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weeds
相关语句
  杂草
    Dissipative Structure Theory and Strategy for Systematic Control of Field Weeds.
    耗散结构理论与农田杂草系统控制策略初探
短句来源
    On absorption and accumulation of six heavy metal elements of weeds in Jinhua suburb (Ⅱ)-PCA on relationship between weeds and soil in metal element content
    金华市郊杂草对土壤重金属元素的吸收与富集作用(Ⅱ)-杂草-土壤间重金属元素关系的主成分分析
短句来源
    Enrichment of Cadmium at Different Growth Periods of 4 Weeds in Shenyang Zhangshi with Wastewater Irrigation
    沈阳张士污灌区4种杂草不同阶段富集Cd的研究
短句来源
    Characteristics of accumulation and content of heavy metals of weeds
    杂草对土壤重金属的富集与含量特征研究
短句来源
    Application of Weeds in the Remediation of Soils Contaminated by Heavy Metals
    杂草在土壤重金属污染修复中的应用
短句来源
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  “weeds”译为未确定词的双语例句
    When Bufo gargarizans were exposed to the ghyphosate solutions in dilutions of 1.64, 2.05, 2.87ml/L, (which are the recommended concentrations for killing field weeds,) the reaction time, active potential peak value and impulse conduction velocity of the tested groups were all statistically different from those of the control group.
    草甘膦溶液浓度达到推荐农田使用浓度1.64~2.87ml/L时,各处理组蟾蜍的应激反应时间、动作电位幅度和冲动传导速度均与对照组差异极显著(P<0.01)。
短句来源
    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
    It has been found that some weeds having high enriching abilities of Cu included Poa annua, Soliva anthemifolia, Lepidium virginicum and Bidens frondosa;
    结果表明,对 Cu吸收和富集能力较强的有早熟禾( Poa annua)、裸柱菊( Soliva anthemifolia)、北美独行菜 (Lepidium virginicum)、北美鬼针草( Bidens frondosa);
短句来源
    while the weeds such as Plantago virginica, Poa annua, Soliva anthemifolia and Veronica peregrina had high enriching abilities of Cd and As, respectively.
    对 Cd富集能力较强的是北美车前 (Plantago virginica)、早熟禾、裸柱菊和蚊母草( Veronica peregrina);
短句来源
    The accumulation factor of Cd in the aboveground parts of 8 weeds such as Conyza Canadensis, Znula Britannica and so on was higher than 1, and the Cd content was higher than that in roots, thus possessing basic characteristics of heavy metal hyperaccumulator plant.
    结果表明,小白酒花(Conyza canadensis)、欧亚旋覆花(Znula Britannica)等8种植物地上部Cd的富集系数均大于1,且地上部Cd的含量大于根部Cd的含量,具备了重金属超富集植物的基本特征.
短句来源
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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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More than 1400 sampling plots of 151 sites distributed throughout 13 counties "were surveyed, 88 families, 301 genera and 555 species ( including 15 varieties ) were recorded and sampled.The vicious and main weed species in the Various crop fields and habitates -were determined by the frequencies and dominances of weeds.The results showed that the main features of the weed flora of Taihu agricultural area were as follows; abundant and widely spreaded in species; highly diversified in family and genera;...

More than 1400 sampling plots of 151 sites distributed throughout 13 counties "were surveyed, 88 families, 301 genera and 555 species ( including 15 varieties ) were recorded and sampled.The vicious and main weed species in the Various crop fields and habitates -were determined by the frequencies and dominances of weeds.The results showed that the main features of the weed flora of Taihu agricultural area were as follows; abundant and widely spreaded in species; highly diversified in family and genera; remarkable geographical characteristics of middle and lower Yangtze River valley; dominant anual lifeform; large proportion of hydrophyte and hygrophyte; obvious companionate with crops; sensitive to the environmental factors both ecofo-gical and cultivational.

调查了太湖农业区13县,101乡,151村的1400多块农田及菜圃、桑果园等,采集、鉴定了杂草88科,301属,555种(包括15变种等),并分别查明各作物类型和生境中的杂草种类。根据每杂草种的发生频度和优势指数。明确了恶性杂草和主要杂草种类,为农田杂草防治提供了依据。 研究表明,太湖农业区杂草区系种类极其丰富,广布种甚多;科、属具有多样性;长江中下游地理成分显著;以一年生生活型为主;水、湿生种类较多;杂草与作物伴生性现象明显。杂草分布和发生量除受土壤湿度、土壤pH和光、温等农田生态因子影响外,还受耕作制度、栽培措施和除草剂施用等人为因素的调节。

This paper made a study on the efficacy of the environmental condition in the occurance and distribution of weed in farmlands, based on the systematic investigation on the weed flora of Taihu agricultural area,Jiangsu province.It was sugge- sted that the occurance amount and distribution of the weeds were not only closely effected by the natural ecological factors in fields, such as water, soil pH, light, temperature, etc,, but also remarkably controlled by the artificial ecological conditions as cultivation...

This paper made a study on the efficacy of the environmental condition in the occurance and distribution of weed in farmlands, based on the systematic investigation on the weed flora of Taihu agricultural area,Jiangsu province.It was sugge- sted that the occurance amount and distribution of the weeds were not only closely effected by the natural ecological factors in fields, such as water, soil pH, light, temperature, etc,, but also remarkably controlled by the artificial ecological conditions as cultivation regime, faming technique, herbicide application arid other activities of human being.The weed control strategy of integrating the weed quarantine, weed occurance forecast, chemical control, cultivation regime,faralng technique, biologicall control and weed biomass utilization was also discnsaed in accordance with the biological properties of weeds under different coaditions.

作者在对江苏省太湖农业区田园杂草区系作过系统、全面调查的基础上,对影响农田杂草发生、分布的环境因素作了进一步的研究,认为杂草的发生量和分布除受土壤水分、土壤pH、光、温等农田自然生态因子影响外,还受耕作制度、栽培措施、除草剂施用、引种调种等人为生态因子的制约。并根据杂草在各生态环境下的生物学特性、提出以杂草检疫,杂草测报、化学防治、耕作制度防治、生物防治及杂草生物量利用相结合的杂草综合防治策略。

An experiment was conduted to study growth of weeds under plow—tillage, surface—tillage and no—tillage on paddy field after rice.It was showed that growth of weeds were significantly affected by tillage.As compared to plow —tillage and surface—tillage,no—tillage was conducive to fhe growth of Alopecurus anurensis Komar and was able to control the growth of Galium aparine L.and Seellaria media(L.)cyr.The growth of weeds was significantly related to term when tillage was conducted as well。

本试验研究了在翻耕、浅耕和免耕三种土壤耕作方式下稻茬油菜田不同种类杂草的发生情况。其结果表明:与翻耕和浅耕相比,免耕可使看麦娘等杂草数量增加而使猪殃殃、繁缕等恶性杂草的数量减少。杂草的发生与耕作进行的时期也有较大关系。

 
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