林相圖 的英文怎麼說
中文拼音 [līnxiāngtú]
林相圖
英文
forest form map-
Wh en you visit the shaoxing garden, you can experience and observe the history pulse of shaoxing, appreciate the folk - custom, attain abundant historical information. guided with the theory of " sustainable development " and ecological principles, this paper pinpoints the shaoxing ' s culture feature and development situation, analyses and researches the modern landscape service objects and content and the shaoxing development of cityscape, tries to establish the green life net, emphasises the importance of landscape plants, strengthens the design of city " soft landscape ", enhances the nature landscape. this paper with the balance of city ecosystem is a foundation, insisting the combination of ecological culture and ecological environment, establishes the thought of a city green space system of reasonable layout and complete construction, and attempts to guide the development of shaoxing landscape architecture and reaches the target of a ecological garden city
提出觀紹興園林，可以體察紹興的歷史脈搏，領略紹興的民俗風情，獲得豐富的歷史知識；本文針對紹興園林的文化特色和現在發展狀況，以「可持續發展」理論和生態學原理為指導，通過對現代園林服務對象與內容及紹興城市園林建設的分析與研究，提出建立綠色生活網；充分發揮園林植物在城市景觀規劃設計中的重要性；加強城市「軟質景觀」的規劃設計；增加城市自然景觀；以城市生態平衡為基礎；堅持生態文化和生態環境相結合，建立以布局合理、結構完整的城市綠地系統的思想，試圖引導紹興現代園林景觀建設，突出紹興現代園林的地域文化特色，實現紹興生態園林城市的目標。Harold bloom, a monumental and legendary figure of literary criticism at yale university, a name that cannot be avoided in poetry criticism, is one of the strongest and definitely the most prolific critics of his generation or of several past generations. professor xu jing, correspondent of foreign literature studies, interviewed professor bloom in may 2006. this interview focuses on his theory of poetry that was explosively brought forth in the 1970s by his famous tetralogy : the anxiety of influence, a map of misreading, kabbalah and criticism, and poetry and repression. bloom regards his theory of " the anxiety of influence " as his most important contribution to literary criticism, and uses " dancing " to explain his famous yet baffling six rations of " misprision. " always preoccupied with his own theory, bloom here again traces the precursors of emily dickinson and makes a brief comparison between walt whitman and wallace stevens. looking back to his past, bloom gives a summation of his life ' s trajectory as a critic : a revivalist of romantic poetry, a theoretician of poetry, and a critic for the general public. bloom began his career as a critic of british romantic literature in the afterglow of the new criticism. in the 1970s, bloom brought forth his explosive " theory of poetry " in the tetralogy publised in very quick succession in the 1970s. since the 1980s, bloom has become less technical and hopes to reach a wider readership. his literary criticism and what he calls his " criticism of religion " for the general public have made harold bloom a household name in america as well as in the world. at present, the 76 - year - old harold bloom is intensely engaged in the writing of what he hopes to be his masterpiece, the anatomy of influence, which is to be published in 2008 by princeton university press
