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。
By means of detailed analysis to vernacularism architecture of southwest multinational area, we pursue the more effective way to seek regional culture passing on, and maintain the people ' s spiritual adscription
通過對西
南多民族地區鄉土主義建築創作的深入剖析,以探尋實現地
方文化傳統延續、維系人民心靈歸屬的有效設計
方法和道路。
The anatomical structure of the aerial adventitious roots of taxus chinensis var. mairei. was investigated in this paper
摘要對自然狀態下
南方紅豆杉莖干向下萌生的氣生不定根進行解剖學觀察。
Police will implement special traffic arrangements to facilitate the staging of the french aerobatic display on wednesday ( october 20 ) on the south side of the hong kong island
為配合星期三(十月二十日)下午于港島
南區上空舉行的法國空軍花式飛行表演,警
方將在當日實施特別交通措施。
Language : there are 11 official languages, including english, afrikaans and xhosa, zulu, sesotho and other nine african languages
語言: 11種官
方語言。其中包括英語、
南非荷蘭語和克索薩語、祖盧語、塞蘇托語等9種當地主要部族語言。
Rsg targets the modern, progressive afrikaans - speaking community and offers news, current affairs, sport, lifestyle, education and music, alles in een - sonder grense
使用
南非語廣播的.播放有關
南非社區和新聞,時事,體育,生活
方式,教育和音樂臺。
Fist of all, on the basis of the research of agone boffins, this author investigates the interaction mechanism of bolts and rock, and introduces the elastic ? lastic analytical resolution which is consist of the liner structure, the equivalent reinforced wall rock and the original wall rock in the simple loading from the equivalent well - proportioned view ; this solution is very important meaning for the engineering design. on the basis of coulomb friction model, the author introduces the finite element equation of the contact problem in order to provide the academic foundation for the application of msc. marc. finally, combining the engineering practice of the non - linear analysis of shield tunnel through yellow river of the south - north water transfer and using the model of friction, the author researched the evolution law of stress and displacement field in the structure of grouted rock bolts, and analyzed the effect to the stress and deformation of surrounding rock mass due to anchor supports
首先,在前人研究成果的基礎上,對錨桿與圍巖的相互作用機理進行研究,利用全長錨固錨桿的中性點理論,從等效均化的角度來考慮錨桿對圍巖的加固作用,並推導了在簡單荷載作用下,含有襯砌、等效加固后的圍巖、原始圍巖三者的彈塑性解析解,對工程設計有著重要的參考意義;在數值模擬
方面,以考慮錨固圍巖滿足規則化庫侖摩擦模型為基礎,利用虛功原理推導了接觸問題的有限元
方程的計算格式,為開發運用大型商用有限元軟體msc . marc提供了理論根據,也形成了本文的理論基礎:最後,論文以
南水北調東線穿黃隧洞穩定性分析項目為工程實例,利用本文所述的接觸問題的摩擦模型理論,對錨桿支護結構的應力場、位移場的變化規律進行了研究,分析了加錨支護對隧洞圍巖應力、變形的影響。
Such complexes might have affinity for detrimental inorganic oxyanions such as arsenate, a common toxic contaminant in soils. the purpose of this study is to investigate the influence of environmental conditions on the adsorption of arsenate on fe - oxyhydroxide - monlmorillonte complexes, which is significant to agrology, geochemistry and environmental science
本研究即以
南方的土壤環境條件為參考,模擬在ph = 5時的酸性氧化條件下,土壤中低聚合羥基鐵?蒙脫石復合體的形成、物化性特徵及其吸附砷酸根陰離子的行為。
It was the best position from which to cover, from the south, any raid or attack against the important airfield at fhelepte.
它是掩蔽任何
南來的攻擊或空襲西列浦特重要機場的最好地
方。
The country accounts for 12 percent of the global catch of 2 million tons and gobbles up about a quarter of the world ' s supply of the five big species : bluefin, southern bluefin, bigeye, yellowfin and albacore
在全球兩百萬噸漁獲量中,該國佔了百分之十二;在黑鮪、
南方黑鮪、大目鮪、黃鰭鮪及長鰭鮪等全球所捕獲五種最主要鮪魚中,也有四分之一進了日本人的口中。
Language : frenchis the official language, arabic dialects predominate among the northernmuslims. the animist groups in the south speak a variety of languages, the mostcommon of which issara
語言:法語為官
方語言,北
方居民通用查德化的阿拉伯語,
南方居民通用蘇丹語系的薩拉語等語言。
The study investigated aboveground growths of caragana korshinskii and artemisia ordosica planted in four modes, revealing that in different planting modes their densities, heights and canopy width and biomasses remained unchanged or tended to decrease slightly ; the young shoots of a. ordosica annually grew in a s - shaped cure and the young shoots of c. korshinskii grew fast in spring and grew slowly or cease to grow from july on ; the biomasses and leaf area indexes of c. korshinskii and a. ordosica annually varied in a double peak curve and there were 8 annual plants that invaded in the four planting modes and formed higher coverage ; the quadrat with only a. ordoska appeared to have obviously lower coverage and biomass that the other three quadrats
摘要對騰格里沙漠東
南緣2種人工植被檸條和油篙在4種配置
方式下地上部分的生長動態進行了研究,結果表明:不同配置
方式下它們的密度、高度、冠幅和生物量基本不變或略微呈下降趨勢;油篙新梢的年生長動態呈s型曲線,檸條新梢春季生長速度較快, 7月份以後生長速度緩慢或基本停止生長;檸條、油篙地上生物量和葉面積指數的年變化均表現為雙峰型, 4種配置
方式下共有8種1年生植物人侵,並具有較高的植被蓋度;同其它3個樣地相比,純油篙樣地1年生植物的密度、蓋度和生物量明顯偏低。
During the reign of emperor qianlong ( 1736 - 1795 ), the ancestors of the law family emigrated from the north of china to chai wan and built this typical hakka village house. today it is the only example of its kind in the district
羅氏族人的先祖在乾隆年間( 1736 - 1795年) ,由中國北
方南遷至柴灣定居,興建了這間典型的客家村屋,現在是區內碩果僅存的完整客家民居。
With a history of over 200 years, the house is a typical middle - sized chinese hakka village house. during the reign of emperor qianlong ( 1736 - 1795 a. d. ), the ancestors of the house s owner, surnamed law, emigrated from the north of china to chai wan
羅屋是柴灣區內唯一保存完整的原有村屋,建成至今已超過二百年,是典型的中型客家村屋。屋主羅氏的祖先在清乾隆(公元1736 - 1795年)年間,由中國北方南遷至柴灣定居。