細粒土壤 的英文怎麼說
中文拼音 [xìlìtǔrǎng]
細粒土壤
英文
fine soil-
Capillarity ( capillary action ) the rise or fall of liquids in narrow tubes as a result of the surface tension of the liquid, which causes the water to adhere to solid surfaces, such as soil particles or the walls of xylem vessels
毛細現象(毛細管作用) :由液體表面張力引起的液體在細管中上升或下降的現象,毛細現象引起水和固體表面的粘合作用,例如土壤顆粒或木質部導管壁。Standard test method for laboratory miniature vane shear test for saturatedfine - grained clayey soil
飽和細粒粘性土壤的實驗室小型十字板剪切試驗的標準試驗方法Setenaly according to the analyses from selected profiles, we know that, it is cold and dry in this region during the early holocene when east asian winter monsoon ' s influence is obvious, so, it is a transition period from sand deposit to sandy soil deposit, when the layers become thinner gradually from north to south. during middle holocene, it is warm and humid, influenced evidently by east asian summer monsoon, so, it is an obivious pedogenesis, when there are generally well - developped holecene palaeosol ( so ) from north to south, and the pedogenesis in the south is better than that in the north, the soil is also thicker than that of the north. from late holocene to now, the climate changes to be dry and cold, but its changing scope is smaller than that of last glacial period
2 、就所選剖面分析來看,本區在全新世早期氣候回返,相對較寒冷乾燥,東亞冬季風影響較明顯,此時為沙層堆積向砂質土壤過渡,自北至南堆積的沙粒漸細;全新世中期氣候溫暖濕潤,東亞夏季風影響顯著,此時為明顯的成壤期,表現在自北至南普遍可見發育較好的黑壚土層,且南部的成壤作用比北部好,土壤的厚度也要大;全新世晚期至今,氣候向乾冷方向轉化,但變化幅度遠小於末次冰期。Grain - size accumulation percentage of the aeolian sands in the past 150 ka in milanggouwan section is mainly characterized by the aeolian palaeo - mobile dune sands, which are composed of majority fine sands and minority very fine sands. there is n ' t almost any silt and clay. those of the fluvial facies, especially the lacustrine facies and palaeosols, are mainly composed of very fine sands and also contain some quantities of silt and clay
米浪溝灣剖面150kabp以來風成砂的粒度累積百分含量以古流動砂丘砂物質為主,其中以細砂含量最高,極細砂為次,幾乎不含粉砂與粘土;河流相、特別是湖沼相與古土壤以極細砂含量占優勢,且具一定含量的粉砂和粘土。The research showed that pam could improve soil structure, and greatly increase the stabilization of soil aggregates, so soil crust development would be decreased. fifthly, soil grain that controls rainfall splash erosion was obtained, the influence of soil clay was very great during initial stages of rainfall. with rainfall going on, soil coarse sand and fine sand would control the splash erosion
五、控制土壤濺蝕的主要土壤粒級:在降雨初期土壤的的粘粒對濺蝕速率的影響較大,隨著降雨歷時的延長,土壤中的細砂和粗砂成為濺蝕速率影響較大的因子;六、對土壤濺蝕影響較大的土壤結構特徵因子:降雨5分鐘時,土壤的滲透系數對濺蝕速率的影響較大,隨著降雨的繼續進行,土壤的團聚度一直對土壤濺蝕速率影響較大。The general characteristics of the grain - size distribution of different sedimentary facies, es pecially the variations of the parameters mz ( mean particle diameter ) and o ( standard deviation ) clearly show that the fluvio - lacustrine facies and palaeosols usually become finer in particles and worse in sorting than the aeolian sands
該剖面不同沉積相粒度的一般分佈特徵尤其是粒度參數? mz 、的變化明顯表現出,河湖相或古土壤通常要較風成砂顆粒細化,分選相對較差。Test method for fine fraction content of soils
土壤細粒度級含量的試驗方法Geotechnical investigation and testing - laboratory testing of soil - part 2 : determination of density of fine grained soil iso ts 17892 - 2 : 2004 ; german version cen iso ts 17892 - 2 : 2004
土工調查和試驗.土壤的實驗室試驗.第2部分:細粒狀土It can be observed that the sediments of the holocene loess is continuous and thus it reflects the environmental change and human activities since the holocene. meanwhile, laoguantai profile is a perfect one because it lies in the periphery of the laoguantai cultural relics. on the basis of outdoor observation and indoor experimental analysis, the author selects proxy substitute indexes, such as grain - size, magnetic susceptibility, microelements, cacos and ph value, etc. moreover, the thesis also calculates and investigates the remains of human activities kept in the profile
