Department of forest sciences is primarily dedicated to education and research in forest sciences including developing forest ecosystem management, improving forecasts of forest growth and yield, designing cost-effective forest regeneration practices, natural resources management, biometeorology, soil microbiology and biochemistry, horticulture and agronomy, animal science.
森林科学系主要致力于森林科学的教育及研究，其科学领域包括发展中的森林生态系统管理，改良森林生长和生产量的预测，森林重建实践的成本有效设计，自然资源管理，生物气象学，土壤微生物学和生物化学，园艺和农学，动物科学。
The results showed that the 89 Sr was transferred and accumulated to rice in the ecosystem by absorption action when 89 Sr was entered the surface water. The specific activity of 89 Sr in root was the highest. The absorption and accumulation of 89 Sr in rice were not decreased significantly by application of kieselgur in the surface water. The specific activity of 89 Sr in soil follows a negative exponential relation with depth of soil profile.
结果表明：田表水中的89Sr将向水稻转移，通过吸附和吸收作用在水稻各部位中积累，其稻根中的89Sr比活度高于其余各部位；在本试验硅藻土撒洒量的范围内，未能明显降低水稻对89Sr的吸收和累积；89Sr在水稻中的纵向分布均与土层深度呈单项指数负相关。
Water, soil, air and vegetation are the important components of natural ecosystem which influence and depend on each other. Land use change becomes the stimulative factor of water resources and water environmental change through its direct or indirect impact on water cycle.
中文题名河北南部平原土地利用变化对地下水资源的影响副题名外文题名 Impact of land use change on groundwater resources in the southern Hebei plain 论文作者许月卿导师李秀彬学科专业自然地理学研究领域研究方向学位级别博士学位授予单位中国科学院地理科学与资源研究所学位授予日期2003 论文页码总数173页关键词水资源地下水土地利用河北平原馆藏号BSLW /2003 /P641 /18 水、土、气、植被是自然生态系统的重要组成部分，它们相互影响、相互依存。
Land degradation, especially severe soil erosion, adversely influences the ecosystem in the basin. In this thesis, remote sensing is used to derive not only the information about land Use and Land Cover Change, but also the surface variables for evaluating regional evapotranspiration.
本文以祖厉河流域为研究区，基于遥感影像，提取了流域尺度的土地利用/土地覆盖以及陆面蒸散发通量，进行了流域土地利用/土地覆盖分布规律及其变化研究和流域尺度地气水热交换的时空分异研究。
Huajiang gorge district is characterized by deep buried groundwater, drought terrain, remarkable artificial accelerating soil erosion processes, secondary vegetation, dry and hot microhabitat, which is a kind of rocky desertification and half rocky desertification ecosystem.
：花江喀斯特峡谷区地下水埋藏深，地表干旱，存在显著的人为加速土壤侵蚀过程，植被次生性明显，生境干热特征显著，是已石漠化和半石漠化的生态系统。
Studies were conducted on nitrogen balance and cycling, such as N deposition, ammonia volatilization, N loss with runoff and leaching in a pasture ecosystem of Smooth Crabgrass in typical red soil in South China.
通过在我国南方典型红壤旱地种植牧草马唐，对大气N沉降、氨挥发、径流、淋溶等N素循环量进行了研究。
This paper presents and summaries the application of stable and radioactive carbon isotopes (δ13C and 14C) in the regeneration of longterm carbon dynamics process of ecosystem(such as the historical pattern of C3/C4 vegetation) and in SOC cycling. The application of isotopic techniques in the studies of SOC source and cycling, soil CO2 flux change and component difference, isotopic enrichment, etc. is also discussed. In addition, the fundamental issues related to SOC dynamics are outlined and the major topics for isotopic tracer of SOC dynamics in future are proposed in the paper.
首先介绍了碳的一种稳定性同位素(13C)和放射性同位素(14C)在生态系统长期动态过程的重建(如C3/C4植被的历史格局)、土壤有机碳周转周期等方面的应用，探讨了同位素示踪技术在土壤有机碳来源、周转周期、土壤CO2通量的变化和组分区分、同位素富集等研究领域的应用，归纳了土壤碳循环研究中的基本问题，提出了未来土壤碳循环同位素示踪的主要研究方向。
HJ4/9Minjiang valley is a fragile area in natural geography environment and forest ecological ecosystem according to lots of data of meteorology, geology, soil and hydrology, huge drop in topography, strong precipitation, easily eroded soil growing from granite, fragility to defend erosion in red soil area, water system of long handle sector and alternate with arrange canyon and basin vale benefit for collection water, and go against drain.
通过收集和分析大量闽江流域气象、地质、土壤、水文和森林资源等资料，揭示了闽江流域自然地理环境和森林生态系统的脆弱性。地形落差大，降水集中且强度大，花岗岩发育的土层易遭侵蚀，红壤分布区抗冲蚀性弱，长柄状扇形水系，峡谷与盆谷相间排列，利于汇水，不利于排水。
Based on the field investigation for the tropic rainforest (include three site on different altitute), the rubber plantation with different years (for planting 8 years, planting 20 years, and planting 30 years), and a kind of second rainforest in Nabanhe river Basin Nature Reserve of Longitudinal Range-Gorge Region of Yunnan, the vegetation and soil of above site were analzed. The effects of rubber plantation on tropic rainforest ecosystem were studied.
