Growth and chemical composition of silver birch:Comparative study between Lithuania and Romania

来源 :林业研究:英文版 | 被引量 : 0次 | 上传用户:wfdzdb
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The effects of different climatic conditions on growth and chemical composition of Betula pendula in geographically different European regions,Lithuania and Romania,were compared.Birch species in the entire area have a wide natural distribution,but B.pend
其他文献
Vegetation is sparsely distributed in the arid regions of northwestern China,and accurately measuring and partitioning of evapotranspiration is of importance for ecosystems in such areas.In this study,we measured and analyzed diurnal and phenological vari
Traditional fire smoke detection methods mostly rely on manual algorithm extraction and sensor detection;however,these methods are slow and expensive to achieve discrimination.We proposed an improved
Different forest fires causing different degrees of effects occur in fire-sensitive forests due to various reasons such as climate change.Useful as well as harmful aspects of forest fires are a multi-disciplinary research topic.Geographical information sy
在传统的教学模式中,教师讲课占主导地位,课堂上的教科书在便利性和及时性方面远远落后于信息技术教学。为了满足未来社会对人才培养的需求,将讨论中学的信息技术教学问题和改进措施,以期帮助相关的教育工作者对中学信息技术培训理论研究进行积极思考。
幼儿对一切新鲜事物都有着浓厚的好奇心,在幼儿园教学活动中,户外游戏活动的教育内涵十分丰富。教师应基于幼儿的好奇心及其身心发展规律,设计更有针对性的户外游戏,让游戏材料与游戏内容更加满足幼儿的发展需要。为此,我园将户外游戏与实际教学相结合,发展多方面的能力,提高幼儿的探究学习。
Chinese fir(Cunninghamia lanceolata(Lamb.)Hook),a fast-growing and economically important timber tree species in China,is widely used in construction,furniture,and paper manufacture but has a long breeding cycle.Chemical mutagens,such as ethyl methane sul
在现代化的教育趋势中,素质教育的作用越来越凸显,其中,有关培养学生德智体美劳全面发展综合素养的需求也日趋重要。所以,在小学教育阶段,便愈加强调体育教育的重要性,以体育活动为主要途径培养小学生健康的身体素质与积极的锻炼身体锻炼意识。而花样跳绳作为一项既形式简单,又能够为学生提供趣味体验的体育项目,需要教师灵活利用,加强教学。
The positive ecological interaction between gap formation and natural regeneration has been examined but little research has been carried out on the effects of gaps on natural regeneration in forests under different intensities of disturbance.This study e
The diversity of tree species and the complexity of land use in cities create challenging issues for tree species classification.The combination of deep learning methods and RGB optical images obtained by unmanned aerial vehicles(UAVs) provides a new rese
The community species abundance and diversity declined with bamboo invasion had been widely reported worldwide.However,the physiological strategies used during root competition between native species and invasive bamboo are poorly understood.To clarify th