哈羅德?布魯姆教授是耶魯大學具有里程碑意義和傳奇色彩的文學批評家，一個詩歌批評界的一個不可迴避的名字，是他那一代人或幾代人中最猛烈的、也無疑是最多產的批評家之一.本刊特約記者徐靜於2006年5月對布魯姆教授進行了采訪.本次訪談的重點是布魯姆在20世紀70年代以《影響的焦慮》 、 《誤讀的地圖》 、 《卡巴拉與批評》 、 《詩歌與壓抑》四部曲的形式相繼提出的、具有爆炸性的"詩歌理論" .布魯姆認為"影響的焦慮"是他對文學批評最重要的貢獻，並用舞蹈這一形象的比喻來解釋了他那著名的卻常常令人困惑的關于"誤讀"的"六個定量" .在訪談中，布魯姆還追溯了幾位對愛米莉?狄金森頗有影響的前輩詩人，並簡單比較了惠特曼和史蒂文斯.布魯姆將他的批評生涯概括為三個階段:浪漫主義詩歌的復興者，詩歌理論家以及面向大眾的批評者.在新批評的余輝中，布魯姆以對英國浪漫主義詩歌的批評開始了其批評生涯. 20世紀70年代布魯姆提出了他那爆炸性的、以四部曲的形式相繼問世的"詩歌理論" .進入80年代后，布魯姆的批評不再艱深難懂，他希望能擁有更廣大的讀者群.他為普通大眾所寫的文學批評及"宗教批評" （布魯姆語）使得哈羅德?布魯姆成為了美國以及全世界的一個家喻戶曉的名字.目前， 76歲的布魯姆正全力寫作《影響的解剖》一書，將於2008年由普林斯頓大學出版社出版Abstract : soil incubation experiments were conducted in lab to delineate the effect of soil temperature and soil water content on soil respirations in broad - leaved / korean pine forest ( mountain dark brown forest soil ), dark coniferous forest ( mountain brown coniferous forest soil ) and erman ' s birch forest ( mountain soddy forest soil ) in changbai mountain in september 2001. the soil water content was adjusted to five different levels ( 9, 21, 30, 37 and 43 ) by adding certain amount of water into the soil cylinders, and the soil sample was incubated at 0, 5, 15, 25 and 35 for 24 h the results indicated that in broad - leaved / korean pine forest the soil respiration rate was positively correlated to soil temperature from 0 to 35. soil respiration rate increased with increase of soil water content within the limits of 21 to 37, while it decreased with soil water content when water content was over the range. the result suggested the interactive effects of temperature and water content on soil respiration. there were significant differences in soil respiration among the various forest types. the soil respiration rate was highest in broad - leaved / korean pine forest, middle in erman ' s birch forest and the lowest in dark coniferous forest. the optimal soil temperature and soil water content for soil respiration was 35 and 37 in broad - leaved / korean pine forest, 25 and 21 in dark coniferous forest, and 35 and 37 in erman ' s birch forest. because the forests of broad - leaved / korean pine, dark coniferous and erman ' s birch are distributed at different altitudes, the soil temperature had 4 - 5 variation in different forest types during the same period. thus, the soil respiration rates measured in brown pine mountain soil were lower than those in dark brown forest and those measured in mountain grass forest soil were higher than those in brown pine mountain soil
文摘:為了研究土壤溫度和土壤含水量對闊葉紅松林（山地暗棕壤） 、雲冷杉暗針葉林（山地棕針葉林土壤）和岳樺林（生草森林土）的土壤呼吸的影響，於2001年9月在長白山進行了土壤實驗.利用增加土壤樣柱的含水量，將土壤含水量分為9 ， 、 21 、 30 、 37和43 5個等級，土壤樣品分別在0 、 5 、 15 、 25和35的溫度下保持24小時.闊葉紅松林土壤在0 （ 35范圍內，土壤呼吸速率與溫度呈正相關.在一定的含水量范圍內（ 21 （ 37 ） ，土壤呼吸隨含水量的增加而升高，當含水量超出該范圍，土壤呼吸速率則隨含水量的變化而降低.土壤溫度和水分對土壤呼吸作用存在明顯的交互作用.不同森林類型土壤呼吸作用強弱存在顯著差異，大小順序為闊葉紅松林>岳樺林>雲冷杉暗針葉林.紅松闊葉林土壤呼吸作用的最佳條件是土壤溫度35 ，含水量37 ;雲冷杉暗針葉林下的山地棕色針葉土壤呼吸作用的最佳條件是25 ， 21 ;岳樺林土壤呼吸作用的最佳條件是35 ，含水量37 .但是，由於長白山闊葉紅松林，雲冷杉林和岳樺林處在不同的海拔帶上，同期不同森林類型土壤溫度各不相同，相差4 ~ 5 ，所以野外所測的同期的山地棕色針葉林土呼吸速率應低於暗棕色森林土呼吸速率，山地生草森林土呼吸速率應高於山地棕色針葉林土的呼吸速率.圖2表1參25Soil incubation experiments were conducted in lab to delineate the effect of soil temperature and soil water content on soil respirations in broad - leaved / korean pine forest ( mountain dark brown forest soil ), dark coniferous forest ( mountain brown coniferous forest soil ) and ermans birch forest ( mountain soddy forest soil ) in changbai mountain in september 2001. the soil water content was adjusted to five different levels ( 9, 21, 30, 37 and 43 ) by adding certain amount of water into the soil cylinders, and the soil sample was incubated at 0, 5, 15, 25 and 35 for 24 h the results indicated that in broad - leaved / korean pine forest the soil respiration rate was positively correlated to soil temperature from 0 to 35. soil respiration rate increased with increase of soil water