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major weeds
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  主要杂草
     The damage rate of major weeds to tea growth ranged 22%-100% (in density of 30plants/m2).
     10种主要杂草对茶树生长危害率为22%~100%(30株/m~2);
短句来源
     The yield decrease caused by 14 major weeds were 7-50% (10 plants/m2) .
     14种稻田主要杂草使水稻减产率分别为7~50%(10株/m~2);
短句来源
     Stellaria media is one of major weeds on truckcrop fields in Shanghai during winter and spring.
     繁缕(Stellaria media)不仅发生于上海郊区的麦田,且为冬春菜田的主要杂草之一。
短句来源
     According Li Shan-lin' report, in China there are about 450 species weeds,belong to 45 Families 127 families. thereinto the major weeds are 60 speces.
     我国草坪杂草的种类很多,据统计,我国草坪杂草近450种,分属45科127属,其中主要杂草有60种之多。
短句来源
     There were 29 species of major weeds with 14 families in paddy field at Yuqing county. The broad leaf weed was superior, making up 87.5% of total occurrence. The weeds of sedge family (Cyperaceae) and grass family (Gramineae) made up 11.9% and 0.6% respectively.
     余庆县水稻田本田主要杂草共14科29种,以阔叶杂草为优势种,占总发生量的87.5%,莎草科杂草11.9%,禾本科杂草0.6%。
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  “major weeds”译为未确定词的双语例句
     Most major weeds are C 4 plants, while many crops are C 3 plant. Therefore,different effects of elevated atmospheric CO 2 have important implications for weed/crop interaction.
     由于许多重要的杂草是C4植物 ,而许多重要的作物是C3 植物 ,CO2 浓度升高对杂草 /作物的相互关系将有重要影响 .
短句来源
     DISTRIBUTION AND INFESTATION OF MAJOR WEEDS IN COTTON FIELDS IN CHINA AND THEIR CONTROL
     中国棉田杂草的分布危害及防除
短句来源
     The weed species, abundance and their damage to the rape in Huaihua region are reported. It is found that there are 25 species for major weeds, belonging to 13families.
     对湖南农业大学教学试验基地(位于湖南省怀化市境内)的油菜田进行了调查,发现常见的杂草共有13个科25种杂草。
短句来源
     The results showed that there were 21 species for major weeds and the component of aquatic weed community were Potamogeton distintus A.
     常见杂草种类有 2 1种。
短句来源
  相似匹配句对
     The Major Weeds and Control of Wheatfield in Huaihe River Area
     淮河流域小麦田主要杂草及其防除
短句来源
     OCCURRANCE AND DIMINISHING LAW OF MAJOR FIELD WEEDS IN SHANGHAI
     上海农田主要杂草田间发生消长规律
短句来源
     FORMATION OF WEEDS
     杂草的形成
短句来源
     Major results are:
     主要研究结果如下:
短句来源
     The major conclusions are:
     具体来看,其主要结论为:
短句来源
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  major weeds
These allelochemicals had different biological actions on major weeds and soil pathogenic fungi in the citrus orchard.
      
Investigations showed that the inhibition of major weeds and soil pathogenic fungi in citrus orchards was significantly correlated with the allelochemicals released into the soil by intercropped A.?conyzoides.
      
This is because several plant families such as the Chenopodiaceae, Amaranthaceae, Graminae (Poaceae) and Compositae have wide-spread, abundant, anemophylous taxa which occur as major weeds of both agriculture and waste places.
      
Host status of six major weeds to Meloidogyne chitwoodi and Pratylenchus penetrans, including a preliminary field survey concern
      
Major weeds species for both Fraser Island and Cooloola have been identified and their general distribution mapped.
      


Stellaria media is one of major weeds on truckcrop fields in Shanghai during winter and spring. The weed produced numerous seeds had the strong viability and the long longevity and the seeds might also pass through the gut of animals intactly.Stellaria media could be infected by cucumber mosaic virus (CMV) turnip mosaic virus (TuMV), tobacco mosaic virus (TMV) and so on. In regard to CMV, which was seed-borne as well as aphids and mechanical transmission, so the ratio of diseased seeds and the disease...

