查询词典 weed tree

This weed population had a wider niche breadth, the second widest among 12 major weed populations in weed community, and had bigger niche overlap with Stellaria alsine, Alopecurus acquallis, Malachium aquaticum, Poa annua, Polygonum persicaria and Lapsana apogonoides. In rape, wheat or fallow, B.

在杂草群落中，草的生态位宽度居第2位，说明其有潜在的较强的适应环境的能力；草与雀舌草、看麦娘、牛繁缕、早熟禾、春蓼和稻搓菜等杂草种群的生态位重叠较大，与它们的生态要求比较接近。

Using nuclear DNA C-values for 539 angiosperms in China, we examined the variation of these values among growth forms and taxonomic groups and the relationship of these values with invasiveness. Mean DNA C-value of the 539 angiosperm species was 4.06 pg. Mean DNA C-value was(1) significantly lower for woody species (1.84 pg) than for herbaceous species(5.02 pg);(2) significantly lower for 360 dicots (2.20 pg) than for 179 monocots (7.80 pg);(3) significantly lower for annuals (2.78 pg) than for perennials(6.65 pg);(4) significantly lower for 134 weed species (1.93 pg) than for herbaceous non-weeds (6.75 pg) and for several families that have an unusually high proportion of weed species;(5) significantly lower for 47 exotic weed species (1.76 pg) than for 134 native weeds (1.93 pg), but significantly lower than that of "non-weedy" herbaceous species (6.75 pg);(6) lower for weeds than for "non-weedy" species in same genus or family; and (7) in herbaceous species, generally lower for weedy compared to "non-weedy" species, with some exceptions such as Avena fatua, whose DNA C-value is as high as 14.15 pg, contrarily, and some "non-weedy" herbaceous species in Cruciferae and Cucurbitaceae with very low values.

统计了中国境内有分布的539种被子植物的DNA C-值，分析了它们在不同分类群、生活型、倍性、生活史类型以及在杂草和非杂草类群中的分布情况，主要结果如下：(1)539种被子植物DNA C-值平均为4.06 pg，其中木本植物的DNA C-值平均为1.84 pg，低于草本植物的平均值(5.02 pg)；(2)双子叶植物(360种)的DNA C-值平均为2.20 pg，极明显地小于单子叶植物(179种)的平均值(7.80 pg)；(3)1年生植物的DNA C-值平均为2.78 pg，明显小于多年植物的平均DNA C-值(6.65 pg)；(4)134种杂草的DNA C-值平均为1.93 pg，明显小于非杂草草本植物的平均值(6.75 pg)，含杂草较多的科，平均DNA C-值相对较小；(5)统计的47种入侵杂草的DNA C-值平均为1.76 pg，略小于134种杂草的平均DNA C-值(1.93 pg)，极显著地小于非杂草性草本植物(6.75 pg)；(6)以科为单位，不同科的DNA C-值存在着极大的差异；(7)DNA C-值与染色体倍性的关系并不明显，但是，随着倍性的增加，基因组变小；(8)在同一科、属中，与非杂草相比，典型杂草的DNA C-值往往偏小；(9)总体上杂草或杂草性强的植物，它们的DNA C-值比非杂草性植物的要小。

Variation of important value of dominant weed is that in spring and fall the dominant weed is Viola prionantha while in summer it is Digitaria ischaemum. In general management lawn community it is Leymus secalinus that is the dominant weed in spring and fall and Digitaria ischaemum in summer.

管理水平较差的草坪群落中，春季和秋季是早开堇菜占优势，夏季是止血马唐占优势；管理水平一般的草坪群落中春、秋季节是赖草占优势，夏季也是止血马唐占优势；管理水平较好的草坪群落中整个生长季是鼠掌老鹳草、鹅绒委陵菜、赖草占优势，且以鼠掌老鹳草的优势度最大。

When the mevinphos was utilized for a long time in highland barley field, the young-root of next-season cole shortened 1.9~2.0cm and fresh weight decreased 0.13~0.14g per individual plant compared with the control. Low-tillage in time after autumn-harvest showed that the weed seeds in the ground surface were harrowed into the tilth of 0~10cm. Early-low-tillage in spring-sow of the next year induced weed seeds of soil surface to germinate and come out ahead. After 10 days, tillage-sow can decrease about 40% weeds. Compared to the normal plough-row, direct late-tillage-row was postponed 10 days, and can decrease about 30% weeds. In the seedling period or later, rudimental weed seeds were handled with a hoe, which led to better cure and control effects and had more benefits to the young seedling growth and yield of the next-season crop.

研究结果表明：氟乐灵在油菜田长期使用时，土壤残留农药抑制下茬青稞幼根生长，幼根较对照株缩短3.0~3.1cm/株，鲜重量减少0.19~0.20g/株；甲磺隆在青稞田长期使用时，下茬油菜幼根较对照株缩短1.9~2.0cm/株，鲜重量减少0.13~0.14g/株；秋收后及时浅耕可将落入地表的杂草种子全耙入0~10cm耕层内；翌年春播早浅耕可诱发土壤表层的杂草种子提前萌发出苗，10d后耕种，能防除40%左右的杂草株数；较正常播种期推迟10d后直接晚耕播种，可防除30%左右杂草株数；苗期或后期拔出残余杂草种子时，除草效果理想，对下茬作物幼苗生长发育及产量无任何不良影响。

As one kind of the extensive weed killer, Glyphosate is one of the biggest global output agricultural chemical original drug weed killer. It occupies the entire weed killer market 30 % and the first world pesticide sales in continuously many years.