content within the limits of 21 to 37, while it decreased with soil water content when water content was over the range. the result suggested the interactive effects of temperature and water content on soil respiration. there were significant differences in soil respiration among the various forest types. the soil respiration rate was highest in broad - leaved / korean pine forest, middle in ermans birch forest and the lowest in dark coniferous forest. the optimal soil temperature and soil water content for soil respiration was 35 and 37 in broad - leaved / korean pine forest, 25 and 21 in dark coniferous forest, and 35 and 37 in ermans birch forest. because the forests of broad - leaved / korean pine, dark coniferous and ermans birch are distributed at different altitudes, the soil temperature had 4 - 5 variation in different forest types during the same period. thus, the soil respiration rates measured in brown pine mountain soil were lower than those in dark brown forest and those measured in mountain grass forest soil were higher than those in brown pine mountain soil
為了研究土壤溫度和土壤含水量對闊葉紅松林（山地暗棕壤） 、雲冷杉暗針葉林（山地棕針葉林土壤）和岳樺林（生草森林土）的土壤呼吸的影響，於2001年9月在長白山進行了土壤實驗.利用增加土壤樣柱的含水量，將土壤含水量分為9 ， 、 21 、 30 、 37和43 5個等級，土壤樣品分別在0 、 5 、 15 、 25和35的溫度下保持24小時.闊葉紅松林土壤在0 （ 35范圍內，土壤呼吸速率與溫度呈正相關.在一定的含水量范圍內（ 21 （ 37 ） ，土壤呼吸隨含水量的增加而升高，當含水量超出該范圍，土壤呼吸速率則隨含水量的變化而降低.土壤溫度和水分對土壤呼吸作用存在明顯的交互作用.不同森林類型土壤呼吸作用強弱存在顯著差異，大小順序為闊葉紅松林>岳樺林>雲冷杉暗針葉林.紅松闊葉林土壤呼吸作用的最佳條件是土壤溫度35 ，含水量37 ;雲冷杉暗針葉林下的山地棕色針葉土壤呼吸作用的最佳條件是25 ， 21 ;岳樺林土壤呼吸作用的最佳條件是35 ，含水量37 .但是，由於長白山闊葉紅松林，雲冷杉林和岳樺林處在不同的海拔帶上，同期不同森林類型土壤溫度各不相同，相差4 ~ 5 ，所以野外所測的同期的山地棕色針葉林土呼吸速率應低於暗棕色森林土呼吸速率，山地生草森林土呼吸速率應高於山地棕色針葉林土的呼吸速率.圖2表1參25Abstract : the restoration of the riparian vegetation disturbed by human activities is one of the hotspots of watershed ecology. through interpreting the images of remote sensing in 1985 and 1999, the basic information of forest resources of lushuihe forest bureau, which is a typical forest area of changbai mountain, was obtained with support of gis. by dividing land covers of lushuihe area into 10 types ( water body, residential land, stump land, farming land, wetland, mature conifer forest, midlife conifer forest, mature broadleaf forest, midlife broadleaf forest, and man - made young forest ) and dividing the riparian zone into four buffers ( in turn, 1000, 2000, 3000, 4000 m away from the river ), the changes of riparian forest resources during 1985 - 1999 were analyzed. the results showed that the deforestation intension has obviously decreased and the whole environment has been evidently improved, but the riparian ecosystem was still flimsy. in buffer 1, 2, 3, the area of midlife conifer forest increased largely, but the areas of other types of land covers all decreased. midlife conifer forest had a comparatively good status in the three buffers. in buffer 4, midlife conifer forest, mature conifer forest, and mature broadleaf forest formed a forest - age rank that is helpful to stabilize the forest ecosystem and exert its functions. area percentage of wetland decreased in buffer 1, buffer 2, and buffer 3, even in buffer 4 in which forest ecosystem rehabilitated comparatively well, so protecting and rehabilitating wetland is a very difficult task
