旱

The weeds community in the dry direct seeding paddy field is compound made of both water plants and xeromorph plants which have two fastigiums.

水稻旱直播栽培是近几十年发展形成的一种轻型水稻种植方式，具有省工、投资少、节水抗灾能力强[1，2]等优点。

First of all,we tested the germination and water uptake rate of 47 species typical xerophil seeds grow up in north China from 20 families,38 genuses under sufficient water and different Grads water stress by high-molecular-weight polyethylene glycol(PEG6000).The results show that Xerophil seeds from the same habitat exhibited similar patterns in response to water stress.Xerophil seeds from arid community were stronger in germination and imbibition than that from other two communities under serious water stress,whereas Xerophil seeds from humid community were sensitive to any degree of water stress.Namely,the seeds live in arid habitat possessed high germination and quickly water uptake in sufficient water or any degree of water stress,but the others grow up in humid habitat shown significant difference which germination and water uptake well under sufficient water but inhibited even if slight water stress.

首先，我们通过对20个科，38属，47种旱生植物种子在水分充足和不同梯度的干旱处理(聚乙二醇PEG6000)条件下的萌发率及吸水率实验发现，当水分胁迫强烈时，分布于干旱沙漠地区的植物种子其吸水率和萌发率都高于半干旱和湿润地区的植物群落，相反，湿润地区植物种子的吸水率和萌发率对任何的水分胁迫都表现出敏感的响应趋势，也就是说，生境恶劣的植物种子在较强的干旱胁迫下，仍然保持了较高较快的萌发率及吸水率，水分充足与水分缺乏时无显著差异，而生境相对较好的植物种子在水分充足情况下萌发与吸水良好，但在干旱胁迫时则受到明显抑制，水分充足与水分缺乏时差异显著。

Some native shade-tolerant or hygrophilous plants had disappeared, while some xerophilous, disturbance-resistant species, as well as some exotic and synanthropic species, had expanded their populations.

结果表明：(1)旅游干扰显著改变了林下植物物种组成：耐荫喜湿的乡土植物局部消失，而喜旱耐扰动的植物种群扩大，外来和伴人植物种群侵入。

The variation of stomata numbers,epidermis thickness and stomata chamber were investigated among the tested provenances;the provenances from Miyun of Beijing and Fugu of Shaanxi Province were more xerophilous.

种源间在鳞叶下表面气孔密度、表皮厚度和孔下室深度等方面有显著差异，属北方种源的北京密云和陕西府谷的鳞叶旱性结构特点更为突出。

In the difference stage of its live cycle,he habitat of the xerophilous plant exist dissimilarities in water factor, Studing the phenomenon of the dissimilar habitat in its live cycle, the diversity of the relation of xerophytes and its environment will be understanded.

我国干旱区一些耐旱乔灌树种，其成株适应干旱能力极强，但其种子萌发及幼体阶段即需地表湿润或短期积水才能完成定居和建群过程，在其生活周期的不同阶段，以水条件为特征的生境呈现明显的异质性。

A xerophyte is a plant which is able to survive in an ecosystem with little available water or moisture.

旱生植物可以在水分极少或湿度极小的生态环境中生存。

Analysis on water retention of 8 xerophyte shrubs including Ceratoides spp.

驼绒藜等8种耐旱灌木持水力分析。

These suggested that Armeniaca mandshuria belonged to thin-leaf xerophyte.

并认为东北杏属薄叶型旱生植物。

The sandy desertified lands have the tropical coastal dene c haracteristics in the district, the shape, the xerophyte and the rapid evolvemen t of land use.

海南岛西部沙漠化土地具有热带海岸沙地的地域特征、形态特征、旱生植被景观特征和土地利用快速演变特征。

The characteristics of ecological type and life form of plants in Artemisia ordosica community are the higher proportion of hemicryptophyte and vivacious herbage and the important role of xerophyte and psammophyte in the communities.

油蒿群落植物的生态-生活型特征明显，如地面芽植物最多；多年生草本植物所占的比重最大；旱生植物占重要地位：沙生植物占优势等。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。