| 不同CO2浓度和氮水平对冬小麦光合和生长特性的影响 |
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| 引用本文： | 吴浩,张雪松,王丹.不同CO2浓度和氮水平对冬小麦光合和生长特性的影响[J].浙江农业学报,2022,34(12):2594. |
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| 作者姓名： | 吴浩 张雪松 王丹 |
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| 作者单位： | 南京信息工程大学 应用气象学院,江苏 南京 210000 |
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| 基金项目： | 国家自然科学基金(31500503);国家自然科学基金(31770485);江苏省自然科学基金(BK20150894) |
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| 摘 要： | 为揭示高CO2浓度处理下,不同氮水平对冬小麦光合作用、生物量积累和产量的影响,利用开顶式气室(OTC),以冬小麦品种宁麦13为试验材料,开展不同CO2浓度(C,环境CO2浓度;T,高CO2浓度,比环境CO2浓度高200 μmol·mol-1)和氮水平(LN,低氮,90 kg·hm-2;HN,高氮,240 kg·hm-2)的交互试验,测定不同处理下不同生育期冬小麦的光合特性、叶片碳氮含量、地上部生物量和产量。结果表明,CO2浓度升高提高了冬小麦的净光合速率,在低氮水平下增幅为78.4%,在高氮水平下增幅为77.2%。在开花期和灌浆期,高氮水平对冬小麦地上部干物质量积累有明显促进作用。各处理中,C-LN的产量最低,T-HN的产量最高,且二者差异显著(P<0.05)。以上结果说明,在未来CO2浓度升高条件下,可通过增施适量的氮肥提升冬小麦的生物量和产量。
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| 关 键 词： | 冬小麦 高CO2浓度 施氮水平 光合生理 生物量 产量 |
| 收稿时间： | 2021-09-26 |
Effects of different CO2 concentration and nitrogen rates on photosynthesis and growth of winter wheat |
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| WU Hao,ZHANG Xuesong,WANG Dan.Effects of different CO2 concentration and nitrogen rates on photosynthesis and growth of winter wheat[J].Acta Agriculturae Zhejiangensis,2022,34(12):2594. |
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| Authors: | WU Hao ZHANG Xuesong WANG Dan |
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| Affiliation: | School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210000, China |
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| Abstract: | In order to elucidate the interactive effects of different nitrogen rates on photosynthesis, biomass accumulation and yield of winter wheat under the elevated CO2 concentration, the winter wheat variety Ningmai 13 was selected as the test material, and an experiment with different CO2 concentrations (C, ambient CO2 concentration; T, higher CO2 concentration, ambient CO2 concentration+200 μmol·mol-1) and different N levels (LN, low nitrogen, 90 kg·hm-2; HN, high nitrogen, 240 kg·hm-2) was conducted, and the photosynthetic characteristics, carbon and nitrogen content in leaves, biomass and yield of winter wheat at different growth stages under different treatments were measured. It was shown that the higher CO2 concentration increased the net photosynthetic rate of winter wheat by 78.4% under the low nitrogen level and 77.2% under the high nitrogen level. At the flowering stage and the filling stage, high nitrogen level increased the above-ground biomass accumulation of winter wheat. Among all the treatments, the yield of C-LN was the smallest, yet the yield of T-HN was the highest, and the difference between them was significant (P<0.05). Therefore, it was inferred that under the elevated CO2 concentration in the future, the biomass accumulation and yield of winter wheat could be increased by increasing the application rate of nitrogen fertilizer. |
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| Keywords: | winter wheat high CO2 concentration nitrogen application level photosynthetic physiology biomass yield |
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