文摘:本文對兩期遙感圖像進行解譯，並在gis支持下提取露水河林業局主要河流兩岸各緩沖區森林資源信息，經分析得到各類地物在1985年及1999年的變化趨勢.結果表明:在河流沿岸對森林的採伐強度1999年較1985年明顯減小，整體生態環境較1985年有所改善.在緩沖區1 ， 2 ， 3除中齡針葉林大幅度增加外，其它地物類型面積均減少，由此可以看出，在這三個緩沖區內針葉林得到了較好的恢復.在緩沖區4內，中齡針葉林、成熟針葉林、成熟闊葉林形成一個林齡梯隊，有利於森林生態系統的穩定與功能的發揮，十五年間緩沖區4受到的干擾相對較小.濕地數量在四個緩沖區內均有所減少，雖然在緩沖區4內森林生態系統恢復的較好，但濕地面積仍有所減少，說明保護及恢復濕地資源是一件非常艱巨的任務，必須引起高度重視.圖5表2參12The restoration of the riparian vegetation disturbed by human activities is one of the hotspots of watershed ecology. through interpreting the images of remote sensing in 1985 and 1999, the basic information of forest resources of lushuihe forest bureau, which is a typical forest area of changbai mountain, was obtained with support of gis. by dividing land covers of lushuihe area into 10 types ( water body, residential land, stump land, farming land, wetland, mature conifer forest, midlife conifer forest, mature broadleaf forest, midlife broadleaf forest, and man - made young forest ) and dividing the riparian zone into four buffers ( in turn, 1000, 2000, 3000, 4000 m away from the river ), the changes of riparian forest resources during 1985 - 1999 were analyzed. the results showed that the deforestation intension has obviously decreased and the whole environment has been evidently improved, but the riparian ecosystem was still flimsy. in buffer 1, 2, 3, the area of midlife conifer forest increased largely, but the areas of other types of land covers all decreased. midlife conifer forest had a comparatively good status in the three buffers. in buffer 4, midlife conifer forest, mature conifer forest, and mature broadleaf forest formed a forest - age rank that is helpful to stabilize the forest ecosystem and exert its functions. area percentage of wetland decreased in buffer 1, buffer 2, and buffer 3, even in buffer 4 in which forest ecosystem rehabilitated comparatively well, so protecting and rehabilitating wetland is a very difficult task
本文對兩期遙感圖像進行解譯，並在gis支持下提取露水河林業局主要河流兩岸各緩沖區森林資源信息，經分析得到各類地物在1985年及1999年的變化趨勢.結果表明:在河流沿岸對森林的採伐強度1999年較1985年明顯減小，整體生態環境較1985年有所改善.在緩沖區1 ， 2 ， 3除中齡針葉林大幅度增加外，其它地物類型面積均減少，由此可以看出，在這三個緩沖區內針葉林得到了較好的恢復.在緩沖區4內，中齡針葉林、成熟針葉林、成熟闊葉林形成一個林齡梯隊，有利於森林生態系統的穩定與功能的發揮，十五年間緩沖區4受到的干擾相對較小.濕地數量在四個緩沖區內均有所減少，雖然在緩沖區4內森林生態系統恢復的較好，但濕地面積仍有所減少，說明保護及恢復濕地資源是一件非常艱巨的任務，必須引起高度重視.圖5表2參12First, resistance to geometrical distortion was obtained by using moment normalization ; second, we focus on the phase of fourier - mellin transform. before detecting watermark, synchronization could be retrieved by using the phase information. to eliminate the influence of pixel value distortion generated during print / scan process, a dft - based robust watermark algorithm was designed, which could successfully detect watermark from a severe distorted image
另一種思路是根據圖像經過旋轉、縮放、平移后，其傅立葉?梅林變換域只有相位受到影響的特點，從其相位中提取幾何失真信息，然後再進行相應的失真補償，從而消除幾何失真的影響；對于列印掃描過程產生的像素值失真，本文也提出了一種基於dft的魯棒性演算法，能在較嚴重的圖像失真情況下，成功檢測水印。Also, through the spectral analysis in digital image processing, methods of geometric correction and accuracy analysis, strengthening of information and extraction of the feature information of emerging of ratio and information ; the extraction of species and division into sub - compartment by using multi - supplementary information sources " ; and from the identification ability of a compartment, division into sub - compartments, land type and species and the ability of accuracy of geomatric correction and map - drawing ; they can be used as the comprehensive assessment of the ability of landscape planning and many other aspects, and determine the adaptiue faculty of different information sources in the forest management inventory
經過數字圖像的光譜分析、多種方法的幾何校正及精度分析、信息增強、比值及信息融合等多重技術進行特徵信息的提取，並應用dem 、林相圖和地形圖等多種輔助信息源，提取樹種、小班區劃等信息，提高了林班區劃、小班區劃、地類和樹種識別的能力與幾何校正精度、制圖能力，可用於風景區劃等方面進行綜合評價，確定不同信息源在森林資源二類清查中的適用性能力。That all computers can simulate each other is an immediate consequence of the theoretical work of alan turing and alonzo church
所有計算機能夠互相模擬，這是阿蘭?圖林和奧隆索?喬奇理論工作的直接結論。It is respectively : production, facility for transporting operates personnel : jockey of lathe work, milling, grinding work, boring labour, solderer, modular machine tool, machining center jockey, casting matchs benchwork, besmear to install ship - fitter of ship - fitter of equipment of benchwork of labour, tool, boiler, electric machinery, discretion to control ship - fitter of appearance of ship - fitter of appearance of instrument of electric equipment ship - fitter, electron, electrical engineering instrument, machine ; irrigation works of aricultural herd fishing produces personnel : inspector of quarantine of the member that animal epidemic disease prevents and cure, animal, firedamp produces work ; personnel of line of business of commerce, service : the member that assistant, bagman, publication is issued, chinese traditional medicine purchase and sale, clerk of the member that the division of division of appraisal appraisal division, chinese style noodle, chinese style noodle, western - style cook division, western - style noodle division, division that move wine, nutrition distributes food, dining - room, antechamber clerk, client clerk, health care ; handle affairs personnel and concerned personnel : secretary, public relations member, the member that terminal of communication of computer operator, cartographer, operator, user is maintained
分別是：生產、運輸設備操作人員：車工、銑工、磨工、鏜工、焊工、組合機床操作工、加工中心操作工、鑄配鉗工、塗裝工、工具鉗工、鍋爐設備裝配工、電機裝配工、高低壓電器裝配工、電子儀器儀表裝配工、電工儀器儀表裝配工、機修鉗工、汽車修理工、摩托車維修工、精密儀器儀表修理工、鍋爐設備安裝工、變電設備安裝工、維修電工、計算機維修工、手工木工、精細木工、音響調音員、貴金屬首飾手工製作工、土石方機械操作工、砌築工、混凝土工、鋼筋工、架子工、防水工、裝飾裝修工、電氣設備安裝工、管工、汽車駕駛員、起重裝卸機械操作工、化學檢驗工、食品檢驗工、紡織纖維檢驗工、貴金屬首飾鉆石檢驗員、防腐蝕工；農林牧漁水利生產人員：動物疫病防治員、動物檢疫檢驗員、沼氣生產工；商業、服務業人員：營業員、推銷員、出版物發行員、中藥購銷員、鑒定估價師、中式面點師、中式面點師、西式烹調師、西式面點師、調酒師、營養配菜員、餐廳服務員、前廳服務員、客戶服務員、保健按摩師、職業指導員、物業指導員、物業治理員、鍋爐操作工、美容師、美發師、攝影師、眼鏡驗光員、眼鏡定配工、家用電子產品維修工、家用電器產品維修工、照相器材維修工、鐘表維修工、辦公設備維修工、保育員、家政服務員、養老護理員；辦事人員和有關人員：秘書、公關員、計算機操作員、制圖員、話務員、用戶通信終端維修員。The front side of each medallion includes the images of one of the five mascots for the xxix olympiad, one of the five chinese famous ancient towers including the stork tower, yellow crane tower, tengwang pavilion, yueyang tower and penglai pavilion, as well as the name in both chinese and english, respectively
正面圖案分別為第29屆奧林匹克運動會5個吉祥物， 5座中國名樓鸛鵲樓、黃鶴樓、滕王閣、岳陽樓和蓬萊閣的景觀，以及相關的中英文文字。Ecological features, function indicators and social - human impact together constitute the fundermental system of regional ecosystem health assessment. haxi forestry center is located in tianzhu of gansu province. in view of the natural conditions, land use type and forest map, we classify the research area into 15 landscape types
甘肅天祝縣哈溪林區位於祁連山東段，依據哈溪林區的自然條件、土地類型和林相圖，將研究區劃分為苗圃，未成林地，宜林地，農田，牧草地，荒地，青海雲杉林，祁連圓柏，針葉混交林，楊類闊葉林，紅樺、榆、山楊硬闊林，針闊混交林、灌木林、疏林地和闊葉混交林等15種景觀類型。The latter part of the article expatiates the primarily techniques of the cross - platform automated forestry mapping. template technique : for the majority of the common forestry workers, it is impossible to have a certain degree of graphics knowledge and the forestry professional knowledge
模板技術：要製作一幅林業專題地圖，要求制圖者具備相當的專題制圖知識和林業專業知識，對于大部分普通林業工作者而言，這一要求難以滿足。The management efficency of forest resources was raised fron the independent management of graph and data to comprehensive management with gis as its tools. the sociaiized forestry and managerial decision participated with masses was accomplished from the local and closed management to networked and open management of forest resources
