Effect of Fly Ash Deposition on Photosynthesis, Growth and Yield of Rice

• Published in: Bulletin of environmental contamination and toxicology 2014-07, Vol.93 (1), p.106-112
• Main Authors: Raja, R, Nayak, A. K, Rao, K. S, Puree, Chandrika, Shahid, Mohammad, Panda, B. B, Kumar, Anjani, Tripathi, R, Bhattacharyya, P, Baig, M. J, Lal, B, Mohanty, Sangita, Gautam, Priyanka
• Format: Article
• Language: English
• Subjects: Albedo; Aquatic Pollution; Biological and medical sciences; Carbon dioxide; Coal Ash - toxicity; Conductance; Crop yield; Deposition; dusting; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Environmental Pollutants - toxicity; flowering; Fly ash; Fundamental and applied biological sciences. Psychology; grain yield; heat; inflorescences; leaves; Non agrochemicals pollutants; Oryza - drug effects; Oryza - growth & development; Photosynthesis; Photosynthesis - drug effects; Phytopathology. Animal pests. Plant and forest protection; Plant growth; Plant Leaves - drug effects; Plant Leaves - growth & development; Plant Transpiration - drug effects; Pollution; Pollution effects and side effects of agrochemicals on crop plants and forest trees. Other anthropogenic factors; Pollution effects. Side effects of agrochemicals; Rice; Soil Science & Conservation; Stomatal conductance; Temperature; tillering; Transpiration; Waste Water Technology; Water Management; Water Pollution Control
• ISSN: 0007-4861; 1432-0800
• DOI: 10.1007/s00128-014-1282-x

An experiment was conducted to assess the effect of fly ash deposition without and with (0.25, 0.50, 1.0 and 1.5 g m⁻² day⁻¹) foliar dusting on the photosynthesis, stomatal conductance, transpiration, leaf temperature, albedo and productivity of rice. Dusting of 0.5 g m⁻² day⁻¹ fly ash and above significantly reduced the photosynthesis, stomatal conductance, transpiration and albedo. Panicle initiation and flowering stages were more influenced by the fly ash deposition as compared to active tillering stage. At higher rates of fly ash deposition, all growth and yield parameters were significantly influenced due to increased heat load and reduced intercellular CO₂ concentration. A significant reduction of 12.3, 15.7 and 20.2 % in grain yield was recorded over control when fly ash was dusted at 0.5, 1.0 and 1.5 g m⁻² day⁻¹, respectively.