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是多年生
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  a perennial
    Leymus chinensis is a perennial gramineous grass with long rhizomes. It is a kind of high grade pasture growing in light saline-alkali areas in the north of China and it distributs in Mongolia and nature plains of Northeast.
    羊草(Leymus chinensis)是多年生根茎型禾草,广泛分布于内蒙古和东北天然草原,是在我国北方地区轻度盐碱地上生长良好的优质牧草。
短句来源
    Leymus chinensis a member of Gramineae Leymus is a perennial gramineous grass with long rhizomes , which is a dominating grass species in songnen grassland. It has widely ecological scope, which can grow with Aeluropus sinensis, Puccinellia tenuiflora and Suaeda glauca.
    羊草(Leymus chinensis)是多年生根茎型禾草,属于禾本科(Gramieae)赖草属(Leymus),是松嫩草地羊草草原的优势植物,是耐盐碱性较强的一种优质牧草,它的生态分布幅度很宽,能和獐毛(Aeluropus sinensis)、星星草(Puccinellia tenuiflora)碱蓬(Suaeda glauca)等耐盐碱性较强的植物组成混合群落。
短句来源
    B.carticus is a perennial forage crop with the strong freeze resistance, early turning green, quick growth, higher yield, good nutritive value and strong disease resistance, which is a better forage crop planted winter and early spring.
    扁穗雀麦是多年生禾本科饲料作物 ,具有特别耐寒、返青早、生长快、产草量高、营养价值好、抗病力强的特点 ,是冬季及早春生长利用较好的饲草作物。
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  “是多年生”译为未确定词的双语例句
    The plants of Aloe belong to Liliaceae, they are multiperennial, evergreen and succulent plants.
    芦荟属(Aloe)植物隶属于百合科(Liliaceae),是多年生、常绿、肉质草本植物。
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    The underground biomass was higher in high density than that in low density. The root is the main competitive position of perennial plants.
    在生长末期地下生物量的调查,高密度的地下生物量大于低密度地下生物量,高密度根系竞争激烈,是多年生植物竞争主要部位。
短句来源
    Leymus chinensis belongs to Gramineae Leymus, it is a kind of perennial rhizome forage, which has many advantages such as high productivity, extensive adaptation, strong stress resistance, good palatability, and nutritive value. It is widely distributed in east plain of Inner-Mongolia and west plain of Northeast.
    羊草(Leymus chinensis)隶属于禾本科赖草属,是多年生根茎型的牧草,具有产量高、适应性广泛、抗逆性强、动物适口性好、营养丰富等优点,在我国内蒙古东部和东北西部草原广泛分布。
短句来源
    Therefore,to breed high--yield,adversity —resistance and super—quality castor varieties as soon as possible is the key to speeding up castor produc- tion.
    因此,尽快培育高产、优质、抗逆的蓖麻品种是多年生蓖麻获得发展的关键。
短句来源
    Rhubarb is herbaceous plant and has not only good medical value but also well ecological protection and function of keeping water and soil.
    大黄是多年生草本植物 ,除优良的药用价值外 ,还具有良好的生态防护和水土保持功能。
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  a perennial
Psathyrostachys huashanica Keng is a perennial grass and belongs to genus Psathyrostachys under Triticeae.
      
Solidago canadensis, a perennial Compositae plant originating from North America, was introduced into China as a horticultural plant in 1935.
      
Leymus chinensis (Trin.) Tzvel is a perennial grass in the tribe Gramineae and important forage in Northern China.
      
Seasonal changes in the anatomical and morphological structure and metabolic activity of rhizomes were studied in a perennial grass reed canary-grass (Phalaroides arundinacea (L.) Rauschert).
      
Reaumuria soongorica (Pall.) Maxim., a perennial semi-shrub, is widely found in semi-arid areas in northwestern China and can survive severe desiccation of its vegetative organs.
      
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According to preliminary results of the investigation since 1963, the characteristics of three wild rice species and their geographical distribution in China are summarized as follows:1. The common wild rice (Oryza sativa f. spontanea) : Distributed in the area of 18°15'-25°00' north latitude, which was perennial and ratooned, heading from September to November with culm height of 100-150 cm, growing prostrately in. swamps, ponds or along the stream and river banks. The heads were loose and thinly bearing grains,...

