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- In this paper, 12 years old Chinese Fir clones were studied on the genetic variation of growth properties, basic density and tracheid morphological characteristics. 本文综合研究了12年生杉木无性系试验林的生长性状、基本密度和管胞形态的遗传变异规律。
- We examined winter temperature gradients across old growth Douglas fir forest edges and compared these to corresponding summer gradients. 自 1 991年 1 0至 1 992年 5月 ,对林缘至原始花旗松林林内的温度 ,进行了连续的实地测量 ,并与相应的夏季温度变化加以比较。
- Influences of the Ecological Ground Clearances (EGC) on Chinese fir Growth and diversity of species were studied in this paper. 摘要研究了采伐迹地采取生态型林地清理方式对衫木生长及物种多样性的影响。
- In this paper, the biomass and productivity of 10-year and 11-year old second generation Chinese fir plantation in Huitong County were studied. 本文对会同10年生和11年生第二代杉木人工林的生物量和生产力进行了测定和研究。
- Seed stability of clone is a major yield facter in Chinese fir. 杉木种子园无性系结实稳定性是高产稳产的重要因素。
- Genetic variations of growth traits, wood basic density and tracheid length of Chinese fir clones were investigated in this paper. 摘要对杉木无性系生长性状、木材基本密度和管胞长度的遗传变异进行了研究。
- For the growth in collar - diameter and height of Phoebe bournci tree, the best immixture proportion was 2 (Phoebe bournei) x 1(Chinese Fir) in the same planting - line. 本研究为营造楠杉混交林提供可借鉴的科学理论依据,而且楠杉混交林分具有互利双赢的良好的生态效益。
- Consequently, the results show that the RMC method has a distinct effect on recovering species diversity of Chinese fir plantations in southern China. 结果表明,残留物管理育林法对杉木林地的物种多样性有着明显有恢复作用。
- Physiognomy classifies forests based on their overall physical structure or developmental stage (e.g. old growth vs. second growth). 地貌样式林根据它们整体物质结构或发展阶段(例如原生和次生)。
- Chinese fir (Cunninghamia lanceolata Lamb.) is one of the most important timber tree species planted in southern China. 摘要杉木是我国南方最重要的造林用材树种。
- Once up, the biome can be kept awake past its normal retiring time by pruning old growth to stimulate new CO2-consuming growth. 一旦被唤醒,这个生态群落就可以通过修剪枝条来促发新枝消耗二氧化碳,渡过它本该休憩的时间。
- STUDY ON MOLECULAR GENETIC VARIATION OF SUPERIOR TREES IN CHINESE FIR(CUNNINGHAMIA LANCEOLATA(LAMB.)HOOK. 杉木优树分子遗传变异的研究
- Old growth as the age, the heart beats, hemal sclerosis waning strength to the brain, heart loses elasticity blood was very hard. 老年人随着年龄的增长,心脏跳动的力量逐渐减弱,血管硬化失去弹性,心脏向脑部供血本来就很费力。
- Decomposition interaction of mixed litter between Chinese fir and various accompanying plant species. 杉木与伴生植物凋落物混合分解的相互作用研究
- Objective To prevent occurrence of limbs deformities and reduce deformities by allografts of cultured cartilages into old growth plate defects. 目的将培养软骨移植修复生长板陈旧性缺损,防止肢体畸形发生,减轻畸形程度。
- The influence of clear cutting Chinese fir plantation on the characteristics of runoff water chemistry of forestland. 与相似的文献。
- The radial variation patterns of wood density in19 Chinese fir provenances were studied by means of X-ray wood densitometry. 以微密度分析对19个种源杉木的木材密度径向变异模式进行了研究。
- Young branches glabrescent, older growth drying gray-brown, lenticellate. 幼枝后脱落,老枝干燥灰棕色,具皮孔。
- In wood processing, especially the processing of Chinese fir, wood is liable to crack when dried with the core, which affects productquality. 在木材加工中,尤其是杉木加工,在银材烘干过程中木才带芯烘干造成木材列裂、裂缝,影响产品质量。解决木材带芯烘干中开裂技术难题。
- Bob Taylor, the co-founder and chief executive of Taylor Guitars in El Cajon, Calif., is also a proponent of a "green" effort that aims to maintain old growth forests and the wood supply used to manufacture guitars. 鲍伯泰勒----泰勒吉他的创办人之一兼执行长官,也同样是“绿色”努力计划的支持者,此计划针对保护成熟生态森林的可持续发展。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries