1)weed population杂草种群
1.Important values of 20 weed populations belong to 19 genera,8 families in wheat fields of Nanjing City and Chuzhou City were investigated,and the principal component analysis (PCA) of main weed populations were conducted.对江苏省南京市和安徽省滁州市麦田杂草群落进行了调查,测定了隶属8科19属的20种杂草的重要值,并用主成分分析的方法,研究了主要杂草种群在群落中的地位。
英文短句/例句
1.Distribution Features of Weeds Communities in Citrus Orchard of Southwest Zhejiang Province浙西南柑橘园杂草种群分布特点研究
2.Comparative Study on Characteristics of Water Physiological Ecology of the Main Turf-weed Populations;草坪主要杂草种群水分生理生态学特征的比较研究
3.Studies on Weed Population Dynamic and Chemical Controlling Techniques in Citrus Orchard at Southwest Zhejiang Hilly Region;浙西南丘陵地柑桔园杂草种群消长动态及化学防治技术研究
4.Effect of ecologically-based weed management strategies on weed community and diversity in hilly tea plantations两种生态控草措施对丘陵茶园杂草群落及物种多样性的影响
5.Seed Production Characteristics of an Exotic Weed Mikania micrantha外来杂草薇甘菊在不同群落中的种子生产特征
6.Weed communities and distribution characteristics in the paddy fields of main rice growing regions of Hubei Province湖北省水稻主产区稻田杂草种类及群落特点
7.The Study of Interspecific Relationship and the Characteristics of Weed Community of the Mixed Cropping Annual Artificial Grassland in the up Stream of Shiyang River;石羊河上游一年生人工草地种间关系及杂草群落动态研究
8.A Study on the Genetic Diversity and Differentiation of the Weed Humulus Scandens Populations in Shanghai;上海市杂草葎草种群遗传多样性与遗传分化研究
9.The Investigation and Medicament Prevention of the Advantage Plant of Weed in Turf in Huaibei Area of Anhui Province安徽省淮北地区城市草坪杂草优势种群调查及化学防治
10.Species composition of a Leymus chinensis+forbs community and standing biomass under over-grazed environment过度放牧对羊草杂类草群落种的构成和现存生物量的影响
11.Effects of species richness on weed invasion in an artificial grassland ecosystem in eastern Tibetan Plateau青藏高原东缘人工草地群落物种丰富度对杂草入侵的影响
12.Effect of different planting methods on weed group and weed growth and development in corn field不同种植方式对玉米田杂草群落及生长发育的影响
13.LONG-TERM EFFECTS OF STRAW RETURNING & FERTILIZATION ON COMMUNITY CHARACTERISTICS OF SPRING WEED IN RICE-RAPE SEED CROPPING SYSTEM施肥与秸秆还田对太湖稻-油复种系统春季杂草群落特征的影响
14.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
15.If the brain sows not corn, it plants thistle .脑里不种粮，必定生杂草。
16.Some other herbicides are not effective against as many as seventy kinds of weeds.一些除草剂对70种杂草都没有效力。
17.Study on the Quantity Charcteristics Seasonal Dynamics of Aneurolepidium Chinses + Herbs Community羊草＋杂类草群落数量特征季节动态的研究
18.Study on Ecology of Weed Community in Wheat Fields and Biology Characteristics of Beckmannia Syzigachne;麦田杂草群落生态学与菵草生物学特性的研究
相关短句/例句
hybrid population杂种种群
3)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。
4)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
5)weed seeds杂草种子
1.Species and dynamics of floating weed seeds in paddy field;稻田水面漂浮的杂草种子种类及动态
2.The species and number of weed seeds that dispersed by irrigation water were recorded and counted,the weed communities on the ridge of the paddy field and in surrounding habitats of the ditch were surveyed,and they were compa.选择典型稻作区,对灌溉水流传播的杂草种子的种类和数量进行取样调查,并与田埂、灌溉水渠周围生境、下茬麦田的杂草群落及稻田土壤杂草种子库进行比较分析,以研究自然条件下灌溉水流传播的杂草种子与土壤杂草种子库及其他生境杂草群落间的相互关系。
3.Under the condition of constant temperature at 25±1℃ and 12 hour light/d,the effects of paclobutrazol on germination of 5 dicotyledonous weed seeds in orchard,which are Pharbitis purpurea(L.等5种双子叶果园有害杂草种子萌发的影响。
6)species of weeds杂草种类
1.The results showed that there are 38 species of weeds belonged to 18 families.2002年7月-2003年6月对西宁地区草坪主要杂草种类和危害情况进行了调查。
延伸阅读
种群增长率(见种群出生率)种群增长率(见种群出生率) 种群增长率见种群出生率。