According to preliminary results of the investigation since 1963, the characteristics of three wild rice species and their geographical distribution in China are summarized as follows:1. The common wild rice (Oryza sativa f. spontanea) : Distributed in the area of 18°15'-25°00' north latitude, which was perennial and ratooned, heading from September to November with culm height of 100-150 cm, growing prostrately in. swamps, ponds or along the stream and river banks. The heads were loose and thinly bearing grains, which appeared more slender of about 8-9 mm long, apiculus with a long awn, the stigma exposed outside of the spikelet during flowering. The matured grains were dark-brown or yellowish-brown coloured and easy to shed.2. The medicinal wild rice (O. offieinalis) : Mainly distributed in valleys of 18°25' to 24°10' north latitude, where the sunshine are scarce and with dence humidity. It was perennial, ratooned and heading between October and November. The culms were 200-300 cm in height, tugid and dispersing. The neck of panicle were particularly long (sometimes over 80 cm), with short-rounded grains of about 4-5 mm in length. The panicles bear hundreds of spikelets, apiculus with a short awn about 1-2 cm in length. The matured grains were greyish-brown coloured and easy to shed.3. The verrucose wild rice (O. Meyeriana): Mainly distributed on the slope along river-banks and also grown among shrubberies in deep valleys from 18°10' to 24°46' north latitude. The leaves and culms were grown like bamboos. Perennial, ratooned, unceasingly heading and ripening through all the year. Each panicle consists of 10-15 spikelets approximately, which were tightly connected with the peduncles. The grain length was about 4.5-5.5 mm. The matured grains were yellowish-brown coloured. Apieulus is awnless. The surface of glume was glabous and with irregular, minute tuberculates and shedding easily.The prospect about the application of the common wild rice in plant breeding has also been discussed and foreshadowed in the present paper.

根据1963年以来的调查和观察,初步鉴定了三个野生稻种的特征特性,以及在我国的地理分布。 1.普通野生稻(oryza sativa f.spontanea):在北纬18°15′至25°00′的范围内均有分布。多年生,宿根性,9—11月出穗,株高100—150厘米,匍匐生长在沼泽地、草塘或溪河沿岸。穗枝披散,着粒疏,谷粒狭长,粒长8—9毫米,稃端具长芒,柱头外露,谷粒成熟时黑褐色或黄褐色,易落粒。 2.药用野生稻(O.offficinalis):主要分布在北纬18°25′至24°10′范围内寡照和湿润的山谷中。多年生,宿根性,10—11月间出穗,株高200—300厘米,秆强硬散生,穗颈特长(有时达80厘米以上),粒短圆,粒长4—5毫米,每穗数百粒,稃端具1—2厘米的短芒,谷粒成熟时灰褐色,易落粒。 3.疣粒野生稻(O.meyeriana):主要分布在北纬18°10′至24°46′范围内沿江坡地和高山河谷的灌木丛林中。多年生,宿根性,株高30—40厘米,茎叶形似竹子,终年不断出穗成熟,每穗约10—15粒,紧贴穗轴,粒长4.5—5.5毫米,成熟粒呈黄褐色,光稃无芒,但稃表面有不规则的小疣粒状突起,易落粒。 本文还对...

根据1963年以来的调查和观察,初步鉴定了三个野生稻种的特征特性,以及在我国的地理分布。 1.普通野生稻(oryza sativa f.spontanea):在北纬18°15′至25°00′的范围内均有分布。多年生,宿根性,9—11月出穗,株高100—150厘米,匍匐生长在沼泽地、草塘或溪河沿岸。穗枝披散,着粒疏,谷粒狭长,粒长8—9毫米,稃端具长芒,柱头外露,谷粒成熟时黑褐色或黄褐色,易落粒。 2.药用野生稻(O.offficinalis):主要分布在北纬18°25′至24°10′范围内寡照和湿润的山谷中。多年生,宿根性,10—11月间出穗,株高200—300厘米,秆强硬散生,穗颈特长(有时达80厘米以上),粒短圆,粒长4—5毫米,每穗数百粒,稃端具1—2厘米的短芒,谷粒成熟时灰褐色,易落粒。 3.疣粒野生稻(O.meyeriana):主要分布在北纬18°10′至24°46′范围内沿江坡地和高山河谷的灌木丛林中。多年生,宿根性,株高30—40厘米,茎叶形似竹子,终年不断出穗成熟,每穗约10—15粒,紧贴穗轴,粒长4.5—5.5毫米,成熟粒呈黄褐色,光稃无芒,但稃表面有不规则的小疣粒状突起,易落粒。 本文还对普通野生稻在植物育种工作中利用的前景进行了讨论和展望。

