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- artificial forest regeneration 森林人工更新
- Silvan area culmination of Italy like that forest occupy 79% , artificial forest occupy 2.. 意大利的森林面积中天然林占79%25;人工林占2.
- Study on the initial planting density and its adjustment of Pinus sylvestris var. Mongolica Litvin. Artificial forest in the sand land. 沙地樟子松人工林初植密度及其调控研究。
- Insect (Lepidoptera) faunas of artificial forest deprived from farmland have been investigated in the Weibei gully test region of the Losee Plateau. 摘要对黄土高原南部的渭北沟壑区退耕还林还草后的昆虫区系进行了调查研究。
- As yet there is lack of information on the effects of the bamboo density on the biomass and community growth although there have been many reports on forest regeneration driven by bamboo, bamboo regeneration, and bamboo population dynamics. 迄今为止,有关缺苞箭竹的研究报道较多,但均未考虑到自然群落中密度这一重要的生物因子。
- Influence of thinning on soil fertility in artificial forests. 抚育间伐对人工林土壤肥力的影响。
- This paper concerns water situation,soil constitution,PH value,organic matter content and humic composition of chernozem under different artificial forest. 本文对不同人工林下黑土的水分状况、土壤结构、酸碱性、有机质含量及腐殖质组成进行了研究。
- Spatial heterogeneity and forest regeneration 森林更新与空间异质性
- By means of investigating roots reinforcement of Robinia pseudoaca- cia artificial forest cut before years of 2,4 and 6,among which the stump after 6 years of cutting had sprouted,it was showed that roots reinforece- ment of R. 通过对采伐后2年、4年刺槐林伐根和伐后曾经萌蘖的6年伐根的研究表明,刺槐林采伐后根系国土作用明显衰退,但并未立即消失。
- Cut-over land improvement in forest regeneration 林木更新应进行迹地改良
- Gap theory The process by which tropical forest regenerates spaces opened by windfalls. 缺口原理热带森林在被大风刮倒的地区再生的过程。
- The area of artificial forestation, forest cover rate and forestry land were increasing steadily, but trees along the road and field were reducing greatly. 人工造林面积、森林覆盖率和林业用地面积平稳上升,但四旁植树株数下降幅度较大。
- Gap theory: The process by which tropical forest regenerates spaces opened by windfalls. 缺口原理:热带森林在被大风刮倒的地区再生的过程。
- Though China has made remarkable achievement in artificial forest creation, such forests have not substantially protected the biodiversity, because of the monotony of the kind of such forests. 加之人工林林种单一，虽然部分地区森林覆盖率较高，但生物多样性却没有得到很好的保护。
- Factor Analysis on Natural Regeneration of Platycladus orientalis Artificial Forest in Karst Area of Guizhou Province 贵州喀斯特地区侧柏人工林天然更新效果的因子分析法研究
- Artificial forest and secondary forest 人工林与次生林
- Artificial forest of Alnus cremastogyne 桤木人工林
- Artificial forest of Betzda alnoides 西南桦人工林
- This dress is made of artificial fibers. 这件衣服是人造纤维的。
- The forest will act as a defense against desert dust. 森林能起防御沙漠灰沙的作用。
