为进一步促进国际间医学电影电视、医疗健康保健和远程医疗事业的交流与发展,世界医学与健康电影协会(world association of medical health films,WAMHF)及VIDEOMED基金会每2年举办一届国际医学与健康电影电视节。中国医学教育技术代...为进一步促进国际间医学电影电视、医疗健康保健和远程医疗事业的交流与发展,世界医学与健康电影协会(world association of medical health films,WAMHF)及VIDEOMED基金会每2年举办一届国际医学与健康电影电视节。中国医学教育技术代表团本着"走出去"的宗旨,连续3次参加国际医学与健康电影电视节大会,参展作品均取得良好的成绩(希腊健康女神奖),不仅在世界范围内展示了中国医学教育技术工作者的能力水平,同时,也与国际同行进行了相互交流,共同促进人类健康与医学教育事业进步。展开更多
An understanding of the differences in artificial forest between tree species,slope aspects,and management options in arid environments is fundamentally important for efficient management of these artificial systems;h...An understanding of the differences in artificial forest between tree species,slope aspects,and management options in arid environments is fundamentally important for efficient management of these artificial systems;however,few studies have quantified the spatial and temporal differences in stem radial growth of trees in the arid western Loess Plateau of China.Using dendrochronology,we assessed the growth of three woody species(the native shrub Reaumuria soongorica,the exotic shrub Tamarix ramosissima and tree Platycladus orientalis)by measuring the annual stem radial increment.We also describe the long-term growth trends and responses to climatic factors on slopes with different aspects during periods with and without irrigation.We found that precipitation during the main growing season was significantly positively correlated with ring growth for all three species and both slope aspects.In addition,supplemental water(e.g.,irrigation,rainwater harvesting)greatly relieved drought stress and promoted radial growth.Our results suggest that as the main afforestation species in the Loess Plateau used for soil and water conservation,P.orientalis is more suitable than T.ramosissima under rain-fed conditions.However,a landscape that combined a tree(P.orientalis)with a shrub(R.soongorica)and grassland appears likely to represent the best means of ecological restoration in the arid western Loess Plateau.展开更多
文摘为进一步促进国际间医学电影电视、医疗健康保健和远程医疗事业的交流与发展,世界医学与健康电影协会(world association of medical health films,WAMHF)及VIDEOMED基金会每2年举办一届国际医学与健康电影电视节。中国医学教育技术代表团本着"走出去"的宗旨,连续3次参加国际医学与健康电影电视节大会,参展作品均取得良好的成绩(希腊健康女神奖),不仅在世界范围内展示了中国医学教育技术工作者的能力水平,同时,也与国际同行进行了相互交流,共同促进人类健康与医学教育事业进步。
基金funded by the National Natural Science Foundation of China(Grant No.41471082)
文摘An understanding of the differences in artificial forest between tree species,slope aspects,and management options in arid environments is fundamentally important for efficient management of these artificial systems;however,few studies have quantified the spatial and temporal differences in stem radial growth of trees in the arid western Loess Plateau of China.Using dendrochronology,we assessed the growth of three woody species(the native shrub Reaumuria soongorica,the exotic shrub Tamarix ramosissima and tree Platycladus orientalis)by measuring the annual stem radial increment.We also describe the long-term growth trends and responses to climatic factors on slopes with different aspects during periods with and without irrigation.We found that precipitation during the main growing season was significantly positively correlated with ring growth for all three species and both slope aspects.In addition,supplemental water(e.g.,irrigation,rainwater harvesting)greatly relieved drought stress and promoted radial growth.Our results suggest that as the main afforestation species in the Loess Plateau used for soil and water conservation,P.orientalis is more suitable than T.ramosissima under rain-fed conditions.However,a landscape that combined a tree(P.orientalis)with a shrub(R.soongorica)and grassland appears likely to represent the best means of ecological restoration in the arid western Loess Plateau.
