1.
Study on the Influence of Two Kinds of Poplars Shelterbelts on the Salt Balance in the Hetao Area
两种杨树防护林对河套灌区盐分均衡影响的研究
2.
The Study on Water Consumption Characteristics of Poplar Sheltbelts System in the Cropland of North China Plain;
华北平原杨树农田防护林系统耗水特征的研究
3.
The Contrast Study on Protect Effect about Two Kinds of Populus Shelterbelts in Hetao Irrigated District;
河套灌区两种杨树农田防护林防护效应的对比研究
4.
Soil microbial biomass and activity in relation to stand age of poplar shelterbelts
不同林龄杨树农田防护林土壤微生物生物量碳、氮和微生物活性
5.
Introduction and selection of new poplar clones in shelterbelts/windbreaks in northern Liaoning.
辽北地区农田防护林杨树新无性系的引进与优选
6.
Theory and Techniques of Ecological Regulation of 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研究
7.
Directs the Yellow Irrigation Ditch Desilting Stack Sand Poplar Tree Planted Shielding Effect Research;
引黄灌渠清淤堆积沙地杨树人工林防护效应研究
8.
Measurement and Evaluation on Ecosystem Services of Populus Ecological Protective Forests in Lowland of the Yellow River
黄河滩地杨树生态防护林生态系统服务的计量及其价值评估
9.
The Occurrence and Control of Diseases and Pests of Poplar Forest in Bazhou City
霸州市杨树片林病虫害的发生与防治
10.
Primary study on controlling on the canker disease of new afforested poplar in northern Jiangsu
苏北杨树新造林地溃疡病防治技术初探
11.
Monitoring and Warning and Safety Protection against Geological Hazards in Yangshuzhuang Tunnel
杨树庄隧道灾害监测预警和安全防护技术
12.
Study on Ecological Benefits of Populus Popular s Farm-shelter Forest in Hetao-irrigated Region;
河套灌区小美旱杨农田防护林生态效益研究
13.
Estimation models of aspen shelter belt evapotrans piration in Tarim River Basin;
塔里木河流域白杨农田防护林蒸散量估算模型
14.
Shelterbelt Species Arrangement and its Optimized Model on Muddy Coast
泥质海岸防护林树种配置与优化模式
15.
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;
16.
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
17.
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
18.
Native Auxiliary Species of Mixed Broadleaf-Korean Pine Stands--Populus ussuriensis Kom.
阔叶红松林的伴生乡土杨树——大青杨