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Soybean (Glycine max L. cv. JS-72-44) plants were grown at three fertility levels i. e. NPK recommended dose, NPK double recommended dose and without NPK application. Thirty day old plants were expose...d to 0.15ppm SO_2 for 4hrs day^<-1> for 5 days week^<-1> for 6 weeks. The interaction of SO_2 and fertility regimes were studied singly and in combination on growth, biomass accumulation, resource allocation and yield at different stages of plant growth. Yield components were determined at maturity. Morphological characteristics such as shoot and root lengths, number of leaves, nodules and pods, leaf area and biomass accumulation in shoot and root and net primary productivity decreased significantly in SO_2 treated plants grown at diferent fertility regimes. Growth indices such as LAR, LWR, SLA, RSR, NAR and RGR were computed for assessing the change in resource allocation. NAR and RGR of SO_2 treated plants were always lower compared to respective controls. RSR increased in SO_2 treated plants without fertilizer treatment. SLA was always higher for SO_2 treated plants. SO_2 fumigation resulted in significant reduction of seed yield. However, fertilizer amendment reduced the loss of seed yield due to SO_2 treatment. Fertilizer amendment has modified the SO_2 induced changes in growth and resource partitioning. The study suggests that fertilizer at recommended dose may be used to alleviate the injurious effects of sulphur dioxide on soybean.続きを見る
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Mendeley出力
KJ00004506832