為了盡可能準確地獲取該地區全新世以來的環境演變和人地關系演進的真實環境背景,本次研究在野外詳細觀測和大量室內實驗分析的基礎上,審慎地選取了多項用於再現古氣候環境的代用指標進行了分析,這些指標包括粒度、磁化率、微量化學元素(包括fe 、 rb 、 co 、 li 、 cr ; sr 、 ba 、 cd 、 sb ; bi 、 mn ; cu 、 zn 、 pb 、 ni ) 、碳酸鈣和土壤ph值等。The data collected in this study indicates that the paleosol layer is thicker in the southeast region than in the northwest and thicker in the north region than in the south
通過各項指標區域橫向對比發現,砂質古土壤層具有從西北向東南漸變厚變深的規律和粒度值從西北向東南由粗變細的規律。Standard test method for capillary - moisture relationships for coarse - and medium - textured soils by porous - plate apparatus
用多孔板儀器測量粗粒和中等結構土壤的毛細管與水份關系的標準試驗方法Vegetation restoration also resulted in the changes of soil physical and chemical properties, i. e., the contents of organic matter, alkali - hydro nitrogen, rapidly - available potassium and the contents of fine sand, very fine sand and clay were increased significantly, while ph and the content of rapidly - available phosphorus were decreased
植被的恢復使土壤理化性質發生了變化,與恢復前相比土壤中有機質、堿解氮、速效鉀以及細砂、極細砂、粉砂、粘粒含量顯著增加, ph值和速效磷含量降低。To create transgenic mushrooms, researchers attached a gene that confers resistance to hygromycin, an antibiotic, to circular pieces of bacterial dna called plasmids, which hae the ability to multiply within a bacterium known as agrobacterium
為了創造轉基因蘑菇,研究人員需要把一種抵抗潮黴素(一種抗生素)的基因片段插入細菌dna的圓形片段(也叫質粒)中去,它將隨著土壤桿菌復制而大量復制。Smart dust is the name researchers have given to the idea of having handfuls of tiny, cheap sensors called motes that can be scattered around to measure all manner of things in the environment, from chemicals in the soil to scents in the air
智能灰塵是研究員對細微、廉價的傳感器微粒的稱呼,它們可以分散於周圍環境測量各種形態的的物體,從土壤的化學成分到空氣的氣味。Presently, the scientist have made out some successes by using biotechnology and molecuology, for example, planting out regeneration shoots, culture suspended cell in ferment tank, screening mutant tissue with high content of flavonoids, cloning and sup - expression of key enzyme, restraining derivative pathway by anti - dna or anti - rna and inducing genetic transformated hairy root
通過培養水母雪蓮的發狀根將是獲得雪蓮類黃酮極有前途的方法,目前還是一項待填補的空白。發根農桿菌( agrobacteriumrhizogenes )是一種革蘭氏陰性土壤細菌,細胞內有200kb左右的雙鏈閉環dna ? ri質粒( rootinducingplasmid ) 。Geotechnical investigation and testing - laboratory testing of soil - part 7 : unconfined compression test on fine - grained soil iso ts 17892 - 7 : 2004 ; german version cen iso ts 17892 - 7 : 2004
土工調查和試驗.土壤的實驗室試驗.第7部分:細粒土的It has shown an evident phenomenon, called " island of fertility " in the shrubs because there were high content of medium - fine soil particles ( 0. 25 ~ 0. 02mm ) and relatively abundant soil moisture, organic matter, total n, available k and hydrolytic n on the soil surface under the shrubs, and furthermore, the content of soil moisture and nutrients gradually decreased from the center of the shrubs to its edge in this soil layer
灌叢地表層( 0 5cm )土壤的中細粒子( 0 . 25 0 . 02mm )含量高,並且土壤水分、有機質、全氮、速效鉀和堿解氮含量相對優越, 「沃島」現象明顯,而且,由灌叢內向外,含量逐漸降低。灌叢地下層( 20cm以下)土壤含水量從灌叢中心向邊緣逐漸增加。It puts forward to differentiate the coarse and fine sand and then measure the sediment yield of total precipitation erosion by using the combined method of drying and pycnometer in the light of the soil mixed with large quantity of coarser sand in the model tests
針對模型土壤中夾雜著大量粒徑較粗的泥沙顆粒的試驗,提出進行泥沙粗細分層,然後採用烘乾法和密度瓶法相結合的方法來測量次降雨侵蝕產沙量。分享友人