Amelioration of Sulphur Dioxide Phytotoxicity in Wheat Cultivars by Modifying NPK Nutrients

摘要

Field experiments were conducted to examine the responses of two cultivars of wheat (Malviya 206 and Malviya 234) to sulphur dioxide when grown at six different nutrient levels. Thirty-day-old plants were exposed to 0.15 ppm SO_2 for 4 hours per day, 5 days per week for 8 weeks. Total plant length was reduced significantly in SO_2 treated plants, except those grown using recommended and twice the recommended fertilizer applications. Leaf area, however, was significantly reduced in SO_2 treated plants. Total plant biomass and yield also decreased in plants exposed to SO_2. Root:shoot ratio and leaf:weight ratio altered in plants grown at different nutrient levels and with different SO_2 treatments.