DOI: 10.3724/SP.J.1011.2011.00794

Chinese Journal of Eco-Agriculture (中国生态农业学报) 2011/19:4 PP.794-798

Effects of enriched atmospheric CO2 on the growth and uptake of N and C in mung bean

The inter-governmental panel on climate change projects that atmospheric [CO2] will reach 550 μmol·mol-1 by 2050. Elevation of [CO2] will invariably influence the growth and yield of mung bean. Research on the growth and uptake of C and N in mung bean in response to elevated [CO2] will benefit the study of the balance of nutrients under future climate change. This could provide the scientific basis for high-value mung bean production through the implementation of climate-oriented policies. Contrary to recent studies of crop response to elevated [CO2] in chambers and other enclosures, FACE (Free Air CO2 Enrichment) was used in this study. In the study, mung bean was planted under ambient [CO2] of 389±40 μmol∙mol-1 and FACE regimes of 550±60 μmol∙mol-1, respectively. The results showed that leaf, stem, pod, root, above-ground part and total biomass, and root/shoot ratio increased under elevated [CO2]. Elevated [CO2] increased the weight of leaf by 17.15%~80.20% and that of stem by 25.29%~97.38%, compared with ambient [CO2]. Under FACE, the weight of pod significantly increased by 24.50% at harvest. The weight of root increased by 34.17% and 60.41% at pod-filling and harvest stages, respectively. Elevated [CO2] increased above-ground biomass weight by 12.90%~83.09%. Total biomass weight increased by 13.98% and 25.79% at pod-filling and harvest stages, respectively. Root/shoot ratio increased by 18.68% at pod-filling stage. N concentration in above-ground part of mung bean decreased by 10.39%~21.06% under FACE compared with am-bient [CO2]. Elevated [CO2] increased C concentration and C/N ratio by 0.41%~1.13% and 12.23%~26.68%, respectively. The change in seed N and C concentration and C/N ratio was insignificant. N and C uptake by above-ground part of mung bean increased by 1.99%~50.87% and 14.43%~92.69%, respectively. Biomass increase suggested higher crop assimilation of C and absorption of soil N under elevated [CO2] conditions. This implied that mung bean production could be benefitted from increased levels of soil fertilization which ensures sufficient nutrient supply under elevated [CO2] conditions.

Key words:Elevated [CO2] condition, Mung bean, N and C concentration, N and C uptake

ReleaseDate:2014-07-21 15:53:22

[1] Prentice I C, Farquahar G D, Fasham M R, et al. The carbon cycle and atmospheric carbon dioxide[M]//Houghton J T, Ding Y, Griggs D J, et al. Climate change 2001: The scientific basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge: Cambridge University Press, 2001: 183-237

[2] 谢祖彬, 朱建国, 张雅丽, 等. 水稻生长及其体内C、N、P组成对开放式空气CO2浓度增高和N、P施肥的响应[J]. 应用生态学报, 2002, 13(10): 1223-1230

[3] Kim H Y, Lieffering M, Miura S, et al. Growth and nitrogen uptake of CO2 enriched rice under field con-ditions[J]. New Phytologist, 2001,150(2): 223-229

[4] 马红亮, 朱建国, 谢祖彬, 等. 开放式空气CO2浓度升高对冬小麦生长和N吸收的影响[J]. 作物学报, 2005, 131(12): 1634-1639

[5] 郝兴宇, 林而达, 杨锦忠, 等. 自由大气CO2浓度升高对夏大豆生长与产量的影响[J]. 生态学报, 2009, 29(9): 4595-4603

[6] 郝兴宇, 李萍, 林而达, 等. 大气CO2浓度升高对谷子生长发育与光合生理的影响[J]. 核农学报, 2010, 24(3): 589-593

[7] 南京农学院. 土壤农化分析[M]. 北京: 农业出版社, 1982: 191-195

[8] 鲍士旦. 土壤农化分析[M]. 北京: 中国农业出版社, 2000: 258-260

[9] Kimball B A. Influence of elevated CO2 on crop yield[M]//Enoch H Z, Kimball B A. Carbon dioxide enrichment of greenhouse crops. Boca Raton: CRC Press Inc, 1986: 105-115

