The results showed that the mean proportion of polymorphic loci ( ppb ) of anabasis aphylla, which comprised 3 subpopulations ( 58 individuals sampled ), generated by 16 primers was 94. 56 %, the value of ppb of ceratocarpus arenarius, which had 4 subpopulations ( 80 individuals sampled ), using 16 primers was 98. 00 %. the paper had proved that the higher genetic diversity and the genetic differentiation existed in the populations of boih anabasis aphylla and ceratocarpus arenarius, while the latter had much more genetic diversity than the former. moreover, the study discussed the shannon information index and nei ' s gene diversity index of the two species natural populations, which indicated that there were more genetic variations within the subpopu
另外,通過rapd資料的聚類分析及
相關性分析研究,發現無
葉假木賊和角果藜自然種群的遺傳結構與綠洲沙漠過渡帶的微生境生態因子(主要是土壤因子)
相關,其中無
葉假木賊亞種群遺傳多樣性水平不僅與土壤含水量( w ) 、鉀鈉離子濃度( k + na )和氯離子濃度( cl )呈顯著的正
相關( p 0 . 05 ) ,還與土壤中有機質( som ) 、全氮( nt )和全磷( pt )含量呈顯著的負
相關;同時,角果藜種群的遺傳多樣性水平與土壤中有機質( som )和全氮( nt )含量呈顯著的正
相關,而與co _ 3 ~ ( 2 - )濃度呈顯著的負
相關;除此之外,其它土壤生態因子與兩物種遺傳多樣性水平的
相關性均不顯著(卜0 . 05 ) 。
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。
Elevated [ co2 ] treatment resulted in the larger accumulation of carbohydrate ( soluble sugar and starch ) in leaves of anthurium andraeanum lind during short - term experiment, but the difference of three treatment groups is no striking during long - term experiment. chlorophyll content, chlorophyll a / chlorophyll b ratio in leaves increased, while soluble protein decreased in elevated [ co2 ] during experiments. elevated [ co2 ] led to the increase of rubp carboxylase activity and the decline of glycolic acid oxidase activity during short - term experiment, but the rubp carboxylase activity decreased after 60 d, the glycolic acid oxidase activity increased after 90 d
高濃度co _ 2處理的紅掌,
葉片中的
葉綠素含量增加,
葉綠素a
葉綠素b升高,但可溶性蛋白含量下降,並且隨著處理時間的延長,可溶性蛋白含量的下降更為明顯,處理150d時, t1 、 t2的可溶性蛋白含量與ck
相比分別下降了36 . 7 、 28 . 2 ;高濃度co :處理的前30d ,高濃度c02抑制了go活性, rubpc活性升高:處理以記時,高濃度coz處理組的rubpc活性降低, go活性仍然低於對照;處理以月後,高濃度co :處理組的rubpc活性低於對照,其中t2的rubpc活性顯著下降,而go活性升高。
The cherishing and training of some trees ; the cautious pruning of others ; the nice distribution of flowers and plants of tender and graceful foliage ; the introduction of a green slope of velvet turf ; the partial opening to a peep of blue distance, or silver gleam of water ; ? all these are managed with a delicate tact, a pervading yet quiet assiduity, like the magic touchings with which a painter finishes up a favorite picture
欹斜之樹須正,修枝去
葉,刪繁就簡,所得可謂奉若至寶;枝
葉婆娑,花
葉相映,令人賞心悅目;坡草青青,宛若天鵝絨地毯,光滑細膩;茂林之中偶露一隙,遠處藍天隱約可見,或現一池春水,碧波蕩漾? ?凡此種種,皆為人工造化,潤物無聲,猶如畫師當其畫稿殺青之際得一神來之筆,渾然天成。
