This article is concerned with a summary of the implication , principle , current states and development strategics of developing non - timber product forest crops in constructing the shelterbelt of the changjiang river by investigating the construction of the shelterbelt in the upper and middle peaches of the changjiang river in hunan , huber , jiangxi and anhui province and analysing the soc - economic condition in this areas 通过对湖南、湖北、江西、安徽等省长防林建设的实地考察，结合对当地自然社会经济条件的分析，对长防林建设过程中发展经济林的意义、应遵循的原则、存在的问题及发展策略进行了全面的分析。
In typical watershed , quxi watershed , the result of external forcing , submerge and migrant , is the resource change of slope cultivated lands , economical forest , vegetation , water , habitant etc . of the ecosystem , and the changes of demand for food supplies , energy resource and education 移民区典型小流域? ?曲溪小流域，受淹没、移民2个驱动力的作用，耕地、经济林、植被、水、栖息地等资源发生了显著变化，系统的粮食、能源、教育需求也随之而变，在内在反馈机制的作用下，导致系统输出为水土流失加剧、生物多样性受到破坏、土地退化严重等。
A series of construction techniques for prunus padus were obtained in terms of seedling cultivation and establishment of forests for both medicinal purpose and ornamental purpose , which can provide a theoretical basis for qualified seedling cultivation , rare species protection and propagation as well as sustainable utilization of resources 摘要通过对稠李育苗技术、药用林及绿化美化林营建技术的研究，总结出一套稠李育苗、双向经济林营建技术，为培育优质壮苗，保护和扩繁珍稀物种，实现资源可持续利用提供理论依据。
Regulation of forestry structure emphasizes on forestry protection for environment , with selecting suitable tree seedling and grass seeds , and forming views of plant community to avoid single species of tree seedling and grass seeds . forestry protection for environment should not be below 60 % , and economic forestry no more than 20 % 林业结构调整要坚持的生态防护林为主，不低于60 ，控制经济林不高于20 ，要选择适地树种和草种，还林还草要树立植物群落思想，避免林、草品种单一化种植模式。
The thesis is based on income question , forest coverage rate and grop production . to beging with , date envelopment analysis is proved that it can be applicated into grain for green in shan - bei district , and then in view of the fact , seven esential factors which have influence on the project are found out : expense of dam , expense of crop , expense of cash tree , expense of defense tree , other economic crop , expense of grass and graziery ; and the output factors include : income of gdp , pure income per captia , the area of decreasing land loss , graziery income , crop production , income of tree , the totle income of economic crop . after the date of each facts are puted into dea model , unefficiencial decision making units ( dmu ) found . the data that are got through adjusting unefficiencial dmus dy dea can offer guide in shanbei district upgrading of an industrial structure . at the same time , taking into account some possible problems in or after grain for green in shan - bei district , the thesis bring out some propesal to improve the circ umstance , enhance the life level and put the relation of population , resource and circumstance into a healthy orbit 因此，加快退耕还林还草，调整土地利用结构和产业结构，已成为实现山川秀美工程和可持续发展战略的必经之路。论文以解决陕北地区的收入问题，植被问题以及粮食产量问题为出发点，首先从理论上分析了包络分析方法在陕北地区退耕还林(草)中运用的可行性，然后结合陕北地区目前的实际情况，综合分析出影响陕北地区退耕还林(草)的关键的七个因素作为输入指标：水利水保设施投入，农作物投入，经济林种支出，防护林支出，其它经济作物，草类支出，畜牧业投入；以退耕还林所要解决的最终问题作为输出指标： gdp收入、农民人均纯收入、水土流失减少量、牧业总产值、粮食产量、林业总产值、其他经济作物总产值。将各指标所对应的数据代入模型后，通过分析求解得出非有效的决策单元，再运用包络分析方法的一些基本原理对非有效的决策单元进行调整，由此所得的数据对陕北地区的实际投入具有很好的指导意义。