中文摘要嘉磷塞是目前全球产量与使用量最大之杀草剂农药，嘉磷塞作为一种广谱灭生性杀草剂，占整个杀草剂市场总量的30%，连续多年占据世界农药销售额首位。

In the fangshan nursery of zhonglin company, Beijing ,on the basis of poplar tree vessel seedling 's weeding experiment with 11 weed killers in the greenhouse , the effects of 12 weed killers on seven broad-leaf tree seedlings were separately carried on by the way of soil treatment and leaf treatmen in the field . The research results indicated that 24% oxyfluorfen EC treated soil surface with quantity of 40-80ml each 667m2,the weeding effect can reache above 95%; 10% imazaquin AS with quantity of 15-25 ml each 667m2, and 30% benazolin-ethyl EC with quantity of 56-76 ml each 667 m2 were sprayed on the weeds or leaves of the seedlings, the weeding effects can reach above 81% and 85% respectively, but safe to nursery stock growth .

在北京中林公司房山苗圃基地，用11种除草剂配方在塑料大棚杨树容器苗试验的基础上，对大田七个阔叶树种苗圃用12种除草剂配方分别进行土壤处理和茎叶处理，结果表明，用24%惠尔乳油，每667m2用商品量40-80ml作土壤处理，除草效果达95%以上；用10%咪唑喹啉酸水剂和30%草除灵乳油每667m2用商品量分别为15-25ml和56-76ml作茎叶处理，除草效果分别达81%和85%以上，对苗木生长安全。

Tree and you to can't separate, tree can lack you, you could come and plant I this head already ruined death tree that has died soon only, I will fire the hope of growing again because of you,Water and earth forge tree , could let tree survive you, I the tree survive at only have youing, without you, my life is written in water, will you of today come?

树与你是不可分离，树不能缺少了你，只有你才能来栽种我这棵已快颓逝的死树，我会因为你而重燃生长的希望，水和大地锻造了树，却是你才能让树生存，我这棵树就只有拥有你时才能生存，没有了你，我的生命则为转瞬即逝，今天的你会来吗？

After nest found, the dominating ecological factors with definite distance to nest tree (less than 10 meters) including tree species, tree height, habitat type of nesting-tree, nest position, the type of nesting tree branch, nest type, the type of nest-site, the viability status of tree and branch was described and measured. Geography coordinates (latitude-longitude) was converted into orthogonal coordinates, and add to Arcview3.2 as shape-file, and measured the distance between nest and the habitat type including double-line river, lake, seasonal lake, shallow mire, deep water mire, meadow mire, farmland, sparse forest, forest marsh, the boundary of Nature Reserve and road.

将调查所获得的东方白鹳巢址坐标转换成平面直角坐标，并将巢位点作为Arcview3.2中的矢量图层加入到已经矢量化的洪河保护区生境类型图中，运用Arcview3.2的距离量算功能，量算出每个巢距各生境类型的距离，包括双线河、湖泊、时令湖、轻沼泽、重沼泽、沼泽化草甸、旱田、疏林和森林沼泽，以及距保护区边界和公路的距离。

And so tree peony is the main economic support of the product area of tree peony .All of this need a systemic and scientific cognition of the rules of grow and development of tree peony. But as the study on the physiological and biochemical changes during the period of forming strong buds of tree peony is concerned, the level is very low and still use the traditional methods of cultivation and management . So if we want to get the quality flowers ,we should have quality buds and we should use all methods ,if we can , to meet the conditions that tree peony needs. And so it is very important for theory and practice to study the physiological and biochemical changes during the period of forming strong buds of tree peony.

但是，不论是生产商品苗木还是用于反季节催花，都需要对牡丹的生长发育规律有一个系统和科学的认识，然而，目前的牡丹栽培仍然衍用传统的栽培技术，对牡丹生长发育过程中的生理生化变化规律的认识，却还停留在比较肤浅的水平和层次上，因此要得到高质量的牡丹花，就要有高质量的牡丹芽，就必须按照牡丹的生长发育规律，建立科学的栽培技术体系，在牡丹壮芽形成过程中运用一切可以运用的栽培措施、管理技术来满足条件，因此，对牡丹壮芽形成过程中的生理生化变化的研究就具有十分重要的理论和实践意义。

Apple tree canker also called rotten skin disease ,which is one of main diseases of fruit tree plant in north, and its harm is extremely serious. Moreover, the scope is widespread and it exists from the sapling to the senile tree in different degree. Apple tree canker is the main reason of the dead shoot, the dead tree and destroying the garden ,which also blocked the development of the north of fruit tree seriously.

果树腐烂病俗称烂皮病，是北方果树主要病害之一，危害十分严重，而且范围广泛，从幼树到衰老树均有不同程度的发生，是造成苹果树死枝、死树、毁园的主要原因，也严重地阻碍了北方果树的发展。

His female bullfighter Lydia gradually Health love, but she was in a vegetative state after the Bulls Zhuangcheng away from her, just because Lydia's ex-boyfriend showed more affectionate than he is like love.

他对女斗牛士莉迪亚渐生爱意，却在她被公牛撞成植物人后离她而去，仅仅因为莉迪亚的前男友表现出好似比他更深情的爱。

I know of none which are not easy to answer, but what I am trying to do now is only by a series of hints to throw some light on the narrow path of legal doctrine, and upon two pitfalls which, as it seems to me, lie perilously near to it.

我不认为有什么难以回答的问题，但我现在要做的仅仅是通过一系列线索，来给法律理论的狭窄路径以及在我看来离它近得危险的两个陷阱提供一些启示。