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weeds
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  杂草
    Molecular Characterization of Geminiviruses and Their Associated DNAβ Molecules Infecting Crops and Weeds in Yunnan
    云南省几种作物及杂草上双生病毒及伴随的DNAβ的分子鉴定
短句来源
    In comparison with nonrice-cotton otation, the net economic income of rice-cotton rotation increased 10.96%-14.50% and the amount of weeds and incidence of crop disease dropped obviously.
    与未稻棉轮作的相比,稻棉轮作的经济纯收入增加10.96%—14.50%,田间杂草和作物病害大为减少。
短句来源
    The results indicated that the largest number of arthropod species and the least number of individuals were in the treatment with weeds (P<0.05), and the least number of arthropod species and the largest number of individuals were in the treatment without weeds (P<0.05).
    植食性类群的物种数和个体数在单作无杂草的枣园显著(P<0.05)大于其间作类型的枣园,而捕食性和寄生性的物种数和个体数则明显(P<0.05)小于其间作类型的枣园,而在有杂草的枣园则相反。
短句来源
    THE DIVISION OF FIELD WEEDS IN GANSU
    甘肃省农田杂草区划
短句来源
    STUDIES ON SOIL FERTILITIES,WEEDS CHANGES AND EFFECTS OF WATER ARID SEQUENTIAL CROPPING PATTERNS IN CONTINUING NON TILLED WINTER PADDY
    冬水田水旱复种连续免耕的效益及土壤肥力和杂草动态研究
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  “weeds”译为未确定词的双语例句
    Effects of enhanced UV-B radiation on population quantity dynamics of weeds,soil macroanimals and wheat aphids in the wheat field ecosystem
    增强的UV-B辐射对麦田生态系统中种群数量动态的影响
短句来源
    ALLELOPATHY OF WHEAT EXTRACTION TO THE GROWTH OF TWO WEEDS
    小麦提取物对反枝苋、繁缕生长的化感效应研究
短句来源
    The Incidence Patterns of Disease, Pest, Weeds and Rats on Crops in Mianyang City and The Comprehensive Strategies
    绵阳市作物病虫草鼠危害的特点及综防对策
短句来源
    Study on Effect of Weeds Control Measure to Soil and Water Conservation on Slope Garden
    不同除草处理对经济林果园地水土保持作用的初步研究
短句来源
    Expert System of Diagnosis and Controlling for Maize Disease, Pest and Weeds in Province
    吉林省玉米病虫草害诊治专家系统
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  weeds
canadensis including length, surface area, volume, and average diameter are greater than for composite exotic weeds.
      
Information on specific features of distribution and activity of introduced species growing feral and accidental weeds in different forest types is presented.
      
Cultivated plants and weeds in fields of the Penza Volga region in the middle ages
      
Geobotanical investigations demonstrated that the transformation of the species composition of herbs from weeds to predominantly meadow plants occurred in five-ten years after the soil was no more used for farming.
      
The algorithm separates the weed area from soil background according to the color eigenvalue, which is obtained by analyzing the color difference between the weeds and background in three color spaces RGB, rgb and HSI.
      
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The Farming-Animal Husbandry-Fishery System has existed fora long time is Widely distributed and has been developed recen-tly in Jiangxi grain producing area,especially in rice regions.Itsimportant significance is to combine farming,animal husbandry andfishery together in order to use local natural agricultural resourceseffectively and forming a farming system in a good state.Themain products such as rice,soybean,vegetable oil,provide foodfor humans and agricultural by-products as straw,rice bran andoil bean...

The Farming-Animal Husbandry-Fishery System has existed fora long time is Widely distributed and has been developed recen-tly in Jiangxi grain producing area,especially in rice regions.Itsimportant significance is to combine farming,animal husbandry andfishery together in order to use local natural agricultural resourceseffectively and forming a farming system in a good state.Themain products such as rice,soybean,vegetable oil,provide foodfor humans and agricultural by-products as straw,rice bran andoil bean cake which are unsuitable for humans are good feedsfor domestic animals and increase the farmer's income.The ani malhusbandry provides farm manure for rice fields.Water is thelifeline of rice.There are many ponds,resevoirs,lakes,rivers,em-bankments and irrigated canals in rice areas.They are not onlythe water source of irrigation for rice but also a good place forfisheries.Aquatic weeds,decaying organic matter and running nutri-tive water are good feedstuff for fish.In addition,throwing inthe bait,control disease and the income of fish ponds is severaltimes higher than for the same rice areas.Ponds silt can beused as manure for rice.During the rice-growing season,the ricefield holds water is a favorable condition for fishery.The fishfeeds the weeds and insects(larva or adult),disturb the upperlayer of soil and increased oxygen permuates the subsoil whichis favorable to rice growth.The fishes'’excrement is both manurefor rice and food for plankton,thus increasing the yield both riceand fish.Thus to develop F-A-F system is very important torice region for increasing both yield and income in jiangxi andproviding useful experience to same condition area in the world.The system may be diagramed as above fig.1.This paper's three main subjects will be discussed as follows:first,the importance of multiple cropping system to increase agric-ultural production in jiangxi province;second,the combination offarming and animal husbandry;third,fishery in rice field.

