quercus 中文意思是什麼

quercus 解釋
麻櫟屬植物
  1. With the four forest community ' s age nearly the same, the order of different forest ground biomass of single tree was quercus liaotungensis > betulaplatyp hylla > popular davidiana > pinus tabulaeformis

    該研究揭示了森林群落自然演替的規律，對森林群落的經營管理和在黃土高原丘陵溝壑區進行林草植被建設和生態環境重建具有特殊意義。
  2. A new rot disease of quercus aliena var. acuteserrata in qinling

    秦嶺銳齒櫟一種新腐朽病害的發現
  3. ( 2 ) the dominance tree is evidence in the quercus aliena var

    群落密度與海拔高度之間關系不是很明顯。
  4. Response of soil respiration to soil temperature and moisture regimes in the natural forest of quercus aliena var. acuteserrata

    銳齒櫟林土壤呼吸對土壤水熱變化的響應
  5. Turnover process and energy change of fine roots of pinus tabulaeformis and quercus aliena var. acuteserrata natural forests in qinling mountains

    銳齒櫟林細根周轉過程與能態變化
  6. The paper studies the biodiversity characteristics, the relationship of the biodiversity and ecological process of quercus aliena var

    物種多樣性與群落密度之間呈「 m 」型關系。
  7. Acutesrata community. i get the conclusion through plenty of field survey and data analysis. ( 1 ). the pca analysis shows that the quercus aliena var

    （ 2 ）相關分析表明：海拔、坡向、發育階段、生物量等是影響研究區物種多樣性分佈格局的主要因子。
  8. The density with the biodiversity increasing shows " m " model. ( 3 ) the correlation analysis shows : elevation, slope, development stage and biomass are main factors which affect the biodiversity pattern in the research region. the biodiversity of the quercus aliena var. acutesrata community shows the patterns with the elevation and slope affecting : on sunny slope, the species diversity increases with the elevation increasing below the attitude of 1640m and its climax is at this attitude ( the diversity index h = 1. 68 ), upward this point, the diversity index descends slowly. the evenness shows ascend trend with the elevation upward, its climax point at 1800m ( the evenness index jsw = 0. 78 ), then descending after this point

    （ 5 ）通過分析，銳齒棟群落生物量與生物多樣性呈現如下關系:在海拔1500一170枷范圍內，銳齒棟群落生物量與物種多樣性之間呈單峰曲線關系;在海拔1700一1900m范圍內，生物量與物種多樣性之間呈不明顯的波動關系;在海拔1900一2100m范圍內，生物量隨物種多樣性的增加而增大，通過對不同高程內生物量與物種多樣性分析發現，隨著海拔的上升，最大生物量對應的物種多樣性略有增加趨勢;在相同海拔和坡向條件下，生物量與物種多樣性之間也呈典型的單峰曲線關系;群落凈生產力與物種多樣性之間總體上也呈單峰曲線關系。
  9. Botryosphaeria aesculi ) damaged horse - chestnut heavily and botryosphaeria canker caused the canker of quercus rubra, cercidiphyllum japonicum and many other plants

    同時研究了上海地區進口色葉喬木引種基地的主要有害生物及發生特點。
  10. This paper investigated the fungus flora of 8 main tree species, which are pinus tabulaeformis, larix principis - rupprechtii mayr, betula platyphylla suk, ostryopsis davidiana decne, ulmus pumila l., quercus liaotungensis koidz, populus davidiana dode, prunus ansu, in daqingshan mountain

    大青山地區環境惡劣、植被破壞嚴重，利用菌根生物技術實現植被恢復是一個重要方向。本文對大青山8個主要樹種，即：油松、落葉松、白樺、虎榛子、榆樹、遼東櫟、山杏菌根資源及生態進行了調查。
  11. The study shows that the early and late seed rains of constructive tree species in evergreen broadleaved forest at chongqing simian mountain had no activity. the bigger the seeds of the species and the earlier or later the seeds of the species matured, the higher the proportion of the seed rain damaged by animals. the quantitative variation of seed rain, active seed rain and seed bank did not take place at the same time. at early time, the number of seed banks of castanopsis fargesii, lithocarpus glabra, quercus myrsinrefolia, castanopsis plasyacantha, cinamomum subavenium. which own more active seed rain increased by geomitric series. the seed banks of castanopsis orthacantha and schima argentea were small, only survived a short time, and did not sprout next year. the quantitative dynamics of seed banks and their increasing or decreasing rates were decided by the proportion damaged by animals, dying speed of seeds and their resistance to pathogens and adverse circumstances, and the state of seed germination