The second part give an all - around demonstration on eco - economic backgrounds of hilly gullied loess region and concluded that small watersheds are dominant landscape units that enable them to be basic for regional management and development . ecological and economic strategies for regional development are also put forward : soil and water conservation to improve ecological environment should be first - line task the region shoulders in the new century . " grain for green " policy provides chances of accelerating development for the region 第二部分综合阐述了黄土高原丘陵沟壑区的生态经济背景，指出：小流域为黄土丘陵沟壑区的优势景观单元，是区域治理与发展的基本单元：并提出区域治理与开发的生态与生产定位：区域应以水土保持、改善生态环境为新世纪的主要战略任务，国家的退耕还林草政策为区域加大环境治理提供了新的契机；在生态环境明显改善的基础上实现粮食自给，实行农牧结合，重点发展畜牧业，有选择的发展经济林果业。
The major strategies for developing non - timber product forest crops during constructing the shelterbelt of the changjiang river are to transform non - timber in the serious water and soil erosion areas , to plan the development scales of non - timber forest in the areas of returning farm to forest , to adjust non - wood products distribution , to establish high productive production bases of non - wood products and to strengthen the macroscopic guide of government for developing non - timeber forest 对水土流失严重的经济林分布区进行技术改造、做好退耕还林地上发展经济林的规划、适当调整经济林生产布局、建立高效经济林生产基地、强化政府的宏观指导是在长防林建设过程中发展经济林的主要对策。
First , according to the heterogeneity of landscape in zherong , the author selected the dominant elements such as topography , altitude and climate which reflect the large scale of area differences and the stastistical materials which have long - reaching effects on the county . the county was divided into 8 landscape types : resident and trade area , industry area , traffic land , farmland , garden and greening land , water area , forestry area , unclaimed land . the types have 21 subtypes , the city area , county area , heavily polluted industry area , little maching area , road land , country road land , cultivated land . mushroom land . taizishen land , tea land , man - made greening land , garden land , reservoir area , river and creek area . defending forestry area , forbid - cut forestry area , bamboo area , economical forestry area , unclaimed mountain , unclaimed land , unclaimed water 同时，根据该县景观异质性强的特点，以行政区划单位、人为干扰强度、景观要素和功能流为柘荣县城市景观分类的原则和依据，选择地貌、海拔、气候等反映区域分异的主导因子和对该县社会经济影响深远的统计资料，将全县划分为8个景观类型，即居住区和商业区景观、工业区景观、交通用地景观、农田景观、公园绿地景观、水体景观、林区景观、未开发地景观。景观类型下又划分21景观亚类型，分别为城区景观、村落聚居地景观、重污染工业景观、小加工业景观、公路景观、乡村道路景观、耕地景观、食用菌景观、太子参景观、茶园景观、人造绿地景观、公园景观、水库景观、溪河景观、防护林景观、封山育林区景观、竹林景观、经济林景观、荒山景观、荒水景观、荒地景观等景观亚类型。
In the past ten more years , the county government has actively developed the chinese traditional medicinal plants , edible fungi , tea , alpine vegetables , forests , special animal production and so on . as a result , the farmers " income considerably increased , the small towns construction was promoted , and the differences between the urban and rural areas were reduced 在过去的十多年里，该县大力发展中药材、食用菌、茶叶、高山蔬菜、经济林、特色养殖等农业产业，特别是中药材和食用菌生产、流通，使得农民收入有了显著的提高，小城镇建设步伐不断加快，城乡差别显著缩小。
The research results reveal that the total value of soil conservation in yuanzhou district adds up to about 8634 . 39 million yuan ( rmb ) per annum , of which , about 8148 . 62 million yuan is of holding nutrient for n , p , and k , about 19 . 43 million yuan of decreasing soil loss , and about 466 . 35 million yuan of reducing reservoir silt different types of vegetation produce different environment benefits 原州区退耕还林还草植被发挥效益后，每年保持土壤的总价值为8634 . 39万元，其中减少养分损失价值为8148 . 62万元，减少土地废弃价值为19 . 43万元，减轻泥沙淤积价值为466 . 34万元；各种退耕类型的土壤保持功能大小依次为：还乔木林、还灌木林、还人工苜蓿草地、还经济林。
