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科技导报
| 研究论文 2016, 34(18): 125-129
乌兰布和沙漠不同结构防护林带防风效能
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段娜1,2 , 刘芳1 , 徐军1 , 陈海玲1 , 张格1 , 郝玉光1
作者信息
1. 中国林业科学研究院沙漠林业实验中心, 磴口 015200;
通讯作者:
郝玉光(通信作者),研究员,研究方向为荒漠化防治,电子信箱:hyuguang@163.com
On defending effects of different forest belt structures in Ulan Buh Desert
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出版时间: 2016-09-28
doi: 10.3981/j.issn.1000-7857.2016.18.016
文章导航
为对乌兰布和沙漠地区防护林建设提供理论依据，对乌兰布和沙漠几种典型结构和配置的防护林带进行风速观测，结果表明：其防风效益与林带高度、结构、疏透度等因子有关，稀疏型林带防风效果最佳，平均为41.37%，疏透型次之，为29.58%，通风型防风效果最差，为23.92%。林带防风效能较好的疏透度为40%~50%，随着林带总平均疏透度的增加，防风效能显著降低。分层疏透度不同也直接影响防风效果，因此，林带结构应以稀疏型为主，林带总平均疏透度控制在30%~50%，分层疏透度应控制在林冠层30%~50%，林干层50%。
According to observations on wind velocities of different shelterbelts in Ulan Buh Desert, the paper shows that the defending effect varies with forest belt structure, height and porosity. Wind defending effect of sparse structure shelterbelt is the best, which is 41.37%, porous structure takes the second place, 29.58%, and ventilation structure is the worst, 23.92%. Shelterbelt with a porosity of 40%~50% has the best wind defending effect. With the increase of porosity, the defending effect decreases remarkably. So the structure should be sparse with a porosity of 30%~50%, and the porosity of forest canopy should be 30%~50% and the porosity of trunk, 50%.
Ulan Buh Desert
/
defending effect
/
porosity
段娜, 刘芳, 徐军, 陈海玲, 张格, 郝玉光.
乌兰布和沙漠不同结构防护林带防风效能.
科技导报,
2016
, 34
(18)
: 125
-129
.
DOI: 10.3981/j.issn.1000-7857.2016.18.016
DUAN Na, LIU Fang, XU Jun, CHEN Hailing, ZHANG Ge, HAO Yuguang.
On defending effects of different forest belt structures in Ulan Buh Desert[J].
Science & Technology Review ,
2016
, 34
(18)
: 125
-129
.
DOI: 10.3981/j.issn.1000-7857.2016.18.016
2016年第34卷第18期
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文章信息
doi: 10.3981/j.issn.1000-7857.2016.18.016
接收时间：2015-09-17
首发时间：2016-10-21
出版时间：2016-09-28
收稿日期：2015-09-17
修回日期：2016-07-18
通讯作者:
郝玉光(通信作者),研究员,研究方向为荒漠化防治,电子信箱:hyuguang@163.com
https://castjournals.cast.org.cn/joweb/kjdb/CN/10.3981/j.issn.1000-7857.2016.18.016
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2种不同金属材料的力学参数
科 属数 种数 占总种数比例 属 种数 占总种数比例 鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78 小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39 多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39 红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87 小菇属 Mycena 11 5.26 光柄菇属 Pluteus 5 2.39 红菇属 Russula 17 8.13 栓菌属 Trametes 5 2.39
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