A study on barley hybridization had been carried out using Some hybrids between varieties of H.distichum(2n = 2x = 14)as the female parent and H.bulbosum USSR(2n=4x = 28)as the male parent.By culturing in vitro young embryos which had been treated with GA3 on stigmas one day after pollination,we had obtained relatively large number of hybrids.According to morphology,these hybrids might be classified into three types,in only about 5% of the plants,chromosome doubling(2n = 14)had taken place,those were of the...

A study on barley hybridization had been carried out using Some hybrids between varieties of H.distichum(2n = 2x = 14)as the female parent and H.bulbosum USSR(2n=4x = 28)as the male parent.By culturing in vitro young embryos which had been treated with GA3 on stigmas one day after pollination,we had obtained relatively large number of hybrids.According to morphology,these hybrids might be classified into three types,in only about 5% of the plants,chromosome doubling(2n = 14)had taken place,those were of the barley type,about 95% were of the two intermediate types,H.distichum-like andd H.bulbosum-like types.These two intermediate types were perennial with bulbs.The chromosome number of them was 15-21(triploid).They were self-sterile and did not bear grain when they were backcrossed to either parent.

以二棱大麦品种间杂交种F_1(2n=2x=14)为母本,以苏联球茎大麦(2n=4x=28)为父本,进行种间杂交,授粉一天后。在母本柱头滴赤霉酸(GA_3),并结合离体培养杂种幼胚,获得较多二棱大麦与球茎大麦的种间杂种,根据杂种植株形态和染色体组成,可分成三种类型,其中只有约5%的植株的染色体加倍成功,为大麦型(2n=14);其余95%植株的形态表现为偏大麦型与偏球茎型的两种中间型,且均为具球茎的多年生习性;其染色体数在15—21之间:目交不育,用父母本回交亦未结实。

According to the morphological characteristics and chromosomal numbers of the somatic cell of the three wild rices iu China, basing on the International Code of Botanical Nomenclature, the. latin .names of them should be established as follows:1 . The common wild rice is Oryza rufipogon Griff.2 . The medicinal wild rice is Oryza officinalis Wall, et Watt3 . The verrucose wild rice is Oryza meyeriana Baill. subsp. granu -lata (Nees et Arn. ex Watt ) TateokaThe characteristic of common wild rice has striking distinction...

According to the morphological characteristics and chromosomal numbers of the somatic cell of the three wild rices iu China, basing on the International Code of Botanical Nomenclature, the. latin .names of them should be established as follows:1 . The common wild rice is Oryza rufipogon Griff.2 . The medicinal wild rice is Oryza officinalis Wall, et Watt3 . The verrucose wild rice is Oryza meyeriana Baill. subsp. granu -lata (Nees et Arn. ex Watt ) TateokaThe characteristic of common wild rice has striking distinction as compared with the cultivated rice (Oryza sativa) . It is perennial, with stolon and ramified stem and the anther is longer. The matured grians are easy shedding, so it must be accorded a species standing.Because of the chromosomal numbers of medicinal wild rice is 2n=24, so the Chinese species must be called Oryza of ficinalis.The spikelet length of verrucose wild rice in China is 4.5-7.0 mm, and so its latin name is Oryza meyeriana subsp. granulata.

根据中国三种野生稻的形态特征和体细胞染色体的数目以及国际植物命名 法规,确认三种野生稻的拉丁学名如下: 1.普通野稻为Oryza rufipogon Griff. 2.药用野稻为Oryza officinalia Wall.et Watt 3.疣粒野稻为Oryza meyeriana Baill.subsp.granulata (Nees et Arn.ex Watt)Tateoka 例如,普通野稻与稻的特征有显著的区别。普通野稻为多年生植物,具匍匐 茎,地上具分枝,花药特长,谷粒成熟易脱落,所以应当成立种。 因为药用野稻的染色体数目为2n=24,所以中国种应当称为Oryza Officinalis。 中国产的疣粒野稻的小穗长度为4.5-7.0毫米,故其拉丁名是Oryza meyerianasubsp.granulata

 
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