從對地形林相圖和二類調查數據的圖形、數據獨立管理到以gis為工具的綜合管理，提高了森林資源的管理效率；從對資源數據的本地管理、封閉管理到對資源數據的網路管理、開放管理，實現了林業的社會化和森林資源管理決策的公眾參與。The study indicates that digital photographic aerial photo, ikonos ( panchromatic and multi - spectral ), spots ( panchromatic and multi - spectral ) and the emerging map of spot4 ( panchromatic ) and etm can all be used in the forest management inventory, whereas etm ( including tm ) or the emerging map of etm and spot4 ( panchromatic ) can be used to investigate forest resources and draw maps in the mountain area of better forest aspect, when the first three remote - sensing sources can be used in the investigation of urban resources and the demand on detailed investigation is higher or the map - drawing of 10, 000 ratio scale
研究表明：數字航空像片、 ikonos （全色和多光譜） 、 spot5 （全色和多光譜） 、 spot4 （全色）與etm的融合圖都可以應用於森林資源二類清查，而前三種遙感信息源也適用於城市資源調查以及要求調查詳細程度更高或1 ： 1萬比例尺的制圖，在林相較好的山區，可應用etm （包括tm ）或etm與spot4 （全色）的融合圖進行森林資源調查與制圖。Based the guide of the sustainable development theory, taking the special target of fengning country, weichang country, guyuan country, zhangbei country, kangbao country, shangyi country made experimet fristly, through the typical survey and analysis and the assessment of the carrid effect, this dissertation tries to find the factors of policy and system restricting the recl amation of arable land for reforestation, to explore the emerging questions in the ecological construction of the poor region, to look for the effective ways of coordinative development of ecology and economy and to advance the corresponding means and the advice of policy and to offer the decisive basis and ways of further perfecting the corresponding policy system for the governments and the department of forestry
本論文以可持續發展理論為指導，以壩上豐寧、圍場、沽源、張北、康保、尚義六個首批試點縣為具體研究對象，通過典型調查分析和實施效果的評價，從中發現和找到制約退耕還林的制度和政策因素，探討欠發達地區退耕還林工程中所暴露出的問題，力圖尋求生態與經濟協調發展的有效途徑，並提出相應的對策和政策建議，為政府和林業部門進一步完善相應的政策體系提供決策依據和方法。On the loess plateau, water is the main limiting factors for vegetation growth. root distribution characters have special ecological meaning as it reflected the utilizations of trees to the environments. even - aged stands of robinia pseudoacacia on slope lands facing south and north were selected as sampling plots for root distribution investigation. investigatiing results showed that indicated that on all sites, root biomass decreased with depth, and the distribution depth of fine root was deeper than that of coarser root. the results of variance analysis indicated that there were great differences in root biomass among different diameter classes, and coarser root was the main sources of variance, and the root biomass, especially fine root ( < 3mm ) biomass on northern exposition sites was bigger than that on southern exposition sites. analysis of the vertical root distribution parameters, root extinction coefficient, indicated that the value of on northern exposition was more than 0. 982, while the value of on southern exposition was less than 0. 982, which indicated that the vertical root distribution depth of robinia pseudoacacia on southern exposition was deeper than that on southern exposition. and the distribution depth of fine roots ( < 1mm ) was deeper than that of thicker roots ( < 3mm ), which was in favor of the uptake of water and nutrients from deeper layers, helped the trees to adapt the arid environment, and promoted the growth of the upper parts of the tree
