退化區 的英文怎麼說
中文拼音 [tuìhuàqū]
退化區
英文
zone of degeneration-
They are jinfo mountain in nanchuan county ( natural protection section ), wuling mountain in qianjiang county ( national emphases forest demonstration county which forest cover rate is beyond 50 % ) and zhongliang mountain in beibei county ( artificial destruction is very grave ). some main land use patterns i. e. woodland, garden, infield, abandon infield, shrub and grassplot are selected in those three sample sites. four aspects on soil fertility index of karst environment under different land use patterns in these three sample sites, are revealed in this paper, by using the field test, indoor measure and analysis, outdoor experiment and field investigation, and the knowledge and technique of soil, ecology, physics and chemistry etc. they are physical characteristic ( effective soil thickness, organic layer thickness, soil texture, water - stable aggregate and soil water etc. ), chemical fertility ( organism, omni - n, omni - p, omni - k, alkali - nitrogen, available p, available k and rapid available k etc. ), soil animalcule ( bacteria, fungi, actinomyces and their grosses ) and soil - seed - pool ( plant community diversity index ) in karst ecosystem
本研究以重慶市的南川金佛山（自然保護區） 、黔江武陵山（國家重點退耕還林示範縣，森林覆蓋率50以上）和北碚中梁山（遭人為破壞嚴重）典型巖溶區為對象，選擇了幾種重要的利用方式，包括林地、果園、耕地、棄耕地和灌草坡，採用野外巖溶生態調查和室內試驗測量分析相結合的方法，以不同土地利用方式巖溶土壤肥力為重點，對不同土地利用方式土壤肥力特徵進行量化分析，找出巖溶土壤肥力差異的主要方面及其根本原因，論文主要從土壤剖面物理退化指標（有效土層厚度、有機質層厚度、質地、團聚體、水分含量等） ，化學肥力退化指標（有機質、全n 、全p 、全k 、堿解n 、速效p和速效k等） ，樣地土壤微生物指標（細菌、真菌、放線菌數量及總量）以及樣地土壤種子庫植物群落多樣性等4個方面對重慶典型巖溶區的土壤肥力特徵進行了較為詳細的分析研究，為巖溶地區士壤資源的合理利用及結構的調控管理提供依據。Based on the science of human settlements, the theory of urban growth, the theory of urban - rural integration and the theory of sustainable development, this paper proceeded with the prominent contradiction between urban growth and cave - dwellings " degeneration. after analyzing general situation and regional feature of qingyang, the actualities of cave dwellings were evaluated in the first place which including cave dwellings " history, basic style, regional feature, green principle, culture connotation, as well as traditional cave dwellings " shortage and developing dilemma
本研究從城鎮增長和窯居退化這一突出矛盾入手，依據人居環境理論、城鎮增長理論、城鄉一體化理論、可持續發展理論，在分析慶陽概況與區域特徵的基礎上，首先對慶陽窯洞民居的發展現狀進行了評價，包括窯洞民居的歷史沿革、基本類型、地域特色、綠色理念、聚落景觀、文化內涵以及傳統窯居的局限性和目前發展的困境。Soil is the base of agriculture production, the key measure to prevent water and soil loss is to conserve soil, but most soil nutrient is lost with the sediment loss, and serious water and soil loss make the soil thickness degrease, the soil nutrient be deficient and lean, the land quality degrade and the yield of plant decrease, all this results is going to threaten the people ' s transplanting and the agriculture sustainable development, and restrict the economy development of three gorges regions
同時，土壤是農業生產的根本，治理水土流失的關鍵是要保住土壤，而土壤養分絕大部分是隨著泥沙流失的，嚴重的水土流失造成土層淺簿、養分貧瘠，土地質量退化，產量下降，對三峽庫區移民工作和農業可持續發展造成嚴重威脅，制約三峽庫區經濟發展。因此進行三峽庫區坡耕地土壤侵蝕機理研究，探索減輕坡耕地土壤流失的方法措施，具有全局性的重大意義。The program will have to eradicate the agricultural misery in the north amazon region and northeast arid region, expect that the culture of short cycle is substituted by permanent cultures and try to construct a energy forest with native oil been plants in the amazon region where about 200 million hectares of deforested lands are degrading
他介紹了巴西的生物柴油計劃，包括扭轉巴西北部亞馬遜地區和東北部乾旱地區落後的農業，以可持續的生產方式替代短期的生產方式，並提到巴西亞馬遜地區有約2億公頃被砍伐后正在退化，有可能在這些土地上種植當地的產油作物，形成一個產能可以供應整個歐盟生物燃油需求的能源作物林。In typical watershed, quxi watershed, the result of external forcing, submerge and migrant, is the resource change of slope cultivated lands, economical forest, vegetation, water, habitant etc. of the ecosystem, and the changes of demand for food supplies, energy resource and education
移民區典型小流域? ?曲溪小流域，受淹沒、移民2個驅動力的作用，耕地、經濟林、植被、水、棲息地等資源發生了顯著變化，系統的糧食、能源、教育需求也隨之而變，在內在反饋機制的作用下，導致系統輸出為水土流失加劇、生物多樣性受到破壞、土地退化嚴重等。Along with development of mining in this region, abnormity of heavy - metal endogenetic geochemistry change to heavy - metal inchoative geochemistry, which lead to accumulation and diffusion of heavy metal in mine region of red soil and great red soil area, serious degradation of soil caused by heavy metal pollution, and mine ecological system destroy
隨著有色金屬采礦業的發展，重金屬的內生地球化學異常轉化向表生地球化學異常。由此，使紅壤礦區土壤乃至大面積紅壤中重金屬積累擴散，造成土壤重金屬污染退化加劇，生態系統遭受嚴重破壞。The area of deterioration, while essentially one of decay, of stationary or declining population, is also one of regeneration.