农—牧—渔业系统即农牧渔业综合发展的路子,其重要性在于把农、牧、渔三者有机结合起来,充分利用资源,形成良性循环的耕作制度。江西地处中亚热带地区,气候雨量都宜发展一年多熟,粮食与多种经营综合发展,有利于实现农牧渔业系统。本文分三部分:一、发展多熟高产是江西农业增产的主要途径,介绍自然条件,作物主要复种方式,多熟制的优越性和作用。1984年比1949年耕地仅增0.7%,而粮食增加3倍,经济作物、生猪各增5倍,牛增57%,人口增1.6倍。是什么创造了奇迹?关键是发展多熟制与提高单产同时并举、双季稻面积增加4倍和单产提高1.5倍具有战略意义。一年多熟可充分利用土地和光能,是稳产的保证和高产的基础,世界人口激增,形势将迫使人们采取一切方法发展多熟制,尽量增产粮食。二、农牧结合,介绍结合的必要性、途径和优点。粮多—畜牧多—肥多—粮多,已形成良性循环。江西有丰富的农副产品和四千多万亩草山草坡,是发展畜牧的优越条件,同时又是转化粮食增收创汇的出路,结合则两利,不结合则两败。三、农渔结合,江西水面占土地面积10%,水田占耕地85%,是发展渔业的有利条件,稻田养鱼是充分利用前所未用的资源,具有投资少、见效快、效益高的优点,技术掌...

农—牧—渔业系统即农牧渔业综合发展的路子,其重要性在于把农、牧、渔三者有机结合起来,充分利用资源,形成良性循环的耕作制度。江西地处中亚热带地区,气候雨量都宜发展一年多熟,粮食与多种经营综合发展,有利于实现农牧渔业系统。本文分三部分:一、发展多熟高产是江西农业增产的主要途径,介绍自然条件,作物主要复种方式,多熟制的优越性和作用。1984年比1949年耕地仅增0.7%,而粮食增加3倍,经济作物、生猪各增5倍,牛增57%,人口增1.6倍。是什么创造了奇迹?关键是发展多熟制与提高单产同时并举、双季稻面积增加4倍和单产提高1.5倍具有战略意义。一年多熟可充分利用土地和光能,是稳产的保证和高产的基础,世界人口激增,形势将迫使人们采取一切方法发展多熟制,尽量增产粮食。二、农牧结合,介绍结合的必要性、途径和优点。粮多—畜牧多—肥多—粮多,已形成良性循环。江西有丰富的农副产品和四千多万亩草山草坡,是发展畜牧的优越条件,同时又是转化粮食增收创汇的出路,结合则两利,不结合则两败。三、农渔结合,江西水面占土地面积10%,水田占耕地85%,是发展渔业的有利条件,稻田养鱼是充分利用前所未用的资源,具有投资少、见效快、效益高的优点,技术掌握好,矛盾处理得当便能鱼稻双丰收。

The sugar beet cultivated with film mulching caa increase the soil temperature significantly, and it can keep the soil moisture, decrease the soil volume weight, get more porosities and soil air, accelerate the growth of microorganism and its reproductive capacity, and decompose organic matter, improve the effect of quick-acting nutrition and photosynthesis of beet leaves, inhibit weeds, and can increase the sugar yield, economic benefits in widely range.

甜菜覆膜明显地提高土壤温度,并具有保蓄土壤水分和提墒、降低土壤容重、增加孔隙度和土壤空气、促进微生物生长及繁殖活动能力、加速有机质的分解以及提高土壤速效养分等作用,有利于叶的光合作用,抑制杂草,减轻草害,因而大幅度提高甜菜产糖量,经济效益高。

The conventional tillage system, such as harrowing, weeding by dig-ging and tillage rotation, etc., often causes severe soil loss. It is of greaturgency to perform no till as the strategy of soil conservation. The sys-tem in no till can not only conserve soil and water efficiently, but alsoraise soil fertility and increase production and other benefit, saving man-power and reducing the input.The present obstruction is thought mainlyin conservative ideas, following old convention and unavailable tillagemehods....

The conventional tillage system, such as harrowing, weeding by dig-ging and tillage rotation, etc., often causes severe soil loss. It is of greaturgency to perform no till as the strategy of soil conservation. The sys-tem in no till can not only conserve soil and water efficiently, but alsoraise soil fertility and increase production and other benefit, saving man-power and reducing the input.The present obstruction is thought mainlyin conservative ideas, following old convention and unavailable tillagemehods. It is suggested to encourage and reward the farmers performingno till, to manufacture weed killers in low price, high efficiency and nopollution, to set model experiment to promote the work in larger areaand to spread in full scale, to obolish conventional tillage system gradu-ally using administrative and economic means.

中耕除草、深翻轮休等传统耕作制度,常常造成严重的水土流失。实行免耕种地,作为水土保持的战略对策,是当务之急。免耕法不仅能有效的保持水土,而且能提高土壤肥力,增产增收,节省劳力和减少投入。目前的障碍,主要是思想保守,沿袭守旧,免耕制度不配套。建议奖励实行免耕的农户;研制价廉、高效和无污染的除草剂;先办试点,以点带面,全面铺开;用行政和经济手段逐步废除传统耕作制。

 
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