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- Study on Management Technology of Secondary Forest of White Birch in Daqingshan Mt. 大青山白桦次生林经营技术研究。
- Abstract： In this paper, the feature of birch (Betula platyphylla) secondary forest was analysed including succession analysis, died-tree analysis and management analysis by measuring plots. 通过白桦林样地调查，对白桦林进行了径级分析、死亡木分析和经营分析。
- Habitat and Ecology: On moist places in secondary forests of mountain ridge. 生境与生态：生于山顶次生林中潮湿的处。
- Cut over forest Secondary forest that has already been logged but regrown. 砍伐过的森林,再生林已砍伐过,但又再生的次级森林。
- In the improved secondary forests, the zokor density enlarged gradually, and decreased with the raise of shade density gradually. 次生林改造后林地鼢鼠密度逐渐增大，达到最高以后随着林分郁被度的加大，鼢鼠密度逐渐降低。
- The yield difference between ravine rainforest and secondary forest was not significant. 沟谷雨林和次生林下阳春砂仁果实产量差异不显著.
- Habitat and Ecology: In secondary forest of mountains. Flowering: Mar.-Apr.; fruiting: Aug.-Oct. 生境与生态：生于山地次生林中。花期：3-4月；果期：8-10月。
- Wandering in the primeval secondary forests around Jin Guan Lake, you will be among the towering trees and interweaving vines with the birds singing and cicadas chanting for you. 徘徊在金光湖原始次生林中，但见古木参天、藤萝交织，细听群鸟啭啁、竹影鸣啴。
- The relationship between the zokor occurrence and canopy density was studied in 5 different types of 11-year-old improved secondary forests ny regular sample plot survey. 摘要通过对次改林地11年的鼢鼠发生和林分郁闭度关系研究发现，鼢鼠密度上升期，鼢鼠密度、雌雄比与郁闭度呈递增关系，成亚比与郁闭度呈递减关系；
- Regeneration in relation to logging gaps sizes and ages was investigated in Populus davidiana-Betula platyphylla secondary forests in Changbai Mountain. 摘要从林隙大小和林隙年龄2个方面初步研究了杨桦次生林经营采伐形成的林隙及其更新特征。
- Characteristic analysis on different thermal active surfaces in canopy gap of tropical secondary forest. 热带次生林林窗不同热力作用面特征分析。
- The two systems of government are polar opposites. 这两种政体正好相反。
- The minimums of similarity coefficient were between the natural secondary forest and the rests. 封山育林区和天然次生林区物种丰富度指数高于其他样地。
- Part of the area which is not under cultivation may have the appearance of a secondary forest. 林地中尚未耕作的部分看上去如同次生林。
- The change of this DOC concentration with soil depth was greater under the natural secondary forest or plantation than cropland or rangeland. 这些doc浓度与土壤湿度及凋落物层碳贮量正相关显著。
- This paper reports the study of APMP using mixed hardwood, which grows in the secondary forest in Liaoning eastern mountain area. 对辽宁东部山区次生林中的混合硬杂木 ,利用APMP制浆方法进行了研究。
- Luxuriant forests covered the hills. 山上长满茂密的树林。
- Most insect do not live in polar region. 大多数的昆虫不在极地地区生存。
- Gebang River,20km in length, is located in the secondary forest belt of virgin forest,it has a reputation of "Jiuzhaigou of Guizhou". 蛤蚌河全长20余公里，为原始森林次生林带，有“贵州九寨沟”之誉。
- Alder trees belong to the birch family. 赤杨属于桦木科。