在中國西北黃土高原地區，水分是樹木生長發育的主要限制因子.根系分佈特徵由於反映了樹木對環境條件的利用程度而具有更加特殊的生態意義.本研究選擇陽坡和陰坡不同立地上年齡一致的刺槐林調查了根系分佈特徵.根系垂直分佈特徵的調查結果表明，在所有立地上，根系生物量隨著深度的增加而降低，其中細根的分佈深度大於粗根的分佈深度.方差分析結果表明:不同立地上不同徑級根系的分佈特徵也有明顯的差別，粗根是差異存在的主要原因，陰坡立地上的根系生物量，特別是細根生物量大於陽坡立地上的.對根系消弱系數的分析結果表明，陰坡立地上的根系消弱系數大於0 . 982 ，而陽坡立地上的根系消弱系數小於0 . 982 ，說明陰坡立地上刺槐根系的生物量在深層土壤中的分佈相對量更大一些.其中細根的根系消弱系數大於粗根的，這種根系分佈特徵有利於根系對深層土壤水分養分的吸收利用，進而促進樹木地上部分的生長發育.圖3表3參15Abstract : on the loess plateau, water is the main limiting factors for vegetation growth. root distribution characters have special ecological meaning as it reflected the utilizations of trees to the environments. even - aged stands of robinia pseudoacacia on slope lands facing south and north were selected as sampling plots for root distribution investigation. investigatiing results showed that indicated that on all sites, root biomass decreased with depth, and the distribution depth of fine root was deeper than that of coarser root. the results of variance analysis indicated that there were great differences in root biomass among different diameter classes, and coarser root was the main sources of variance, and the root biomass, especially fine root ( < 3mm ) biomass on northern exposition sites was bigger than that on southern exposition sites. analysis of the vertical root distribution parameters, root extinction coefficient, indicated that the value of on northern exposition was more than 0. 982, while the value of on southern exposition was less than 0. 982, which indicated that the vertical root distribution depth of robinia pseudoacacia on southern exposition was deeper than that on southern exposition. and the distribution depth of fine roots ( < 1mm ) was deeper than that of thicker roots ( < 3mm ), which was in favor of the uptake of water and nutrients from deeper layers, helped the trees to adapt the arid environment, and promoted the growth of the upper parts of the tree
文摘:在中國西北黃土高原地區，水分是樹木生長發育的主要限制因子.根系分佈特徵由於反映了樹木對環境條件的利用程度而具有更加特殊的生態意義.本研究選擇陽坡和陰坡不同立地上年齡一致的刺槐林調查了根系分佈特徵.根系垂直分佈特徵的調查結果表明，在所有立地上，根系生物量隨著深度的增加而降低，其中細根的分佈深度大於粗根的分佈深度.方差分析結果表明:不同立地上不同徑級根系的分佈特徵也有明顯的差別，粗根是差異存在的主要原因，陰坡立地上的根系生物量，特別是細根生物量大於陽坡立地上的.對根系消弱系數的分析結果表明，陰坡立地上的根系消弱系數大於0 . 982 ，而陽坡立地上的根系消弱系數小於0 . 982 ，說明陰坡立地上刺槐根系的生物量在深層土壤中的分佈相對量更大一些.其中細根的根系消弱系數大於粗根的，這種根系分佈特徵有利於根系對深層土壤水分養分的吸收利用，進而促進樹木地上部分的生長發育.圖3表3參15In this dissertation a typical area was selected as a case study, which is the tuqiang forest bureau, including two forestry farms, namely, yuying and fendou, covering more than 1. 2 10s ha, it is also one of the most severely burned bureaus during this fire. based on the widely investigation of the background information in the study area, and supported by the geographic information system ( gis ) and remote sensing ( rs ), the two digital forest stand maps ( 1987 and 2000 ) and dtm data were overlaid and the spatial and attribute database were produced. according to this, basic characteristics and changing of landscape structure and spatial pattern were widely and thoroughly analysed
論文選擇位於大興安嶺北坡圖強林業局的育英和奮斗兩個林場作為研究區（該區是1987年重過火區，總面積12萬多ha ） ，在對研究區基本情況廣泛調查的基礎上，藉助于rs 、 gis技術手段，並輔以景觀生態學知識的支持，研究了林火跡地森林景觀格局及其變化的主要特徵，同時運用分佈指數、偏相關分析等方法重點探討了地形因子對格局及變化的影響。Fantova first met einstein in 1929 in berlin. she arrived in the united states alone in 1939 and, at einstein ' s urging, attended library school at the university of north carolina
喬安娜?范多娃和愛因斯坦1929年在柏林相識。 1939年，她隻身來到美國，並在愛因斯坦的強烈要求下，進入北卡羅萊納大學的圖書館學院學習。分享友人