通过实地调查数据对云南纵向岭谷区纳板河自然保护区热带雨林生态系统（包括不同海拔高度的3个样地），不同种植年限的人工橡胶林（分别为种植8a、种植20a和种植30a的3个样地）及1个次生林样地，植被和土壤的比较研究，定量分析了橡胶种植对热带雨林生态系统的影响。
In this paper, the geographical distribution, species composition, community structure, and natural regeneration of this ecosystem as well as the related climate and soil conditions were analyzed, and a comparison on the characteristics of this ecosystem with those of grassland-and forest ecosystems was made.
本文分析了该生态系统的地理分布、气候特点、土壤状况、物种组成、群落结构及天然更新状况等，比较了草原、森林和稀树草原3个生态系统的特征，提出了在内蒙古高原分布的温带榆树稀树草原生态系统是在独特的气候、土壤和地形条件下形成的经度地带性顶极植被，决定其存在的最关键因素首先是降水量和土壤的水分条件，其次才是沙质土壤。
In this paper, the geographical distribution, species composition, community structure, and natural regeneration of this ecosystem as well as the related climate and soil conditions were analyzed, and a comparison on the characteristics of this ecosystem with those of grassland-and forest ecosystems was made. It was indicated that the temperate U.
本文分析了该生态系统的地理分布、气候特点、土壤状况、物种组成、群落结构及天然更新状况等，比较了草原、森林和稀树草原3个生态系统的特征，提出了在内蒙古高原分布的温带榆树稀树草原生态系统是在独特的气候、土壤和地形条件下形成的经度地带性顶极植被，决定其存在的最关键因素首先是降水量和土壤的水分条件，其次才是沙质土壤。
The main fi ndings were i copper was strongly bound to organic layer and seemed to be the main pollutant in the ecosystem while zinc was the most mobile element and did not accumulate to any specifi c part of the ecosystem, ii the forest mosses and epiphytic lichens were the most sensitive plant species and the seedlings of the vascular plants that had survived near the smelter were absent, iii there was a highly resistant soil decomposer community near the smelter although the activity of the soil animals and microbiota was low and their community structure altered, iv many insect species also suffered from pollution although the adverse effects caused by forest pests increased with pollutant load, v the low survival rate and breeding success of hole-nesting passerines near the smelter was caused by habitat changes and the quality of food, vi the adverse effects seem to be to some extent reversible after decreased pollutant load or remediation actions.
主要fi ndings是i铜强烈一定到有机层数、并且似乎是主要污染物在生态系、当锌是最流动的元素，并且没有积累对生态系时的任何specifi c零件，ii森林青苔和附生植物地衣是含羞草种类，并且在精炼工附近生存了是缺席维管束植物的幼木，iii有一个高度抗性土壤decomposer社区在精炼工附近、虽然土壤动物和microbiota的活动是低的、并且他们的修改过的社区结构、iv许多昆虫种类也遭受污染、虽然森林造成的不利影响虫增加了与污染物装载、v孔嵌套雀形目鸟的低生存率和繁殖的成功在精炼工附近是由栖所变动造成的，并且食物的质量，vi不利影响似乎在某种程度上是双面布料在减少的污染物装载或治疗行动以后。
And then the new trend of study on environmental behaviors of PCP in soil ecosystem is presented.
同时结合目前国内外的研究现状，提出了五氯酚在土壤生态系统中环境行为新的研究方向。
After fencing, disturbance will be removed and plant community transform from annual plants to secondly stable shrub or relatively stable steppe, and biodiversity also increase, ecosystem tend to be more stable. Soil develop from mobi
围栏封育，干扰源消除，群落逐渐由不稳定的一年生植被向次稳定的灌丛化植被和相对
The soil microorganisms, a main part of the grassland ecosystem of grassland, play dorminant roles in the process of organic substance decomposition and conversion, as a result of which influence energy flow and substance conversion.
草地土壤微生物是草地生态系统的重要组成部分，在有机物质分解转化过程中起主导作用，从而能动地影响草地生态系统中能量流动和物质转化过程。
Hubei can be divided into 9 kinds of three grade region to soil erosion type and intensity, based on the information of the type and patterns of landforms, crust stability, populationcomposition, formation of landuseing type, structure of natural ecosystem, local industricalcomposition, traffic network and city-town system, natural resources and cleugh density.
以地貌形态类型组合结构及地壳稳定性、人口组成结构、土地利用类型结构、自然生态系统结构、地域产业结构、交通网络和城镇体系结构、自然资源结构、沟谷密度分布信息为基础，将湖北省土壤侵蚀类型、强度划分为9个3级类型区。
The results showed that the amount and species distribution of soil moniliaceous hyphomycetes had an obvious variability in different ecosystem-types.
结果表明，土壤淡色丝孢菌的数量和类群分布在该地区不同生态类型土壤中差异明显。
The forest soil is the important component of the ecosystem of forest.
森林土壤是森林生态系统的重要组成部分。
In the practical ecosystem, bioaccumulation values of REE in wheat root in black soil is lower than that in red soil.
实际体系中，植物根部对腐殖质含量高的土壤中稀土的富集要明显弱于腐殖质含量低的土壤。
Three different constituents were analyzed, including seasonal fluctuation of the main kinds of soil microorganisms、soil enzymes activities and soil nutrition in grassland ecosystem, the effects on them in different grazing rates and the relationship among them.
本论文以内蒙古短花针茅草原的三个不同强度放牧区为研究对象，分析了草原生态系统中主要土壤微生物类群数量、土壤酶活性和土壤养分含量的季节性动态变化，放牧强度对草原土壤微生物数量、土壤酶活性和土壤养分含量的影响，土壤微生物与土壤酶和土壤养分之间的关系。