大气CO2浓度升高和增温交互作用对水稻光合作用的影响
毕业论文关键词：水稻；光合作用；温度升高；CO2浓度升高
Elevated atmospheric CO2 concentration and the interaction of warming effects on rice photosynthesis
Abstract：In order to study the effect of CO2 enrichment and temperature increase on photosynthesis of rice, rice (Oryza sativa L.) cultivar Nanjing 9108 was used as experimental material, and the open CO2 enrichment and temperature increase platform (Free Air CO2 Enrichment And the effects of CO2 concentration and temperature on the stomatal conductance, net photosynthetic rate, transpiration rate and water use efficiency of rice leaves under the conditions of CO2 concentration and temperature rise were studied in rice culture experiment with simulated CO2 concentration and temperature rise. The change. The results showed that the increase of CO2 concentration increased 4.13% and 13.89% in the upper and lower leaves of the stomatal conductance, but decreased significantly at 5.74% lower than that of CK. The net photosynthetic rate was the same as that of CK The results showed that the uptake rate was 6.37%, 3.46% and 11.46%, respectively. The water use efficiency increased by 4.33%, respectively, and the water use efficiency was decreased by 2.23%, 2.23% and 11.34%, respectively. 1.73% and 0.07%, the difference was not significant. The upper and lower leaves of the stomatal conductance increased by 74.45%, 73.14% and 48.61%, respectively. The net photosynthetic rate decreased by 7.65%, the median leaf increased by 4.50% and the lower leaf decreased by 0.20% , The difference was not significant; the transpiration rate decreased by 8.02%, 5.00% and 3.75%, respectively, and the difference between the middle and the lower leaves was not significant; the water use efficiency increased by 0.30% 9.19% and 2.67%, the difference was not significant. The interaction between uptake and uptake of leaf was 61.59% and 21.81%, 36.82% lower than that in upper leaf, and the difference was not significant And the net photosynthetic rate decreased by 15.96%, 10.75% and 63.45%, respectively, and the difference was not significant. The transpiration rate decreased by 22.09%, 25.91% and 65.69%, respectively, and the difference was not significant And the water use efficiency increased by 7.81%, 33.72% and 5.53%, respectively, and the difference was not significant. In this study, we established a basis for the further study of rice leaf gas exchange simulation model for further establishment of atmospheric CO2 enrichment and warming interaction.
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