正确解决这些问题，应是未来水土保持林体系研究的方向。
To solve these problems reasonable will be the researching direction of forest for erosion control in the future.
水土保持林有效覆盖率是水土保持林建设中的一个重要指标。
Effective cover rate for soil and water conservation forests is an important index in the construction of forestry.
本文介绍了万家寨水利枢纽区水土保持林建设所取得的成绩。
In this paper, achievements gained in conservating soil and water conservation plantation in Wanjiazhai hydro junction region have been introduced.
在沂沭河两岸河阶地上，进行了杨树套栽高产值水土保持林杞柳试验。
On the Yishu terrace, the trial of poplars interplanting high-output-value and soil and water conservation Salix interior was conducted.
同时对在半干旱荒漠草地大型项目区水土保持林体系的建设技术做了研究。
The study on construction technology of soil and water conservation forest system in large project district in semi arid desertification grasslands has been done.
研究结果表明，水土保持林要达到一定的年龄才能发挥其最大的水保效益。
The results show that soil and water conservation forest gives its maximal benefit after definite age.
此外还以黄土高原水土流失区为例，介绍了水土保持林有效覆盖率的确定方法。
Finallv the soil and water loss re-gion in Loess Plateau was exampled to introduce the determining method of effective cover rate.
奥地利、前苏联、中国，在水土保持林体系科研方面成绩突出，起到了带头作用。
The researches of the former Soviet Union, Austria and China have obtained more achievements, and have played a leading role in the world.
合理的水土保持林空间配置是黄土高原植被恢复和水土保持功能持续提高的关键。
Disposition of soil and water conservation forest is a crucial problem to accelerate the recovery of vegetation and enhance soil and water conservation efficiency on the Loess Plateau.
水土保持林作为保持水土、防止土壤侵蚀的特有林种，对于提高土壤肥力具有重要作用。
Water and soil conservation forest that is a special forest to prevent soil erosion plays a very important role in improving soil fertility.
但由于存在着物种选择、模式配置和林分结构不合理，导致大多数经济林水土保持效果较差。
However, the species choosing, mode disposition and the unreasonable forestry structure has resulted in the bad effect of water and soil conservation.
生态环境林、城市防护林建设，天然林资源保护，水土保持，林业苗木生产及综合利用开发等。
Construction of ecological environment forest, urban protection forest, water and soil conservation, production and comprehensive utility and development of nursery stock.
文章阐述了水源涵养林对水土保持、涵养和净化水资源等的效能；
The paper summarized the main benefits of water conservation forest such as soil and water conservation, water purification.
因此，从长远的角度考虑，桉树作水土保持主要树种，须以混交林方式营造。
So, if the eucalyptus is chosen as a strong species for soil conservation, it should be in form of mixed woods...
杉木林、未成林、马尾松林水土保持功能中等划分为第三类。
The young forest, fir and pinetum were made up of the third kind.
杉木林、未成林、马尾松林水土保持功能中等划分为第三类。
The young forest, fir and pinetum were made up of the third kind.
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