Effect of Fertility Levels on Growth and Yield of Sweet Sorghum [Sorghum bicolor (L.) Moench] Genotypes
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Date
2020
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MPUT, UDAIPUR
Abstract
A field experiment entitled “Effect of Fertility Levels on Growth and Yield of Sweet Sorghum [Sorghum bicolor (L.) Moench] Genotypes” was conducted at the Agronomy Farm, Rajasthan College of Agriculture, Udaipur during kharif, 2019 with the objectives of standardizing fertility level and assessing feasibility of Sweet sorghum genotypes under rainfed condition besides finding economically viable treatment. The soil of the experimental field was clay loam in texture, moderately alkaline in reaction (8.0 pH), medium in organic matter content (0.72 %), low in available nitrogen (247.8 kg ha-1), medium in available phosphorus (21. kg ha-1) and high in available potassium (357 kg ha-1). The experiment comprised of 9 treatment combinations including three fertility levels (75, 100 and 125 % RDF) and three genotypes (SPV 2530, CSV 19SS and CSV 24SS) laid out in a factorial randomized block design and replicated thrice.
Plant population (30 & 60 DAS and harvest) and number of panicles m-2 were not influenced significantly by genotypes. Maximum plant height was recorded in SPV 2530 at 30, 60 DAS and harvest. The highest dry matter accumulation was recorded in CSV 24SS at 30, 60 DAS and harvest. SPV 2530 reached the 50 per cent flowering stage earlier than other genotypes. Genotype SPV 2530 recorded the highest chlorophyll content (30 & 60 DAS), maximum grain weight panicle-1 and number of grains panicle-1 whereas CSV 19SS recorded the highest test weight. Further, CSV 24SS produced the highest grain yield (4,831 kg ha-1) and harvest index (30.35 %). CSV 19SS produced the highest stover yield (12,721 kg ha-1) and biological yield (17,094 kg ha-1). Genotype CSV 24SS also recorded maximum net return (₹ 88,467 ha-1) and B C ratio (3.45).
Fertility levels failed to bring about significant influence on plant population m-2 (30 & 60 DAS and harvest), days to maturity, number of panicles m-2 and harvest index. Among the fertility levels application of 125 per cent RDF (80 kg N + 40 kg P2O5 + 40 kg K2O ha -1) recorded higher plant height (30 & 60 DAS and harvest), dry matter accumulation plant-1 (30 & 60 DAS and harvest), leaf area index (30 DAS), grain weight panicle-1 and test weight over 75 and 100 per cent RDF. Fertilization with 125 per cent RDF also took minimum days to 50 per cent flowering (69.22 days). Application of 125 per cent RDF recorded significantly higher grain yield (5,263 kg ha-1), stover yield (12,458 kg ha-1), biological yield (17,721 kg ha-1), net return ( ₹ 99,282 ha-1) and B C ratio (3.78) compare to the 75 and 100 per cent. Further, this fertility level recorded significantly higher N, P and K contents and their uptakes by grain and stover over 75 and 100 per cent RDF. It also recorded significantly higher soluble protein content in grain over other fertility levels.
Description
Effect of Fertility Levels on Growth and Yield of Sweet Sorghum [Sorghum bicolor (L.) Moench] Genotypes
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Citation
Meena K. And Kaushik M.K.