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1)  weed colony
混生杂草群落
2)  weed community
杂草群落
1.
Effect of protective cultivation on weed community composition and species diversity
保护性耕作对农田杂草群落组成及物种多样性的影响
2.
Four weed community groups were divided in 31 sites, one of which was obtained with almost all soybean (com) stubble rape field sites dominated with Galium apalium, and three gro.
利用7 级目测法调查了南京地区油菜田31 个样点的杂草优势度级,并以其重要值为指标,对31 个样点的杂草群落进行计算机模拟聚类分析。
3.
Digitaria sanguinalis+Acalypha australis+Cephalanoplos segetum+Setaria viridis weed community distributed in the cotton fields with the successive .
采用杂草群落和草害的数量研究方法,对江苏省沿海地区棉田杂草草害和群落的发生及分布规律进行了定量调查研究。
3)  weed population
杂草群落
1.
Effects of wheat rotation and monocropping system on weed populations in wheat fields;
小麦连作、迎茬和轮作对麦田杂草群落的影响
2.
Effects of corn rotation and continuous cropping system on weed population;
玉米连作、迎茬和轮作对田间杂草群落的影响
4)  potential weed community
潜杂草群落
1.
Comparing with conventional manual transplanting mode,the other five cultivation modes had their own dominant species in the potential weed community,and thereby,different labor-saving rice cultivation modes should be applied by turns to control the potential weed community in paddy fields effectively and persistently.
为明确轻型栽培技术对稻田潜杂草群落多样性的影响,研究了旱直播、水直播、抛秧、机插秧、麦套稻5种轻型栽培稻作模式及传统手插秧模式下稻田杂草种子库的数量特征。
5)  turf-weed community
草坪-杂草群落
1.
Temporal miche and dynamics of main weed species in turf-weed community in golf courses;
高尔夫球场草坪-杂草群落中主要杂草种类年消长动态及时间生态位
6)  weed community in turf
草坪杂草群落
1.
Composition and characteristics of weed community in turf of Pearl River Delta Region in spring
珠江三角洲地区春季草坪杂草群落组成及其特征
补充资料:多年生杂草
分子式:
CAS号:

性质:寿命在二年以上,一生中能多次开花结实的杂草。主要特点是在开花结实后地上部死亡,依靠地下器官越冬,次年春季从地下营养器官又长出新株。此类杂草除能以种子繁殖外,还能利用地下营养器官进行繁殖,而后者是主要的繁殖方式。根据地下营养器官的特点,多年生杂草可以分为根茎杂草、根芽杂草、直根杂草、块茎杂草、球茎杂草、鳞茎杂草等。如车前(Plantago asiatica L.)、狗牙根[Cynodon dactylon (L.) pers. ]、香附子(Cyperus rotundus L.)、问荆(Equisetum arvense L.)等均为多年生杂草。

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