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Authors: Rawat, Nidhi
Advisor: Melkania, Uma
Title: Effect of elevated carbon dioxide and temperature on growth and yield of wheat and mung
Publisher: G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Language: en
Type: Thesis
Agrotags: carbon dioxide, temperature, growth rate, yield increases, wheats, mung beans, vigna radiata
Abstract: The present study was done to investigate the effect of different CO2, temperature and NPK ratio on wheat and mungbean crop. Increasing atmospheric carbon dioxide concentration and temperature are an important component of global climate change that will have a significant impact on the productivity of crop plants. In this study, growth and yield of wheat and mung plants have been shown to increase with elevated CO2 and have enticed considerable interest due to variation in the response of crop plants. Comparative response of wheat and mung bean was evaluated against different conditions of elevated CO2 and temperature with different combination of NPK fertilizer for two consecutive seasons. The plants were grown in ambient, elevated CO2 (500±30 ppm), elevated temperature (±2˚C) as well as combined CO2 and temperature effect in specially designed open-top chambers. As compared to ambient CO2, elevated CO2 increased total chlorophyll, growth and yield parameters, while elevated temperature reduced the effect. Elevated temperature stress was a major limiting factor in the growth and development of crops. Under elevated CO2 treatment nitrogen, phosphorus and potassium content of shoot and grain get reduced when compared to ambient condition. There was a significant decrease in the protein content of grains under elevated effect. However, the effects of CO2 enrichment on plants also depend on the availability of soil fertilizer. Under elevated CO2 wheat and mungbean crops exhibited increased root growth along with stem and leaves. There was a substantial increase in spikes/pod number and seed number per plant, while harvest index has no significant change. The increase in dry matter and growth of root, stem, tillers, leaves and yield proved that under elevated CO2 fertilization can stimulate photosynthetic rate which can ultimately lead to an increase in biomass of crops. It has found significant effect on nitrogen, phosphorus, potassium and protein content of wheat and mung. In addition, if there is an increase in the NPK levels it can meet the nutrient requirement for growth and production under elevated CO2 and temperature conditions.
Description: Thesis-PhD
Issue Date: 2015-08
Appears in Collections:Theses

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