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- forest sample plot 森林样地调查
- The paper uses typical sample plot method of forest ecology to obtain field data,and the Walkley-Black acid digestion method for measuring the carbon in the forest and soil is used in this paper. 运用森林生态学典型样地法设立标准地并获取野外数据,采用重铬酸钾-硫酸氧化湿烧法测定植物、土壤中的碳。
- A sample plot of the unstable frequency with crank speed is illustrated. 绘制了不稳定频率相对于曲柄速度的样本曲线。
- Within the stand one sample plot is laid down, often covering a large part of the stand. 在群落片段范围内设置一个样地,通常应占据群落片段的大部。
- Thus setting up a single sample plot in an area can produce some rather bewildering result. 因此,如果在某个地区内只在某单块抽样小区内采样,那末就可能得到某种较为含糊的结果。
- Cumulation in each sample plot was a little different with the annual litter production. 各样地的蓄积量多少与年凋落量有一些差异。
- The typical sample plot with Sophora viciifolia was take as research object in the Zhifanggou catchment of the hilly gully Loess Plateau in July 2002. 于2002年5月份,在陕北黄土区纸坊沟流域选择狼牙刺典型样地,以柠条、撂荒地作为对照。
- There are still some problems in the permanent sample plot database, so using the database for carbon sequestration approximations often result in overestimation. 不过,永久样区设置与资料仍有许多不足,用来估算国有林地蓄积量与碳吸存量容易有高估的情况发生。
- The relationship between the zokor occurrence and canopy density was studied in 5 different types of 11-year-old improved secondary forests ny regular sample plot survey. 摘要通过对次改林地11年的鼢鼠发生和林分郁闭度关系研究发现,鼢鼠密度上升期,鼢鼠密度、雌雄比与郁闭度呈递增关系,成亚比与郁闭度呈递减关系;
- Tentative experimental results demonstrate that the CFI sample plots are well representative of Zhejiang forest resources, and obvious systematic deviation does not exist. 初步试验结果表明,浙江省森林资源连续清查总体样本具有较好的代表性,不存在明显的系统偏差。
- Actual Plot in Forest Sampling Survey 森林抽样调查中的实测样地
- Based on the locating monitoring and sample plot investigation, this paper discussed the structural feature and biomass of soil and water conservative plantation of Armand pine in the upper reach of the Yangtze river. 通过定位监测与样地调查,分析了长江上游华山松水土保持人工群落的的结构特征,并对其生物产量进行了测定。
- The result shows that there are 127 tree species,76 arbor tree species and 51 shrub tree species,in sampling plot. 结果表明:在1 hm2样地内,共记录到木本植物127种,其中乔木为76种,灌木51种。
- The results of the Clustering Analysis divide the forest samples into 4 groups such as Betula forest, broadleaf forest, Picea forest and Quercus forest, showing close relationships between the pollen assemblages and forest communities. 对花粉分析结果进行聚类分析发现,除有个别样外,森林群落的花粉组合和群落植被有很好的对应关系,可根据聚类分析的结果将森林群落划分为桦木林、阔叶树种为主的针阔混交林、云杉林、以栎为主的混交林4组。
- The forest will act as a defense against desert dust. 森林能起防御沙漠灰沙的作用。
- Plus tree selection by sample plot method 标准地法选优
- It is said that there are wolves in this forest. 据说这片森林里有狼。
- On the basis of the data collected from the measurement of the sample plots of the cutting plantation and seedling plantation of Pinus kesiya var. 依据相同立地条件下同龄人工林样地调查数据,分析比较思茅松扦插苗与实生苗造林效果的差异。
- A large part of Africa is made up of thick forest. 非洲的大部分地区都是密林。
- A centerline, usually the mathematical average of all the samples plotted. 中线,通常是所有样本数据的数学平均值。