Not to inherit by right of primogeniture, gavelkind or borough english, or possess in perpetuity an extensive demesne of a sufficient number of acres, roods and perches, statute land measure valuation 42, of grazing turbary surrounding a baronial hall with gatelodge and carriage drive nor, on the other hand, a terracehouse or semidetached villa, described as rus in urbe or qui si sana, but to purchase by private treaty in fee simple a thatched bungalowshaped 2 storey dwellinghouse of southerly aspect, surmounted by vane and lightning conductor, connected with the earth, with porch covered by parasitic plants ivy or virginia creeper, halldoor, olive green, with smart carriage finish and neat doorbrasses, stucco front with gilt tracery at eaves and gable, rising, if possible, upon a gentle eminence with agreeable prospect from balcony with stone pillar parapet over unoccupied and unoccupyable interjacent pastures and standing in 5 or 6 acres of its own ground, at such a distance from the nearest public thoroughfare as to render its houselights visible at night above and through a quickset hornbeam hedge of topiary cutting, situate at a given point not less than 1 statute mile from the periphery of the metropolis, within a time limit of not more than 5 minutes from tram or train line e. g.,
他並不想根據長子繼承製男子平分繼承製或末子繼承製237 ,把那幢有著門房和馬車道的男爵宅邪及其周圍那一大片遼闊的英畝路得和平方桿238法定土地面積單位,估價為四十二英鎊239的泥炭質牧場地,或者那座被描述為「都會中的田園240 」或「健康莊242 」的有陽臺的房子或一側與鄰屋
相接的別墅,繼承下來並永久佔有。他只巴望根據私人合同購買一所繼承人身分不受限制的不動產:要坐北朝南的一座草屋頂有涼臺的雙層住宅,房頂上裝起風向標以及與地面
相接的避雷針,門廊上要爬滿寄生植物常春藤或五
葉地錦,橄欖綠色的正門最後一道工序漆得漂漂亮亮,賽得過馬車。門上有著精巧的黃銅裝飾。
At the middle period of the 20th century, education informazati - on was born. compare to the developed country, there is a bigg - er distance than me. the main disparity is being the field of the technology
中國的教育信息化始於20世紀中
葉,與世界發達國家
相比,有著不小的差距,這種差距主要體現在技術層面上,經過半個世紀的學習吸取,這種差距在量的方面正在逐步縮小。
As the frog usually lives on ground or inside fallen leaves, its body colour and marking on the back can therefore match with its surrounding environment and provide camouflage effect for the frog
因為它們多數棲于地面或枯
葉堆里,所以它們背部顏色及其斑紋,便會與其周遭環境的顏色
相近,從而產生保護作用。
It is best to use the leaves and flowers of borage when fresh, as they lose their flavor quite rapidly when dried
最佳使用琉璃苣
葉子和花在它新鮮的時候,因為它們
相當迅速地失去它們的味道在乾燥時。
Plants growing in the semi - fixed sand dunes, on the other hand, were less branchy with a larger number of first - year shoots which were longer, and grew faster ; their leaves were longer and wider with a low length / width ratio. the characteristics of the branching system and leaf dimensions of the plants in fixed sand dunes were rather intermediary between those of the above. the frequency distribution and their frequency in the herb layer the scrubs also varied with habitats
丘間低地的黃柳灌叢當年枝平均長度增加緩慢,短枝條的比例較高,當年枝枝長頻度分佈峰值偏左,
葉片短而狹,長寬比大;與之
相比,分佈於半固定沙丘的灌叢當年枝平均長度增加較快,長枝條比例較高,
葉片長而寬,長寬比小;固定沙丘上的上述特徵大致介於二者之間。
She was contacted by kevin john, 45, who learned through a chain of e - mailers in the buckeye network ( fans of ohio state ) that montgomery had his camera
45歲的
相機失主凱文約翰與她聯系,約翰透過俄州大粉絲的七
葉樹網路寄發的電郵連鎖信,得悉蒙哥馬利拾獲他的
相機。
John lost the camera outside the stadium at the sept. 1 ohio state - youngstown state football game after asking a cheerleader to take pictures of him and his 10 - year - old son noah posing with brutus buckeye, the team mascot
約翰在9月1日俄州大對上楊斯頓州大的美式足球比賽當天,于俄州大體育場外要求一名啦啦隊員幫他與10歲兒子諾亞跟俄州大球隊吉祥物布魯特斯巴蓋(七葉樹)合照后,弄丟了相機。