Angular Distribution of Element Contents in Tree Rings and the Environmental Information

来源 :Pedosphere | 被引量 : 0次 | 上传用户:soul566
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
Element contents of tree rings and soils near tree roots collected from Deodar cedar (Cedrus deodara (Roxb.) G. Don) and Masson pine (Picks massoniana lamb.) were determined to study the relationship between the angular distribution of element contents in tree rings and the environmental information. The chemical composition and properties of soils are very much complicated, which leads to the non-uniform distribution of the element contents in tree rings. The statistical multi-variable regression method was used to got the information of the tree-centered distribution of element contents in the environment (soil) (C’), C’(z, θj ), from the distribution of element contents in tree rings (C), C(Z, θi), which depends on the plane azimuth angle (θi), i. e., C=C(Z,θi), where Z is the atomic number of the element, with a satisfactory result,though this study is only a primary one. Element contents of tree rings and soils near tree roots collected from Deodar cedar (Cedrus deodara (Roxb.) G. Don) and Masson pine (Picks massoniana lamb.) Were determined to study the relationship between the angular distribution of element contents in tree rings the chemical composition and properties of soils are very much complicated, which leads to the non-uniform distribution of the element contents in tree rings. The statistical multi-variable regression method was used to get the information of the tree- centered distribution of element contents in the environment (soil) (C ’), C’ (z, θj), from the distribution of element contents in tree rings (C), C (Z, θi), which depends on the plane azimuth angle (θi), ie, C = C (Z, θi), where Z is the atomic number of the element, with a satisfactory result, though this study is only a primary one.
其他文献
怎样使人多花钱?这一与中华民族几千年厉行节约,新三年、旧三年、缝缝补补又三年优良美德相违的论题,本不应成为议论主题,而如今却成为困扰中国政府的难题——启动内需。 Ho
4月6日,联想电脑公司在京发布了采用英特尔赛扬处理器的新款笔记本电脑联想昭阳6700DTF 系列。这是国内第一款赛扬笔记本。该系列笔记本电脑采用了笔记本电脑专用的赛扬266C
As a rising market,however,it’s in urgent need to improve its mechanism to better cope with global financial fluctuation. As a rising market, however, it’s i
eMachines 公司4月初宣布,它在2月份的北美PC 零售市场上所占份额的排名已上升到第四位。该公司计划采取新的行动,以图继续保持这一发展势头,给竞争对手造成更大的压力。eMa
高职院校冶金技术专业课教学是以培养学生掌握钢铁企业生产职业技能为最终目标,为学生毕业之后进入钢铁企业,更快胜任钢铁生产岗位具体操作打下坚实的基础。本文通过分析当前
1范围   本标准规定了液化气码头设施、设备的配备和安全技术要求。   本标准适用于所有液化气码头。 2引用标准(略) 3定义 本标准采用下列定义。 3. 1液化气体 Liquefied
期刊
服务地方经济建设,切实加强内涵与特色建设,是高职院校提升核心竞争力的关键问题。湖南高职院校按照现代职业教育发展要求,对接湖南四大国家战略发展和新兴产业发展需要,推进
4月7日获悉:上月即已宣布的 Intel公司550MHz PIII Xeon 处理器开始交货,MicronElectronics 是第一个宣布使用该处理器的服务器厂商。Intel 公司这种用于服务器的最快的芯片
1934年,刚从斯坦福大学电气工程系毕业的戴维帕卡德(Dave Packard)和比尔.休利特(Bill Hewlett)去科罗拉多山脉进行了一次为期两周的垂钓野外露营。由于彼此对很多事情的看