Stellaria media is one of major weeds on truckcrop fields in Shanghai during winter and spring. The weed produced numerous seeds had the strong viability and the long longevity and the seeds might also pass through the gut of animals intactly.Stellaria media could be infected by cucumber mosaic virus (CMV) turnip mosaic virus (TuMV), tobacco mosaic virus (TMV) and so on. In regard to CMV, which was seed-borne as well as aphids and mechanical transmission, so the ratio of diseased seeds and the disease incidence of natural infection were high. Because of the competition and selection in fields for long time, it showed latent infection on the host, which was neglected since the weed was a very important host for several viruses during winter and spring.Therefore the weed eradication had the great significance for the control of the several viruses on the truckcrops.

繁缕(Stellaria media)不仅发生于上海郊区的麦田,且为冬春菜田的主要杂草之一。它的种子数量多,休眠期长,植株的茎纤弱,着地后的每个茎节都能生根,并从叶腋萌发产生新的植株。这种杂草能感染黄瓜花叶病毒(CMV)、芜青花叶病毒(TuMV)和烟草花叶病毒(TMV)等等。对CMV来讲,它能由种子或蚜虫传播,又极易摩擦接种,而且种子带毒率和自然感病率又较高,尤其是在田间长期竞争和选择下,繁缕对该病呈非显性感染,不易引起人们重视。可见,繁缕是CMV等的一种非常重要的越冬寄主。因此。铲除繁缕等杂草,切断毒源,对控制植物病毒病(特别是CMV)有着不可忽视的实际意义。

This paper gives some results of our investigation and study on the subject of“The Paddy Field Weeds in Fujian Province and Their Centrols.” In 16 typical counties or cities,through the investigation we grasped the constitution of paddy field weeds in Fujian and ascertained the major weeds of paddy field.The major paddy field weeds at all sites were Echinochloa crusgalli,Monochoria vaginalis,Rotala indica,Marsilea quadrifolia,Murdan- nie triquetra,Scirpus juncoides,Sagittaria pygmaea,Cyperus...

This paper gives some results of our investigation and study on the subject of“The Paddy Field Weeds in Fujian Province and Their Centrols.” In 16 typical counties or cities,through the investigation we grasped the constitution of paddy field weeds in Fujian and ascertained the major weeds of paddy field.The major paddy field weeds at all sites were Echinochloa crusgalli,Monochoria vaginalis,Rotala indica,Marsilea quadrifolia,Murdan- nie triquetra,Scirpus juncoides,Sagittaria pygmaea,Cyperus diformis. We analysed the relationship between the generation and distribution of paddy field weeds and the different geographic locality,soil type,cropping systems,soil management and the rice growth in the paddy field.We also discussed the problem of weed study and their control on paddy field of dif- ferent area and soil type.

本文报导了福建稻田杂草及其防除研究的部份结果。通过在16个典型县(市)的调查,掌握了福建稻田杂草的组成结构,明确了主要杂草是稗草、鸭舌草、节节草、田字萍、水竹叶、萤蔺、矮慈姑和异型莎草等8种。探讨了稻田不同地理位置、土壤类型、种植制度、土壤管理以及水稻生长情况与稻田杂草发生分布的关系,讨论了福建不同地区、不同类型稻田在杂草防除及其研究方面的有关问题。

There were 29 species of major weeds with 14 families in paddy field at Yuqing county. The broad leaf weed was superior, making up 87.5% of total occurrence. The weeds of sedge family (Cyperaceae) and grass family (Gramineae) made up 11.9% and 0.6% respectively. There were two peaks of occurrence period. The first appeared about 15 to 30 days and the second about 25 to 50 days after transplanting. Rice yield was reduced by 2 % with 1 plant /m2 barnyardgrass and by 38% with 10plants/m2.The efficiency...

There were 29 species of major weeds with 14 families in paddy field at Yuqing county. The broad leaf weed was superior, making up 87.5% of total occurrence. The weeds of sedge family (Cyperaceae) and grass family (Gramineae) made up 11.9% and 0.6% respectively. There were two peaks of occurrence period. The first appeared about 15 to 30 days and the second about 25 to 50 days after transplanting. Rice yield was reduced by 2 % with 1 plant /m2 barnyardgrass and by 38% with 10plants/m2.The efficiency of control reached

余庆县水稻田本田主要杂草共14科29种,以阔叶杂草为优势种,占总发生量的87.5%,莎草科杂草11.9%,禾本科杂草0.6%。杂草的发生以水稻移栽后15~30天和25~50天先后出现两个高峰期。1株/m~2稗草,水稻减产2%,10株/m~2稗草,减产38%。5.3%去西合剂防除稻田多种一年生杂草效果达85%以上。

 
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