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20201
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Subject: Environmental Science × Author: Tamanna × Type: Thesis ×
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    ThesisItemOpen Access
    Effect of fly ash application on efficacy of biofertilizers in mustard (Brassica juncea L.) crop
    (CCSHAU, Hisar, 2020-08) Tamanna; Leela Wati
    Fly ash disposal is of grave environmental concern worldwide due to its increasing accumulation over the years, followed by air-water pollution and land degradation. The potentiality of fly ash for its use in agriculture is popularizing day by day due to the fact that it contains almost all the essential plant nutrients i.e., macronutrients including P, K, Ca, Mg and S and micronutrients like Fe, Mn, Zn, Cu, Co, B and Mo. Moreover, continuous use of chemical fertilizers for plant growth in the agricultural field has become an alarming problem for today's world. Therefore, it is required to involve fly ash more effectively in agriculture sector to exploit its various physical and chemical properties fully, which are beneficial for soil and crop health.Fly ash used in the present investigation had grey color, alumina-silicate texture, alkaline pH, with small concentration of available nitrogen, phosphorus and potassium. Growth of bacterial biofertilizers of mustard i.e. Azotobacter chroococcum and Pseudomonas strain P-36 in their respective growth media supplemented with 0.5-5% (w/v) fly ash and survival in sterile soil supplemented with different concentration of fly ash revealed better growth upto 3% supplementation of fly ash indicating stimulatory effect of fly ash on growth of microorganisms at small concentration. Under pot house condition, fly ash amendment in soil at 3% conc. along with biofertilizers treatment of mustard seeds improved plant growth and seed yield in comparison with control. Chlorophyll and oil content of mustard had no remarkable effect of fly ash application. Number of siliquae and seed yield obtained were maximum in treatment comprising of 3% fly ash amendment in soil and seed treatment with PSB and A. chroococcum indicating favourable response of mustard crop to fly ash along with biofertilizer application.