退化地區基本上是腐朽、沒落、人口漸趨減少的地區，但它同時又是一個新生的地區。The classified result show that the grass land of this region retrogressed badly in 2000 : the appreciable retrogression proportion of the grass land is 15 %, the moderate retrogression proportion is 15 % ; the serious retrogression proportion is 8 % ; the area of desert is 2755. 27km2 and the proportion is 19 %, which had increased about 88. 9 % in eight years
植被覆蓋度分類結果顯示， 2000年該地區草地退化比較嚴重： 21草地輕度退化， 15的草地中度退化， 8的草地重度退化，土地沙化面積為2755 . 27km ~ 2 ，比1992年增加了88 . 9 。Based on the principles of restoration ecology and main aim of karst vegetation restoration at present, take huajiang canyon with a typical degraded vegetation area located in southwest guizhou as an example, we study bio - ecological features of the volunteer plants with some economic values and the soil environment, for the purpose of making some models of the pioneer plants to popularize
根據恢復生態學原理和喀斯特區植被恢復的目標，以位於貴州省西南部的典型喀斯特植被退化區花江峽谷為例，通過研究該區具一定經濟價值和推廣價值的先鋒植物的生物生態學特徵和土壤環境，研究適于推廣應用的先鋒植物群落模式。The first geologic reason for degeneration of the eco - environment in the headwater area of the yellow river is that the increase of the recent geologic function caused desertification and grasslands resource decreased and underside changed, destroied the balance of water - air - heat in the area ; the second is that the water environment changes by the degradation and atrophy of frozen earth cause multilayer and synthesis cause of formation degeneration of the eco - environment ; the third is that the man and rats function accelerated degeneration of the eco - environment in the headwater area of the yellow river
摘要黃河源區生態環境惡化的地質原因之一是現代地質作用增強，形成以荒漠化為主的草地資源退化與下墊面改變，地區水氣熱平衡破壞；二是因凍土退化、萎縮，引起水環境變異，導致多層面與綜合成因的生態環境惡化；三是人為及鼠類活動對源區生態環境惡化起著推波助瀾的作用。The research of soil degradation in pur country is mainly concentrated on the red earth hilly area in the south in the past, and is less on the loess plateau that is one of the most fragile areas. based on field experiment and laboratory analysis, discuses the degradation mechanism, and raises the methods of refreshing and reestablishing land productivity of huangshan soil in chunhua county of shaanxi. in the hope of serving development of western regions and ecological environment construction that concede the land to forestry ( the grass )
我國以前對土壤退化問題的研究主要集中於南方紅壤丘陵區，對生態環境最脆弱的黃土高原地區的土壤退化研究相對較少，故本文以黃土高原地區陜西淳化縣的侵蝕性黃?土為對象，通過野外人工模擬降雨試驗和室內分析相結合的方法，探討了侵蝕性黃?土的退化機理，提出了恢復和重建黃?土土地生產力的途徑和方法，以期服務于西部大開發和退耕還林（草）的生態環境建設。Desertization, land degradation in arid, semi - arid and dry sub - humid area, is one of the environmental problems concerned by human society. it has a direct relationship with the existence and development of mankind
沙漠化即發生在乾旱、半乾旱及半濕潤乾旱地區的土地退化，是人類社會普遍關注的環境問題之一，與人類自身的生存和發展有著直接的關系。In the area of watershed between the yangtze river and the huaihe river, there are a series of ecological environmental issues, such as fragile forest ecosystem, frequent drought damage, lake of water resources, serious soil and water loss and contamination by chemical fertilizer, pesticide and plastic membrane
摘要分析了江淮分水嶺地區存在的森林生態系統脆弱，易旱多災，水資源短缺，土壤貧瘠，礦山開采過度，水土流水嚴重，化肥、農藥、農膜等農業化學品污染嚴重，農村生態環境退化等生態環境問題。The degradation of the electrical characteristics in sic pn junctions irradiated by neutron is attributed to the recombination centers and the electric field effect on the thermal emission of traps within the depletion region. the relationship of the ideality factor to the applied voltage is theoretically studied
