Influences of enhanced ultraviolet radiation (UV B,280-315nm) on accumulation and cycling of Mg and Zn of wheat field ecosystem were investigated under field conditions.UV B radiation increased concentrations of Mg an...Influences of enhanced ultraviolet radiation (UV B,280-315nm) on accumulation and cycling of Mg and Zn of wheat field ecosystem were investigated under field conditions.UV B radiation increased concentrations of Mg and Zn in leaves and stems,and affected concentrations of Mg and Zn in roots and spikes at various developmental stages significantly.The responses of accumulation of Mg and Zn in leaves to UV B radiation were different among developmental stages.Accumulation of Zn in stems were higher than control under 2.54 and 4.25 kJ.m -2 UV B radiation,and lower than control under 5.31 kJ.m -2 UV B radiation.At various developmental stages,UV B radiation significantly reduced accumulation of Mg in stems,roots and spikes,and accumulation of Zn in roots and spikes.UV B radiation significantly decreased accumulation of Mg and Zn in whole plants at various developmental stages.The contribution of biomass to the accumulation of Mg and Zn might be more than that of the concentrations of Mg and Zn.UV B radiation reduced output of Mg and Zn of spring wheat colonies.This might indicate decreases in output input ratio and cycling function of Mg and Zn in wheat field ecosystem.Increases in concentrations of exchangeable Mg and available Zn in soil were the results of decreases in output of Mg and Zn of spring wheat colonies. It might lead to the occurrence of higher storage of Mg and Zn in soil.展开更多
The Liaoji Proterozoic rift is an inter-intracontinenatl rift developed from Archean granite-greenstone tectonic regime and contains many important mineral deposits of U, B, magnesite, Pb-Zn, Au, Ag, Co and P. These d...The Liaoji Proterozoic rift is an inter-intracontinenatl rift developed from Archean granite-greenstone tectonic regime and contains many important mineral deposits of U, B, magnesite, Pb-Zn, Au, Ag, Co and P. These deposits were formed as the result of late mobilization, transportation and concentfation of the previously enriched ore-forming mate- rials in several ore-bearing formations formed during the rift stage. So the metallogeny of these deposits in the rift shows both inheritance and new generation of the ore-forming materials. In future ore-searching practice, attentions should be paid on the studies of the ore-bearing formations in the rift, on the multiple stages of metallogeny and and on multiple derivations of the ore-forming materials.展开更多
目的：对白骨壤果实中微量元素进行测定分析。方法：采用微波消解-电感耦合等离子体发射光谱法（微波消解-ICP-OES法）测定白骨壤果实中Zn、Ni、Fe、Mg、Mn、Cr、Al、V、Cd、As、Cu、Pb、Ba、B共14种微量元素含量。使用电感耦合等离子...目的：对白骨壤果实中微量元素进行测定分析。方法：采用微波消解-电感耦合等离子体发射光谱法（微波消解-ICP-OES法）测定白骨壤果实中Zn、Ni、Fe、Mg、Mn、Cr、Al、V、Cd、As、Cu、Pb、Ba、B共14种微量元素含量。使用电感耦合等离子体发射光谱仪,发射功率1.2 k W,等离子气流量15 L·min^-1,辅助气流量1.5 L·min^-1,雾化气压200 k Pa,泵速15 r·min^-1,进样延迟时间为30 s。结果：白骨壤果实中含有丰富的微量元素Mg、Al、Fe、Mn等,而Cd和As含量极低或未检出。精密度试验的RSD为0.8%-3.6%,加标回收率为96.2%-102.4%。结论：建立的微波消解-ICP-OES分析方法可测定白骨壤果实中多种微量元素,同时为测定其他药材中微量元素的测定提供参考和理论依据。展开更多
文摘Influences of enhanced ultraviolet radiation (UV B,280-315nm) on accumulation and cycling of Mg and Zn of wheat field ecosystem were investigated under field conditions.UV B radiation increased concentrations of Mg and Zn in leaves and stems,and affected concentrations of Mg and Zn in roots and spikes at various developmental stages significantly.The responses of accumulation of Mg and Zn in leaves to UV B radiation were different among developmental stages.Accumulation of Zn in stems were higher than control under 2.54 and 4.25 kJ.m -2 UV B radiation,and lower than control under 5.31 kJ.m -2 UV B radiation.At various developmental stages,UV B radiation significantly reduced accumulation of Mg in stems,roots and spikes,and accumulation of Zn in roots and spikes.UV B radiation significantly decreased accumulation of Mg and Zn in whole plants at various developmental stages.The contribution of biomass to the accumulation of Mg and Zn might be more than that of the concentrations of Mg and Zn.UV B radiation reduced output of Mg and Zn of spring wheat colonies.This might indicate decreases in output input ratio and cycling function of Mg and Zn in wheat field ecosystem.Increases in concentrations of exchangeable Mg and available Zn in soil were the results of decreases in output of Mg and Zn of spring wheat colonies. It might lead to the occurrence of higher storage of Mg and Zn in soil.
文摘The Liaoji Proterozoic rift is an inter-intracontinenatl rift developed from Archean granite-greenstone tectonic regime and contains many important mineral deposits of U, B, magnesite, Pb-Zn, Au, Ag, Co and P. These deposits were formed as the result of late mobilization, transportation and concentfation of the previously enriched ore-forming mate- rials in several ore-bearing formations formed during the rift stage. So the metallogeny of these deposits in the rift shows both inheritance and new generation of the ore-forming materials. In future ore-searching practice, attentions should be paid on the studies of the ore-bearing formations in the rift, on the multiple stages of metallogeny and and on multiple derivations of the ore-forming materials.
文摘目的：对白骨壤果实中微量元素进行测定分析。方法：采用微波消解-电感耦合等离子体发射光谱法（微波消解-ICP-OES法）测定白骨壤果实中Zn、Ni、Fe、Mg、Mn、Cr、Al、V、Cd、As、Cu、Pb、Ba、B共14种微量元素含量。使用电感耦合等离子体发射光谱仪,发射功率1.2 k W,等离子气流量15 L·min^-1,辅助气流量1.5 L·min^-1,雾化气压200 k Pa,泵速15 r·min^-1,进样延迟时间为30 s。结果：白骨壤果实中含有丰富的微量元素Mg、Al、Fe、Mn等,而Cd和As含量极低或未检出。精密度试验的RSD为0.8%-3.6%,加标回收率为96.2%-102.4%。结论：建立的微波消解-ICP-OES分析方法可测定白骨壤果实中多种微量元素,同时为测定其他药材中微量元素的测定提供参考和理论依据。
