The authors investigated thoroughly the fixed - sand method of biological net of artemisia and analyzed fixed - sand principle of it and aimed at providing theoretical basis and technological support for moving - sand harnessing and ecological restoration in desert area of liaoning northwest 深入研究了差巴嘎蒿生物网方格固沙的方法，分析了生物网方格固沙的原理，为辽西北沙漠化地区流动沙丘的治理与生态修复提供了新的理论依据与技术支持。
In a wind - eroded region , such measures as exploitation of water resources , water diversion for sand removal , planting of trees and growing of grass , installation of artificial sand - break and forest network shall be adopted to build a protective system for windbreak and sand - fixation , thereby controlling hazards of sand storms 在风力侵蚀地区，应当采取开发水源、引水拉沙、植树种草、设置人工沙障和网格林带等措施，建立防风固沙防护体系，控制风沙危害。
Based on the above conclusions about anti - erosive vegetation structure , the paper expounds the implication of anti - erosive vegetation by pointing out the fault of its current definitions , and it is considered that anti - erosive vegetation should aim at protecting soil from erosion and fixing active sands in the eroded areas , ground space fully occupied by plants , in general with close structure , especially with outstanding coverage close to ground by organic matter ( litter and / or biomass ) 在上述结论的基础上，本文通过指出现有防蚀植被定义的缺陷，论述了其涵义，认为防蚀植被应当是在侵蚀地区，以防止土壤侵蚀或以固沙为目的，植物充分占据地面空间，一般具紧密结构，或者显著具有有机体(枯落物以及生物量)贴地面覆盖特征的植被。
The reproductive characteristics and population structure of artemisia ordosica , hedysantm scoparium , caragana korshinskii and the reproductive characteristics of annual plants eragrostis poaeoides and bassia dasyphylla were observed in shapotou artificial revegetation area . stability of the artificial vegetation was appraised from the views of its persistence and variability under local natural condition . the study showed that : the artificial - natural vegetation built with sandbreaks and plants is stable in shapotou area 通过对沙坡头人工固沙植被区主要建植种群柠条( caraganakorshinskii ) 、花棒( hedysarumscoparium )和油蒿( artemisiaordosica )的繁殖特性及种群结构的研究，以及自然侵入的一年生草本植物小画眉草( eragrostispoaeoides )和雾冰藜( bassiadasyphylla )繁殖特性的研究，探讨了在植被的持久性和变异性，分析评价了主要受恶劣环境压力下的人工固沙区植被的稳定性。
The results showed that : the integrated ecological risk was presented symmetrically along brahmaputra , and was mitigated from valley farming area to mountain pastoral area ; the hazards of main risk sources to risk suffer in each sub - region was differently , drought was the common risk source and imperils farming and stock raising severely ; aimed at enhancing the ability of fighting drought , controlling flood and stabilizing sand engineering measures should be taken steps to prevent those hazards ; mountain hazards must be controlled in resident area and along arterial traffic ; manual work should be done to void hail in those area where hails attacked heavily ; there is need to promulgated risk knowledge to herdsmen for strengthening their risk consciousness and improve the ability of preventing risk and self - help after hazards happened in the pasturing area 扎囊县综合生态风险沿雅鲁藏布江呈现对称型分布，并由河谷农业区向高山牧业区逐渐降低；各亚区的主要风险源对风险受体的危害强度差异较大，干旱是共同的风险源，造成的农牧业生产损失最为严重；抗风险措施主要有在河谷地带采取工程措施以提高抗旱、防洪和固沙能力，在半山台地加强治理居民点及交通沿线的山地灾害，在多雹区进行人工消雹；在高寒牧区向牧民传播风险知识，以加强其风险意识，提高规避风险和灾后自救能力。