提出了中子輻照下sicpn結電特性退化的新的理論， pn結耗盡區中的輻照陷階在耗盡區電場的作用下熱發射效應得到加強，從而導致pn結正偏和反偏時的復合電流和產生電流的改變。The research results mainly show : ( 1 ) the ecological degradation characteristics of wuxi county include : some soil is thin and barren and its water and fertility conservation abilities are poor, gradual degradation of soil results in decrease of vegetation diversity and the vegetation community structure gradually inclines tc simplicity from complexity. the types of soil and water loss in wuxi county mainly involve surface erosion and gully erosion. according to investigation, surface erosion area occupies 80 % or so or erosion area, in which the slope farmlands surface erosion area accounts for about 70 % of farmland erosion area
研究結果主要包括： （ 1 ）巫溪縣生態退化特徵表現：作為生物生長基質的部分土壤薄而貧瘠，保水保肥能力差，部分地區基巖裸露，土壤的不斷退化導致植物種多樣性減少，植物種群結構逐步由復雜趨向簡單化；縣內水土流失的類型主要包括面蝕和溝蝕兩大類，據調查，面蝕面積占侵蝕總面積的80左右，其中坡耕地面蝕佔耕地侵蝕面積的70左右。In light of current using situation and drawing on the experience of many scholars researched methods and viewpoints, this thesis made com land, fallow land, orchard, grass land as experimental field in black soil region jlau, which carried out experiment by applying different amounts of n and p fertilization in corn field. by means of collecting the samples of rainfall runoff, erosion silt and surface layer soil before and after rainfall for one year nature precipitation in field, we study the effect of surface runoff on n and p nutrient and fertility degeneration. the results showed : ( l ) there are lots of factors which affect soil erosion and losses of n and p, in which rainfall and rainfall intensity were more important, while rainfall intensity is the most important meteorological phenomena factor
針對當前黑土利用現狀，本文借鑒眾多學者的研究方法和觀點，在吉林農大黑土區選擇利用方式不同的玉米地、休閑地、果園、草地，在玉米區進行了不同數量的施肥，通過野外試驗，採集一年自然降雨產流及泥沙樣品，同時採集降雨前後的耕層土壤樣品，研究了黑土區地表徑流對氮磷養分特徵及肥力退化的影響，結果表明：土壤侵蝕和氮磷的流失受諸多因素的影響，降雨量、降雨強度是重要因子，而降雨強度是影響農田地表徑流養分流失的最重要的氣象因子，特別是暴雨，暴雨徑流中氮磷濃度較平時高得多；隨作物生長，覆蓋度逐漸增加以及不同利用方式下表現的覆蓋度差異，氮磷流失都表現為顯著的差異。Based on measurement of strains of both horizontal stirrups in the joint core and longitudinal reinforcement passing througth the joint, in different stages, transfer mechanism and factors affacting seismic behavior of the joint, were analysed. under different shear compression ration, effect of axial force ratio on seismic behawior of the joint was also evaluated, static shear and seismic shear of the joint based on capacity design were investigated. on this basis, new governing criteria and conditions of seismic behavior of the joint were put forward
通過對節點區水平箍筋以及貫穿節點梁、柱縱筋在不同受力階段應變的精細量測，對節點的傳力機理以及影響抗震性能的因素進行了分析研究；對不同剪壓比條件下軸壓比對節點抗震性能的影響規律進行了分析研究；對不同受力階段梁筋的粘結退化規律以及節點區的剪切變形進行了分析研究；對節點的靜力抗剪與建立在能力設計思路上的抗震抗剪問題進行了深入研究，提出了建立在新思路基礎上的節點抗震性能控制準則和控制條件。At present, because of the increasing of population and livestock in pasture areas, the grassland area appeared serious degeneration and desertification. many grassland areas have not entered a self - sustaining, non - sustainable development phase that is to say the environment is non - sustainable and so does the ecology system and social economics
目前，由於草原牧區人口與牲畜的增多，導致草原退化、沙化嚴重，許多地區的草原已進入一個不能自我維持、不可持續發展的階段? ?環境的不可持續性、生態系統的不可持續性以及社會經濟的不可持續性。On may 3, invited by the institutes deputy directors liu xiaobing and hu naizhe, dr. mclaughlin visited the experimental park in harbin and the black soil ecological experiment station in hailun. with deputy director liu xiaobing and the research fellow zhang xingyi, he had an in - depth discussion of some issues of common interest to both sides, like the deterioration and management of black soil, conservation farming, compacting of soil
5月3日， neil博士應劉曉冰副所長和胡乃哲副所長的邀請，訪問了我所哈爾濱園區以及海倫黑土生態實驗站，與劉副所長張興義研究員等圍繞黑土退化與管理保護性耕作土壤壓實等雙方感興趣的問題進行了深入的交流。Five vegetation communities : herbosa, shrubs, coniferous forest, theropencedrymion, and evergreen broad - leaved forest in the red soil region of the lijiang valley are selected as the five successive stages of the typical restoration process of degraded ecosystems to study variation of structure and biomass of the vegetation of the five different stages
摘要利用時空替代原理，選取灕江流域紅壤區退化生態系統恢復過程中具有代表性的草叢、灌叢、針葉林、針闊混交林、常綠闊葉林5個階段作為演替序列，研究自然恢復過程中各演替階段的植被結構動態和生物量變化。分享友人