    對重慶四面山常綠闊葉林建群種種子雨、種子庫的研究表明，建群種早期和晚期的種子雨無活力;種子偏早或偏晚成熟及大籽粒的樹種，其種子雨被取食的比例大;種子雨、有活力種子雨、種子庫三者的數量變化不一致;有活力種子雨量較大的栲、石櫟、小葉青岡、扁刺栲、香桂等，其種子庫密度在早期以近幾何級數的方式增長，元江栲、銀木荷種子庫小，存在時間短，翌年無一年生萌發苗;種子庫數量動態、消減率動態決定於種子被取食的強度、種子衰老的速度以及種子對病菌、逆境的抗性和種子萌發的整齊性
  12. Impacts of climatic change on quercus mongolica

    氣候變化對蒙古櫟生長和氣候生產力的影響
  13. The fractal dimension of the quercus liaotungensis, the grassland and the shrub landscape elements in wutai mountain is rather low, which shows that the quercus liaotungensis, the grassland and the shrub landscape are interfered quite little by human activities. summarily, we can conclude that the wutai mountain is a preferable site for ecological tour, but the rather big difference between the areas of each landscape element, the quite low diversity, the rather high degree of dominance as well as the influence of human activities are all the problems to be solved in the future management of the wutai mountain

    從五臺山各類景觀要素的分維研究中可以看出，各景觀要素的分維數普遍較低，說明各景觀要素的斑塊形狀較為簡單，受人為干擾較小；分維數較低的有遼東櫟林景觀、溫帶灌叢景觀、溫帶灌草叢及溫帶草原景觀和山地草甸景觀，這說明在該地區與其它植被景觀相比，遼東櫟林景觀、溫帶灌叢景觀、溫帶灌草叢及溫帶草原景觀和山地草甸景觀受人為活動的干擾較小，干擾程度低，天然狀態保持較好。
  14. The petiole and leaf lengths and leaf widths and cork thicknesses and seed widths of the quercus variabilis communities appeared to have a second - degree parabola relation with the latitudes of the communities ; the petiole lengths and leaf lengths and cork thickness appeared to have a clear second - degree parabola relation with the elevations of the communities ; the leaf and seed lengths appeared to have a clear positive correlativity with the elevations ; the seed lengths had a typical negative correlation with the elevations

    栓皮櫟種群的葉柄長、葉長、葉寬、栓皮厚度、種長和種寬隨緯度呈現出二次拋物線關系；葉柄長、葉長和栓皮厚度隨海拔高度呈現明顯的二次拋物線關系；葉寬和種寬隨海拔高度的變化呈現出明顯的正線性相關；種長與海拔的關系為一種典型的負線性相關。
  15. Histological observation of somatic embryogenesis from cultured embryos of quercus variabilis bi

    栓皮櫟體細胞胚胎發生的細胞組織學觀察
  16. Forestland evapotranspiration and water balance of pinus tabulaefor - mis and quercus variabilis mixed stand

    油松栓皮櫟混交林林地蒸散和水量平衡研究
  17. The study showed that the quercus variabilis communities in different habitats significantly differentiated in their trait parameters

    研究表明：不同生境的栓皮櫟種群性狀參數分化差異明顯。
  18. From april to october of 2001, a 31 - year - old pinus tabulaeformis and quercus variabilis mixed stand was studied on forestland evapotranspiration and water balance in western mountainous area of beijing

    摘要2001年4 - 10月，對北京西山地區一塊31年生的油松、栓皮櫟混交林的林地蒸散和水量平衡進行了研究。
  19. The water consumption of transpiration of pinus tabulaeformis and quercus variabilis mixed stand has marked seasonal difference, and the standard specific conductivity of quercus variabilis in the growing season is 2. 6 times as high as that of pinus tabulaeformis

    油松和栓皮櫟混交林的蒸騰耗水表現出明顯的季節差異，栓皮櫟的生長季標準比導率明顯高於油松，是油松的2 . 6倍。
  20. We choose the forest appearance tidiness, representative stands serving as standard plots, 40 stands were set up at qinling, hanzhong, huanghong in shaanxi respectively, measure every tree in the stands, measure the actual increase by the dominance tree, the time series model of individual age and diameter of quercus variabilis was established according to the actual diameter of quercus variabilis population by the fluctuant time series, the comparison of simulation and reality value of the every stand of quercus variabilis population diameter increase through the four models, the average simulation difference within 1. 5 %, the accuracy is 97. 8 % the simulation effect is better

    在陜西的秦嶺、漢中、黃龍地區選擇林相整齊、有代表性的地段作為標準地，設置樣方40個，對各樣方內的林木進行每木檢尺，通過優勢木解析的方法，測得栓皮櫟種群胸徑的實際生長量，運用起伏型時間序列分析，建立了栓皮櫟種群個體年齡與胸徑生長的時間序列模型，四個模型所得的各個樣地栓皮櫟胸徑生長的模擬值與實際值進行比較，其模擬平均誤差都在1 . 5 %以內，平均精度達到97 . 8 % ，模擬效果較好。
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