| 1 | Leaf photosynthesis and yield components of mung bean under fully open-air elevated[CO_2]显示文摘Mung bean(Vigna radiata L.) has the potential to establish symbiosis with rhizobia,and symbiotic association of soil micro flora may facilitate the photosynthesis and plant growth response to elevated[CO_2].Mung bean was grown at either ambient CO_2 400 μmol mol^(-1) or[CO_2]((550+17) μmol mol^(-1)) under free air carbon dioxide enrichment(FACE) experimental facility in North China.Elevated[CO_2]increased net photosynthetic rate(P_n),water use efficiency(WUE) and the non-photochemical quenching(NPQ) of upper most fully-expanded leaves,but decreased stomatal conductance(G_s),intrinsic efficiency of PSII(F_v '/F_m'),quantum yield of PSII(φ_(PSll)) and proportion of open PSII reaction centers(q_p).At elevated[CO_2],the decrease of F_v'/F_m',φ_(PSII),q_p at the bloom stage were smaller than that at the pod stage.On the other hand,P_n was increased at elevated[CO_2]by 18.7 and 7.4%at full bloom(R2) and pod maturity stages(R4),respectively.From these findings,we concluded that as a legume despite greater nutrient supply to the carbon assimilation at elevated[CO_2],photosynthetic capacity of mung bean was still suppressed under elevated[CO_2]particularly at pod maturity stage but plant biomass and yield was increased by 11.6 and 14.2%,respectively.Further,these findings suggest that even under higher nutrient acquisition systems such as legumes,nutrient assimilation does not match carbon assimilation under elevated[CO_2]and leads photosynthesis down-regulation to elevated[CO_2]. | GAO Ji HAN Xue Saman Seneweera LI Ping ZONG Yu-zheng DONG Qi LIN Er-da HAO Xing-yu | 2015 | Journal of Integrative Agriculture2015，14，5： | 6 |
| 4 | Content of Nutritional Elements in Sudangrass and Ryegrass Determined by ICP-AES显示文摘The sudangrass(Sorghumsudanense) and ryegrass(Lolium multiflorum L.) rotation is a newtype of cropping system,which has developed rapidly in recent years in the south of China.The contents ofnutritional elements for forage grass in the sudangrass and ryegrass rotation system were determined by ICP-AES.The results showed that there were abundant and essential nutritional elements for ani mals in sudangrassand ryegrass.The contents of P,K,Ca,Mg,S,Fe,B,Cu,Zn and Mn for sudangrass were 0.20 %~0.29 %,1.94 %~2.57 %,0.62 %~0.97 %,0.39 %~0.69 %,0.12 %~0.18 %,108.35 ~180.12,3.04 ~5.96,6.17 ~10.02,20.37 ~31.36 and 46.80 ~101.29 mg.kg-1,respectively.The contents of P,K,Ca,Mg,S,Fe,B,Cu,Zn,Mn for ryegrass were 0.39 %~0.70 %,3.77 %~5.07 %,0.61 %~0.84 %,0.28 %~0.47 %,0.32 %~0.41 %,291.65 ~632.20,2.13 ~3.23,13.29 ~15.19,30.73 ~42.98 and 92.08 ~156.04 mg.kg-1,respectively,and there were differences between various periods in nutritional elements inthe two forage grasses.The application of ICP-AES could reflect fast and efficiently the content of nutritionalelements for forage grass as ani mals feed. | LI Wen-xi LU Jian-wei Saman P Seneweera WU Ji CHEN Fang LU Jun-ming LI Xiao-kun | 2011 | 光谱学与光谱分析2011，31，9： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员