The Protection Forestry(Phase 4)for the Landfill of the Old Port Areas in Shanghai;
上海老港城市固体废弃物填埋场四期景观绿化防护林建设工程
Advance of spatial allocation for protection forest;
防护林空间配置研究进展
Studies on Soil Amelioration of the Protection Forests In the Hilly Areas of central Sichuan;
川中丘陵区防护林改良土壤作用研究
Theories and technologies of ecologically regulating poplar longhorned beetle disaster in shelter forest.;
防护林杨树天牛灾害的生态调控理论与技术
Study on Structure and Growth of Shelter Forest in Maowusu Sand;
毛乌素沙地防护林结构与生长的研究
Research on the Benefit of Shelter Forest Protection in Yulin Desert Region
榆林沙区农田防护林防护效益研究
Study on water conservation function of protective forest in watershed of farming-pastoral zone
农牧交错带小流域防护林水源涵养功能研究
By using methods of plant genecology,the inter specific association among 12 dominant populations and the interspecific abundance covariation among 8 dominant populations,from the protective forest of needle broadleaved mixed type lied in Guanshi River Valley of Mianyang area,in the center of Sichuan Province were studied quantitatively.
应用植物种群生态学研究的有关方法，对四川中部绵阳地区官司河流域针阔叶混交型防护林的１２个优势种群间的联结性和８个主要建群间的多度协变关系进行了定量研究，以探索群落内各种群间的联系状况，从而为本区长江防护林营建中的林种配置提供一定的理论依据和参考。
The data of two years showed that fore-protective forest of oasis-desert played an important role in decreasing wind velocity.
沿绿洲至荒漠戈壁和绿洲至流动沙丘的防护林体系分别选择一条观测样线 ,每条样线分不同防护区布设 4个观测点同步观测风速和输沙率。
Evaluation of landscape ecology of shelterbelt system of Beizang Town, Daxing County, Beijing;
京郊北藏乡防护林景观生态评价
The Positioning Study on the Microclimate Effects of Casuarina equisetifolia Coastal Shelterbelts;
木麻黄沿海防护林小气候效应的定位研究初报
Technology of Establishing Shelterbelts for Dikes and Dams in Heilongjiang Reclamation Area;
黑龙江垦区江河堤坝防护林营造技术
Biomass and productivity of Casuarina equisetifolia shelter belt along the coastal sandy land were studied.
对海岸沙地木麻黄防护林带生物量和生产力的研究结果表明:13年生木麻黄林带的生物量为100。
In order to provide some theoretic basis for similar areas,soil physiochemical properties in shelter belt of Jining-Erlinhot railroad line were studied by using classical statistics.
应用经典统计学方法,对集宁-二连浩特铁路沿线防护林土壤理化特性进行了研究。
In order to study the mechanisms of windbreak,sand-fixation and protection benefits in shelter belts,wind erosion under three types of protective forest model was simulated in a wind tunnel experiment using the PIV system.
农田土壤风蚀沙化是北方农牧交错区农业生产发展的主要限制因子,为了研究防护林带防沙机理和防护效益,利用PI V(particle image veloci metry)系统,在风洞中对陕北靖边县3种不同的防护林模式进行了模拟实验研究。
A comprehensive protection and control of Anoplophora nobilis in shelter-forest in Guyuan;
固原北川防护林黄斑星天牛的综合防治
Reducing Soil Salinity of Shelter-forest in Silting Coastal Area;
淤泥质海岸防护林的降盐改土功能
We measured the forestation trees of shelter-forest in different ages on Talimu desert highway,including height,canopy,base diameter and tiller numbers.
2005年测定了塔里木沙漠公路防护林塔中段不同年龄防护林造林树种的树高、冠幅、基径及分蘖数,依据不同年龄的防护林植物的形态指标建立其生长方程。
The shelterbelt kept the sand in check.
防护林带挡住了风沙。
We will carry forward projects to restore cultivated land to forests, to protect natural forests, to build the northwest-north-northeast China networks of shelterbelts, and to prevent and control desertification.
继续实施退耕还林、天然林保护、三北"防护林和防沙治沙工程。
The shelter belt halted the soil erosion.
防护林带防止了水土流失。
Windbreaks stop the wind from blowing soil away.
防护林的作用就是防止风把土壤吹走。
They also keep the wind from destroying or damaging crops.
防护林还能够保护庄稼不被风破坏。
Effects of Populous popular's Farmland Shelterbelts on Reducing Wind in Hetao irrigated Region
河套灌区两种营林方式防护林的防风效益研究
among the protection forests and forests with special uses, the national defense forest, the parent stand, the environmental protection forest and the scenic beauty forest can only permit cutting for cultivation and reforestation purposes;
防护林和特种用途林中的国防林、母树林、环境保护林、风景林,只准进行抚育和更新性质的采伐;
Protective effects of farmland shelterbelts in Northeast China:A field scale analysis
基于田间尺度的东北农田防护林防护效应分析
Study on Benefits of Two Kinds of Poplars and Distance of Farmland Protective Forest in the Hetao Area
河套灌区两类农田防护林防护效益对比研究
Rules of Wind Prevention and Sand Resistance and Defensive Efficiency of Oasis Farmland Shelterbelt in Wulanbuhe Desert
乌兰布和沙漠绿洲农田防护林防风阻沙规律及防护效益
Study on Regeneration cutting Age of Shelter belt in Nongan County,Jilin Province
吉林省农安县农田防护林更新采伐年龄的研究
Investigation on Eco economic Benefit of Protection Forest in Rangland in Yulin Sand Zone
榆林风沙区牧场防护林生态经济效益调查
The Planning Study of the Fourth Project for Three-North Forest Shelterbelt in the West of Jilin Province;
吉林省西部‘三北’防护林四期工程规划研究
Studies on the Shelter Forest Hydrology Effect of Mountain Region of Stone Quality and Forest Composition Structure Disposing;
石质山地防护林水文效应及林分结构配置研究
Study on Tree Species Selection and Afforestation Models of Coastal Protection Forest in Beilun District of Ningbo
北仑区沿海防护林树种选择与造林模式研究
Developing forestry carbon sinks to promote the construction of the Three-North Shelter Forest Program
发展林业碳汇推动三北防护林体系建设
Effects of Mixed Trees of Farmland Shelterbelts on Transpiration Rate
农田防护林混交对林木蒸腾速率的影响
Forest canopy interception of different tree species of protection forest in Miyun Reservoir watershed
密云水库集水区防护林不同树种林冠截留研究