| 1. | Afforest technology on highyield type shelter forest of poplar tree in tongliao area
通辽地区丰产型杨树农田防护林营造技术 |
| 2. | Study on protective effects of small network farm - shelter forest in sandy area of yellow river
黄泛沙地小网格农田防护林网防护效应的研究 |
| 3. | 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 |
| 4. | The sustainable use o f r esource plants , the quality of shelter forests and the ecological equilibrium ar e key problems in the environment construction in the yangtze basin
长江流域生态环境建设中必须注意资源植物的持续利用、防护林的质量和生态平衡问题。 |
| 5. | The df of production greenland is small ; the df of shelter forest is large , indicating that production greenland has simplest perimeter pattern , while shelter forest most complex perimeter pattern . 4
生产性绿地的分维数最小，防护绿地的分维数最大，接近于1 . 5 ，说明生产性绿地的边界格局最简单，防护绿地的边界格局最复杂。 |
| 6. | Finally , this paper makes an appraise and policy recommendations to the great projects such as shift grain for forest and green project , shelter forest of three northern areas of china project , and beijing , tianjin sand source cure project , etc
最后本文对我国退化土地治理比较大的工程项目：退耕还林还草工程、三北防护林工程、和京、津风沙源治理工程等作出评价和政策建议。 |
| 7. | After analysis of tm / etm + data ' s advantage over the forest change detection , tasseled cap transformation , principal component analysis and normalized difference vegetation index were chosen to enhance the vegetation spectral information . expert classification system was adopted to extract the main tree species in the littoral shelter forest
在分析etm +数据在森林资源监测中的优势的基础上，通过缨帽变换、主成分分析和植被指数法增强植被光谱信息，结合专家分类系统对沿海防护林主要树种进行提取。 |
| 8. | This text has probed into the basic principle that southern hills and land consolidation are put in order from the visual angle of egional sustainable development , four major projects while have analysed on this foundation southern hills and regional land are put in order ( land consoledation , road engineering , is it arrange project , shelter forest project to irritate ) some special project measure that should take , combining red china project district of an county of hubei will carry on real example analysis to the project measure benefit
摘要从区域可持续发展的视角，探讨了南方丘陵地区土地整理的基本原则，在此基础上分析了南方丘陵地区土地整理过程中四大主要工程（土地平整、道路工程、灌排工程、防护林工程）应采取的一些特殊工程措施，并结合湖北省红安县红华项目区对工程措施效益进行实证分析。 |
| 9. | 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 。 |
| 10. | Article 25 people ' s governments at various levels and agricultural production and operation organizations shall map out plans and take measures to organize the construction of irrigation and water conservancy works and shelter forests so as to ensure the steady expansion of farmland with stable yields despite of drought or waterlogging
第二十五条各级人民政府和农业生产经营组织应当制定规划，采取措施，组织农田水利和防护林的建设，保证旱涝保收农田面积的稳定增长。 |
