main natural population 中文意思是什麼

main natural population 解釋
主要自然群體
  • main : adj 1 主要的，主，全，總。2 充分的，盡量的；全力的，有力的。n 1 體力，氣力；力〈僅用於 with might...
  • natural : adj 1 自然界的；關于自然界的。2 天然的；未開墾的；野生的。3 固有的 生來的 天賦的（opp acquired）...
  • population : n. 1. 人口；人口總數；全體居民；人口的聚居。2. 物的全體[總數]；【生物學】蟲口；種群（量）；群體；族，組，個數；【統計學】對象總體，全域。3. 【物理學】布居；密度。4. 〈罕用語〉殖民。
  1. Seven plots selected from wanglang reserve were distributed in different types of forest and at different altitude, and different plot has different microclimate. soil property, microbial population, soil nutrient content of forest soil were determined in wanglang natural reserve, from may to october 2002 to july 2003, the ecological distribution of three main groups, bacteria, actinomycete and fungi were determined in the forest soils by the cell enumeration methods. six kinds of physiological groups, including ammoniation bacteria, nitrification bacteria, nitrosification bacteria, aerobic autogenesis azotobacter, aerobic cellulose - decomposing bacteria and anaerobic cellulose - decomposing bacteria were enumerated by the most - probable number ( mpn )

    2001年10月在王朗自然保護區內設立了3個定位研究樣地和4個臨時樣地，通過多次現場采樣與室內實驗分析，測定了白樺林、岷江冷杉林、紫果雲杉林、繡線菊-羊茅群落、羊茅群落及高山柳灌木叢等6種不同植物群落內土壤微生物三大類群數量、功能微生物數量、土壤養分，並在固定樣地內使用埋袋法進行了三個埋藏深度的凋落物分解袋試驗，初步研究了枝條、闊葉、針葉等凋落物組分在不同分解階段所含養分的動態變化。
  2. Based on the enviroment of the nandagang wetland, combining the outside investigation and inside analysis, adopting the mathematical analysis methods such as the principal component analysis ( pca ), regression analysis, correlation analysis etc. the type of wetland ecosystem, the flora of the wetland plant, the type, the function, the formation and succession and the outside influencial factors of the vegetation, the ecological conditions and biomass of the reed population are all studied. the main results can be concluded as follows : 1 ) the nandagang wetland is a freshwater one close to the bohai sea. its ecosystem can be divided into two parts : natural ecosystem and semi - artificial ecosystem

    本研究從南大港濕地的實際環境出發，採用樣方調查的方法，以外業調查和內業分析相結合、野外採集測量與實驗室分析處理相結合、定性描述與定量分析相結合為根本研究路線，應用主分量分析（ pca ） 、回歸分析、相關分析等數學分析手段，對南大港濕地生態系統的類型、濕地植物的區系組成、濕地植被類型、植被的功能、植被的形成和演替、植被的外界影響因素、濕地蘆葦種群的生態條件和種群生物量等方面進行了較深入的研究，主要研究結果如下： 1 ）南大港濕地是濱海瀉湖型淡水濕地。
  3. Contributions of the upgrade of industrial structure to economic growth is called profits of industrial structure, which come from the allocation efficiency of improvement of industrial elements between industries and within industry ( also including new industries that have high productivity ). as far as the upgrade of industrial structure in both home and abroad is concerned, besides the causes of the differences in natural resources endowments and population, institutions difference is the main reason for it

    產業結構升級對經濟增長的貢獻可以稱作產業結構收益，它來自於生產要素在產業間和產業內配置效率的提高（也包括產生高生產率的新產業） 。從國內外產業結構升級的情況看，除了自然資源稟賦差異、人口差異等因素外，制度差異是造成結構收益差異的主要原因。
  4. The analysis of the driving factors of land use change in the yellow river delta appears first in the paper. the two aspects of nature and socio - economy affecting land use are taken as the main driving forces. furthermore, natural aspect includes three parts of terrain feature, soil and hydrology and socio - economic factor is composed of population, economic development, urbanization, and policy that have influence on land use in dongying city

    首先分析了影響黃河三角洲土地利用的驅動因子，認為影響該區域土地利用的主要有自然因子和社會經濟因子，自然因子主要有地貌、土壤、水文三大要素，影響土地利用的社會因子主要有人口、經濟發展、城鎮化、政策等因素。
  5. Through factors analysis about population carrying capacity in state - owned forest region, many main influencing factors ( such as production and output capacity of forest resource, supply and demand situation of market, average income level of population in state - owned forest region, policy environment etc, ) are obtained. then this dissertation estimates that the level of population carrying capacity has the different changes in different phases and conditions, although its natural condition is established and fixed

    通過對影響林區人口承載能力的諸因素分析，得出林區人口承載能力主要受森林產出能力、市場需求狀況、林區人口的平均收入水平和政策環境等幾方面因素的影響；林區人口承載能力在具體條件下是一定的，但由於其決定因素的可變性，它又是可變的。
  6. The results showed that the main factor affection the population scale in villages and township in taichung county before 1975 was natural population growth and that after 1975 was population movement

    根據本文研究指出，臺中縣各鄉鎮人口發展趨勢，在1975年以前人口自然增長仍是影響各鄉鎮人口規模的主要因素； 1975年以後人口社會變動才逐漸取代人口自然增長，成為影響鄉鎮人口規模的主要因素。
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