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Subject: Agricultural Biochemistry × Author: Jagdeep Singh × Start date: 2005 × Thesis Type: M.Sc ×
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    Productivity of cotton (Gossypium hirsutum L.) in relation to organic and inorganic nutrition
    (Punjab Agricultural University, Ludhiana, 2012) Jagdeep Singh; Saini, K. S.
    A field investigation entitled, “Productivity of cotton (Gossypium hirsutum L.) in relation to organic and inorganic nutrition” was carried out at Student’s Research Farm, Department of Agronomy, Punjab Agricultural University, Ludhiana during kharif 2011. The experimental field was under organic vs chemical farming system with permanent layout from 1996. Eight treatments N50(FYM)+GM+RI, N50(FYM)+GM+RR, N75(FYM)+RI, N75(FYM)+RR, N50(F)+GM+RI, N50(F)+GM+RR, N75(F)+RI, N75(F)+RR were studied under randomized block design (RBD). The soil of the experimental field was sandy loam with normal pH and EC, high in OC, P and medium in N and K in organic treated plots and medium in OC and K, low N and high P in inorganic treated plots. Microclimate of crop canopy was modified by the treatments where nitrogen was applied through organic source by increasing PARI % and relative humidity and by decreasing soil and crop canopy temperature. Yield attributing character like higher dry matter production, monopodial and sympodial branches, number of picked bolls were significantly higher in treatments where nitrogen was applied through organic source of nutrition as compared to inorganic source of nutrition. Hence maximum seed cotton yield (25.8 q ha -1 ) was recorded with N50(FYM)+GM+RI which was 29.6 % higher than N75(F)+RR i.e. recommended dose of fertilizer. Fibre quality parameter like fibre fineness, fibre elongation, fibre strength, Rd value and b + was not affected significantly by organic and inorganic source of nutrition. GOT, seed index and lint index was also unaffected by different source of nutrition. Oil content of cotton seed was significantly higher with N75(FYM)+RI i.e. 19.85 percent. Soil physico-chemical properties were also improved by organic source of nutrition as compared to inorganic source of nutrition