Tree-ring chronologies were developed for Sabina saltuaria and Abies faxoniana in mixed forests in the Qionglai Mountains of the eastern Tibetan Plateau.Climate-growth relationship analysis indicated that the two co-e...Tree-ring chronologies were developed for Sabina saltuaria and Abies faxoniana in mixed forests in the Qionglai Mountains of the eastern Tibetan Plateau.Climate-growth relationship analysis indicated that the two co-exist-ing species reponded similarly to climate factors,although S.saltuaria was more sensitive than A.faxoniana.The strong-est correlation was between S.saltuaria chronology and regional mean temperatures from June to November.Based on this relationship,a regional mean temperature from June to November for the period 1605-2016 was constructed.Reconstruction explained 37.3%of the temperature variance during th period 1961-2016.Six major warm periods and five major cold periods were identified.Spectral analysis detected significant interannual and multi-decadal cycles.Reconstruction also revealed the influence of the Atlantic Multi-decadal Oscillation,confirming its importance on climate change on the eastern Tibetan Plateau.展开更多
By taking the north zone of Qionglai City constructing "world modern garden city" for example, the paper analyzed the concept of garden city, location situation and development of Qionglai City. After analys...By taking the north zone of Qionglai City constructing "world modern garden city" for example, the paper analyzed the concept of garden city, location situation and development of Qionglai City. After analysis of tourist location advantage of Qionglai City, the vital significance for overall layout of urban landscape was emphasized. Furthermore, strategies for concept planning of the north zone of Qionglai City had been illustrated from the perspectives of landscape shaping, ecological landscape and green land system structure. It emphasized that the overall landscape should be guided by "city in the field and garden in the city", pay attention to co-existence between ecological group garden and aggregation group, and highlight resources advantage of collection area of ecological landscapes. In terms of landscape shaping, it stressed unity, ecology, regionality and character. In terms of characteristic creation, discussion had been conducted from three aspects which were garden city demonstration line, residential landscape and waterfront shoreline. It emphasized that, during construction of world modern garden city, it should make the main line of city image clear, respect culture; well deal with the relations between city and village, between human and environment, and between function and image; and build livable ecological urban place, so as to protect environment, explore city feature and build city image.展开更多
[Objective] Many strata emerge in the high-quality tea producing area in Qionglai Mountains,which belongs to Mesozoic Cretaceous(K),Mingshan Fm(E1-2mn)and Dayi conglomerate Team(N)of Cenozoic Tertiary System as well a...[Objective] Many strata emerge in the high-quality tea producing area in Qionglai Mountains,which belongs to Mesozoic Cretaceous(K),Mingshan Fm(E1-2mn)and Dayi conglomerate Team(N)of Cenozoic Tertiary System as well as Quaternary System(Q).Analysis on the migrating features of soil heavy metal from each stratum to tea leaves showed that the enrichment ability of elements was Cu>Cd>Zn>Ni>Hg>As>Cr>Pb.By comparing the soil background values with the soil base values of Sichuan hilly area and Chengdu economic region,it could be concluded that Cd,Hg,Mo,Pb and Se were enriched,and other metal elements existed at a level close to that of the comparing areas.The pH was a little acidic,and high quality tea cultivation could be developed here at present.With the increase of human activities,the environment of study area tends to deteriorate.Therefore,land planning and use should be reasonable.The government should control the environment nearby and prevent pollution.展开更多
基金This study was supported by the National Key Research and Development Program of China(No.2018YFA0605601)Hong Kong Research Grants Council(No.106220169)+1 种基金the National Natural Science Foundation of China(Nos.41671042,42077417,42105155,and 42201083)the National Geographic Society(No.EC-95776R-22).
文摘Tree-ring chronologies were developed for Sabina saltuaria and Abies faxoniana in mixed forests in the Qionglai Mountains of the eastern Tibetan Plateau.Climate-growth relationship analysis indicated that the two co-exist-ing species reponded similarly to climate factors,although S.saltuaria was more sensitive than A.faxoniana.The strong-est correlation was between S.saltuaria chronology and regional mean temperatures from June to November.Based on this relationship,a regional mean temperature from June to November for the period 1605-2016 was constructed.Reconstruction explained 37.3%of the temperature variance during th period 1961-2016.Six major warm periods and five major cold periods were identified.Spectral analysis detected significant interannual and multi-decadal cycles.Reconstruction also revealed the influence of the Atlantic Multi-decadal Oscillation,confirming its importance on climate change on the eastern Tibetan Plateau.
文摘By taking the north zone of Qionglai City constructing "world modern garden city" for example, the paper analyzed the concept of garden city, location situation and development of Qionglai City. After analysis of tourist location advantage of Qionglai City, the vital significance for overall layout of urban landscape was emphasized. Furthermore, strategies for concept planning of the north zone of Qionglai City had been illustrated from the perspectives of landscape shaping, ecological landscape and green land system structure. It emphasized that the overall landscape should be guided by "city in the field and garden in the city", pay attention to co-existence between ecological group garden and aggregation group, and highlight resources advantage of collection area of ecological landscapes. In terms of landscape shaping, it stressed unity, ecology, regionality and character. In terms of characteristic creation, discussion had been conducted from three aspects which were garden city demonstration line, residential landscape and waterfront shoreline. It emphasized that, during construction of world modern garden city, it should make the main line of city image clear, respect culture; well deal with the relations between city and village, between human and environment, and between function and image; and build livable ecological urban place, so as to protect environment, explore city feature and build city image.
基金Supported by International Special Funds to Finance the Construction of Modern Agricultural Technology SystemYouth Science and Technology Foundation of Sichuan Province(09ZQ026-019)Economic and Trade Commission Project of Technological Innovationin Sichuan Province(High Technology Innovation of Famous GreenTea Flavor)
文摘[Objective] Many strata emerge in the high-quality tea producing area in Qionglai Mountains,which belongs to Mesozoic Cretaceous(K),Mingshan Fm(E1-2mn)and Dayi conglomerate Team(N)of Cenozoic Tertiary System as well as Quaternary System(Q).Analysis on the migrating features of soil heavy metal from each stratum to tea leaves showed that the enrichment ability of elements was Cu>Cd>Zn>Ni>Hg>As>Cr>Pb.By comparing the soil background values with the soil base values of Sichuan hilly area and Chengdu economic region,it could be concluded that Cd,Hg,Mo,Pb and Se were enriched,and other metal elements existed at a level close to that of the comparing areas.The pH was a little acidic,and high quality tea cultivation could be developed here at present.With the increase of human activities,the environment of study area tends to deteriorate.Therefore,land planning and use should be reasonable.The government should control the environment nearby and prevent pollution.