[10] Ainsworth E A, Long S P. What have we learned from 15 years of free-air CO2 enrichment (face)? A meta-analytic review of the responses of photosynthesis, canopy properties and plant production to rising CO2[J]. New Phytologist, 2005, 165(2): 351-372

[11] Kimball B A, Pinter P J, Wall G W, et al. Comparisons of responses of vegetation to elevated carbon dioxide in free-air and open-top chamber facilities[M]//Allen L H, Kirkham M B, Olszyk D M. Advances in carbon dioxide research. Wisconsin: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 1997: 113-130

[12] Bazzaz F A, Fajer E D. Plant life in a CO2-rich world[J]. Scientific American, 1992, 266: 68-74

[13] Kimball B A. Carbon dioxide and agricultural yield: An assemblage and analysis of 430 prior observations[J]. Agronomy Journal, 1982, 75(5): 779-788

[14] Ainsworth E A, Davey P A, Bernacchi C J, et al. A meta-analysis of elevated [CO2] effects on soybean (Glycine max) physiology, growth and yield [J]. Global Change Biology, 2002, 8(8): 695-709

[15] Lüscher A, Hartwig U A, Suter D, et al. Direct evidence that aymbiotic N2 fixation in fertile grassland is an important trait for a strong response of plants to elevated at-mospheric CO2[J]. Global Change Biology, 2000, 6(6): 655-662

[16] Ainsworth E A, Rogers A, Leakey A D B, et al. Does elevated atmospheric [CO2] alter diurnal C uptake and the balance of C and N metabolites in growing and fully expanded soybean leaves?[J]. Journal of Experimental Botany, 2007, 58(3): 579-591

[17] Rogers A, Gibon Y, Stitt M, et al. Increased C availability at elevated carbon dioxide concentration improves N assimila-tion in a legume[J]. Plant, Cell and Environment, 2006, 29(8): 1651-1658

[18] 蒋跃林, 张庆国, 张仕定, 等. 大气CO2浓度升高对大豆根瘤量及其固氮活性的影响[J]. 大豆科学, 2006, 25(1): 53-57

[19] 马红亮, 朱建国, 谢祖彬, 等. CO2浓度升高对水稻生物量及C、N吸收分配的影响[J]. 中国生态农业学报, 2005, 13(3): 38-41

[20] 马红亮, 朱建国, 谢祖彬, 等. 开放式空气CO2浓度升高对冬小麦P、K吸收和C︰N, C︰P比的影响[J]. 农业环境科学学报, 2005, 24(6): 1192-1198

[21] 李伏生, 康绍忠, 张富仓. 大气CO2浓度和温度升高对作物生理生态的影响[J]. 应用生态学报, 2002, 13(9): 1169-1173

[22] Norby R J, Wullschleger S D, Gunderson C A, et al. Tree responses to rising CO2 in field experiments: Implications for the future forest[J]. Plant, Cell and Environment, 1999, 22(6): 683-714

[23] Zerihun A, Gutschick V P, Bassirirad H. Compensatory roles of nitrogen uptake and photosynthetic N-use efficiency in determining plant growth response to elevated CO2: Evaluation using a functional balance model[J]. Annals of Botany, 2000, 86(4): 723-730

[24] Bloom A J, Burger M, Aaensio J S R, et al. Carbon dioxide enrichment inhibits nitrate assimilation in wheat and Arabidopsis[J]. Science, 2010, 328(5980): 899-903

[25] Hart S C, Nason G E, Myrold D D, et al. Dynamics of gross nitrogen transformations in an old-growth forest: The carbon connection[J]. Ecology, 1994, 75(4): 880-891