perennial plants 中文意思是什麼
perennial plants
解釋
多年生植物-
Vegetation dynamics and soil characteristics of different period abandoned land was conducted in typical steppe at xilinguole league and meadow steppe at hulunbeier league, inner mongolia. the results showed : the function community of annual plants, perennial rhizornatous grasses and perennial rosette grasses were appeared at different succession stage of abandoned land in typical steppe and meadow steppe
本試驗分別在內蒙古錫林郭勒盟典型草原帶和呼倫貝爾盟草甸草原帶對不同撂荒年限的撂荒地植被動態及土壤特性進行了研究，目的是探討草原區撂荒地植被演替的規律，為撂荒地植被的重建提供理論依據。 -
This is so because climbing plants are likely to encounter intensive - changing environmental condition during their growth ( especially change of illumination ). secondly, there is a large proportion ( 30 - 40 % ) of climbing plants which belong to dioecism, and hence a gap between male and female plants on morphology, biological characteristic, economic value and so on. this dissertation focuses on herbaceous climbing plants, perennial or annual species such as dioecious trchosahthes kirilowii maxin and dioscorea opposita thumb, and monoecious luffa cylindrical ( l ) roem, it attempts to discover how climbing plants adapted to various environments and the mechanism of adaptation from aspects of physiological and reproductive ecologies at present, due to overuse of chlorofluorocarbons ( cfcs ), the ozonosphere has become thinner and thinner, and the ultraviolet - b ( uv - b ) radiation has increased considerably
而攀援植物本身是一類理想的植物行為生態學研究材料：第一，攀緣植物由於受攀緣能力和支柱木資源的限制，在生長過程中通常要遇到強烈變化的環境條件（特別是光照） ；第二，攀緣植物中具有較高比例的雌雄異株類型，通常佔地區攀緣植物種類的30 40左右，不同性別的植物在形態學及生物學特性、經濟價值等方面存在一定的差距，因此，本文以雌雄異株攀緣植物栝樓（ trchosahtheskirilowiimaxim ） （葫蘆科多年生草質藤本植物）和山藥（ dioscoreaoppositathunb ） （薯蕷科薯蕷屬植物） 、雌雄同株異花攀緣植物絲瓜[ luffacylindrical （ l ） roem ] （葫蘆科一年生攀緣草本植物）為材料，試圖從生理生態學及生殖生態學角度揭示攀援植物如何適應不同生境及其機理。 -
The host plants were ornamental plants, perennial / biennial root garden plants, woody flower plants, cover plants and pulpy plants, and so on
為害的寄主植物有觀賞樹木、宿根園林植物、木本花卉植物、地被植物及多漿植物等。 -
With the increase of abandoned time, perennial plants increased, the function communities were richer, p diversity index in two communities reduced with abandoned interval, but the vegetation restoration was slow, the land abandoned for 30 years have not got to climax community
隨撂荒年限的增加，多年生植物的種類和數量逐漸增加，植物群落功能群構成逐漸豐富，群落間多樣性指數隨撂荒時間間隔的增大而逐漸減小。但植被恢復緩慢，撂荒30年仍未達到頂極群落階段。 -
Fruit trees are very important economic crops in people ' s life, the losses of fruit production caused by iron chlorosis are usually higher than those of other annual economic crops because fruit tress, as perennial plants, will remain there for many years after they are planted in a field and an evident accumulation effect may take place
果樹作為一種與人民生活密切相關的重要經濟作物，由於其本身的特點，缺鐵造成的產量損失遠比一年生作物嚴重，因為果樹一旦栽培在土壤中便很多年不移動，所以有明顯的缺鐵積累效應。 -
Forages usually consist of perennial plants that must be managed in order to maximize long term yield, he says
「牧草通常由一些多年生植物組成，為了實現長期高產，必須對它們進行管理。 」他說。 -
The - proportion of life - form of all plants in the city zone is similar to that in the mountains, while the proportion of the amount of perennial herbs is dominant in the mountains, which is led to the significant difference of the amount of species between the mountains and the city zone
在屬級水平上，植物區系中溫帶成分在北京山區和城區均佔有絕對優勢，二者的差異主要表現在城區植物的熱帶成分明顯高於山區，而溫帶成分的比例則要稍低於山區。
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