The structures and dynamic changes of the artifical sand - fixing vegetation were studied based on the follow views : components of vegetation community , plant diversity , life - forms of vegetation , trends of plant growth , characteristics of the vertical and horizontal structure of vegetation , relationship between the vegetation community and environment ( including soil moisture temperature etc . ) , relationship between the vegetation community and characteristics of plant physiological activities . some results were showed as follow : 1 . components , diversity and life style of artificial vegetation in shapotou region the marked changes of artificial vegetation have taken place during more than 40 years , since the establishment of sand - fixing vegetation 本文以腾格里沙漠东南缘宁夏中卫县沙坡头地区人工固沙植被作为研究对象，采用传统生态学的野外调查方法，从植被群落的组成、多样性、生活型、群落生长动态、垂直结构特征、水平结构特征、群落结构与周围环境(土壤含水量、温度)相互关系及其与植物自身生理生态适应特征关系等多个角度研究了人工植被群落的结构及其动态变化，取得了如下研究结果： 1 、植被群落组成、多样性及生活型：沙坡头地区人工植被经过近50年的演变，从流动沙丘到固定沙地，沙地植被的动态变化经历了从人工植被到人工?自然植被的转变，从人工植被建立初期的少数几种引种植物到现有30多种植物，随着固定沙地时间的延长，植物种类日趋丰富，并且人工植被在15 25年、 40 50年两个阶段，物种的周转速率最大，即群落结构变化最大。
In this paper , on the basic theories foundation study of summary people of the past , aiming directly at whether the shelter forest can deposit the sand and how powerful it can . we select the oasis in ulan buh desert as the study plot , and study the function of the shelter forest reduce the " sand " and " dust " . we draw the following conclusion . first , in the fixed and semifixed sand lands , which grow the natural sand - binding plants , the coverage of plant in the fixed and semifixed sand land is 26 . 4 % and 10 . 3 % , respectively , the amount of sand drift decrease 93 . 38 % and 81 . 91 % comparing with the migratory sand land which have no plant coverage in the same wind speed and the range of 0 - 40cm above the ground 本文以前人的研究为基础针对“防护林体系是否有降解作用，有多大的降解作用”这一问题以乌兰布和沙漠边缘的防护林体系为研究对象，研究了防护林体系对“沙” 、 “尘”的降解作用，得出以下结论： ( 1 )在距离地表0 - 40cm范围内，同一风速下生长有天然固沙植物，植被盖度分别为26 . 4 、 10 . 3的固定、半固定沙地上，地表起沙量分别比无植被生长的流动沙地降低了93 . 38 、 81 . 91 。
Abstract : on the basis of the basic principles of ecology , the shrub vegetation in the hexi corridor was classified into eight types , of which distribution , ecological characters , ecological significance and relations with soil were studied , with emphasis on their roles in improving the eco - environment of the hexi corridor , in breaking winds , fixing sands , establishing desert grasslands and controlling desertification in the arid desert system . on such a basis constructive strategies are put forward for rebuilding ecology in desert system and sustainable development of the hexi corridor 文摘:本文从生态学基本原理出发，对河西走廊灌丛植被以群落建群种为基础进行了分类研究，将灌丛植被划分为8个类型，分别对灌丛群落的分布、生物学特性、生态学意义以及各类灌丛植被与土壤之间的关系，特别是对灌丛植被在改善河西走廊生态环境的作用、在干旱荒漠系统的防风固沙、建立荒漠草场以及防治荒漠化等方面进行了研究，并就河西走廊荒漠系统生态重建与可持续发展提出了对策。
Gradually , with the more and more transpiration of the vegetation , and with the reduction of the deep soil moisture , in the end , a kind of balance of soil moisture will appeared and be kept for ever between the precipitation and the transpiration of vegetation , and the manual sand - fixing vegetation will be transformed consequently into its natural climax stage completely , in which the dominant plant is leymus secalimus , and in which the plant species richness is not too low , but the plant species evenness is the lowest 设置机械沙障和生物沙障的初期，植物的物种丰富度、物种均匀度会有一个暂时的提高；但是在人工固沙植被的发育盛期，物种丰富度会降低；随植物群落蒸腾耗水量的不断增大，人工植被不断地衰退，最后发展到赖草土壤顶极群落，此时的物种丰富度并不低，但是物种均匀度很低。
Special seed germination and seedling survival mechanism in artemisia ordosica , eragrostis poaeoides and bassia dasyphylla ensured the maintenance and replacement of their populations in accordance with local environmental conditions . at o ld artificial vegetation of shapotou area , c . korshinskii is expected to disappear in the future of 50 years or so 沙坡头人工固沙区植被随时间推进，老固沙区中的柠条种群将在50年或稍长的时间内消失，形成以油蒿种群为主，花棒种群为辅的多年生群落。
