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森林     
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  forest
     Theory and Practice on Sustainable Developmental Management of Forest Environment
     森林环境可持续发展管理的理论与实践
短句来源
     A Study on Long-term Site Productivity of Different Forest Types in Jiulongshan Mountain
     九龙山不同森林类型立地长期生产力研究
短句来源
     Using Nonlinear Theory to Study Forest Stock Qantitative Estimation Based on "3S
     用非线性理论研究以“3S”为基础的森林蓄积定量估测
短句来源
     Study on the Diversity of Forest Plants and Related Factors in the Eastern Part of Northeast Forest Region
     东北东部森林植物多样性及其影响因素研究
短句来源
     Study on Payment Mechanism of Forest Ecological Compensation
     森林生态效益补偿机制研究
短句来源
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  forests
     Study and Evaluation on Water and Flood Regulation by Forests on Slope Land in the Three-Gorge Reservoir Area
     三峡库区坡地森林理水调洪功能研究与评价
短句来源
     Study on the Construction Theory and Comprehensive Assessment of Urban Forests
     城市森林建设理论及城市森林综合评价的研究
短句来源
     Study on Sustainable Management of Tropical Forests in Hainan Island, China
     中国海南岛热带森林可持续经营研究
短句来源
     A Study on the Technology of Helth Monitoring and Regulation of the Forests under Acid Deposition in Tieshanping, Chongqing
     酸沉降条件下的重庆铁山坪森林健康监测及调控技术研究
短句来源
     Study on Forests Biodiversity and Ecosystem Service Value Simulation in Wuling Mountain
     雾灵山森林生物多样性及生态服务功能价值仿真研究
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  forestry
     Research on Economic Problem of Forestry Carbon Sink
     森林碳汇经济问题研究
短句来源
     Dynamic Analysis of Forest Resources and Biodiversity Economic Value in Yingchun Forestry Bureau
     迎春林业局森林资源及生物多样性经济价值的动态分析
短句来源
     Research on Value Evaluation for the Assets of Forestry Biodiversity
     森林生物多样性资产价值评估研究
短句来源
     S.D.Model on Dynamic Prediction of Forest Resources in A Mu Er Forestry Bureau
     阿木尔林业局森林资源动态预测S.D.模型
短句来源
     K-T TRANSFORMATION'S FORESTRY SIGNIFICANCE AND APPLICATION OF IT TO REMOTELY SENSED ESTIMATE OF STAND VOLUME
     K-T变换的林学意义及其在森林蓄积量估算中的应用
短句来源
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  in forest
     Application of Data Warehouse Technology in Forest Resources Statistic Analysis
     数据仓库技术在森林资源统计分析中的应用——以森林林木面积、蓄积统计分析为例
短句来源
     Preliminary Research on the Application of ERS 1 SAR in Forest
     ERS-1SAR影像森林应用研究初探
短句来源
     The standing stock of litter fall in forest park was 4 317.5 t,and the amount of organic C,N,P,K,Ca and Mg contents were 4 643.51 kg/hm2,108.04 kg/hm2,10.72 kg/hm2,48.26 kg/hm2,156.75 kg/hm2 and 23.96 kg/hm2,respectively,which showed that the litter fall of the forest park was an important nutrient storeroom.
     大蜀山森林凋落物现存量初步估算为4 317.5 t,有机碳、N、P、K、Ca、Mg的含量分别为4 643.51、108.04、10.72、48.26、156.75、23.96 kg/hm2,可见凋落物是森林重要的营养库之一。
短句来源
     Application of GPS in Forest Survey
     浅谈卫星定位仪GPS在森林调查中的应用
短句来源
     Study method and research advance in forest CO_2 flux
     森林生态系统CO_2通量的研究方法及研究进展
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  forest
Moreover, a backward reasoning forest of a reachable marking was generated for explicitly representing reachable paths in RBS.
      
Growth Model System for National Continuous Forest Inventory
      
A Growth Model System is developed for data updating and forecasting of the national continuous forest inventory.
      
Its design is based on the inherent forest growth laws, and its parameters are estimated by modern regression methods.
      
It is suitable for forest resource information updating and forecasting for a large region, e.g., a province.
      
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  forests
The ecological water requirement of forests is defined as the water resources used to maintain and improve the natural balance of forest ecosystems, which can be expressed by evapotranspiration of trees during the growing season.
      
With geographic information system (GIS), the ecological water requirement for forests in the Jinghe watershed, western China was estimated.
      
The results revealed that the minimum and suitable ecological water requirements of the forests in the Jinghe watershed were approximately 204×107 and 340×107 m3, respectively.
      
Although the RENIs of plantations in rehabilitated fields are a little lower than those of natural forests, they are higher than those of cultivated crops.
      
Comparative Analysis of Plant Diversity of Pinus tabulaeformis Forests in Ten Regions of Beijing Mountainous Areas
      
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  forestry
According to the international methods of pest risk analysis and urban forestry characteristics in Beijing, a quantitative risk assessment system in Beijing for three primary non-indigenous pests was proposed.
      
Eco-emigration and the return of marginal agricultural land to forestry can be practiced.
      
This study was conducted at Maoershan Forest Research Station (45°21'-45°25'N, 127°30'-127°34'E) owned by Northeast Forestry University in Harbin, northeast China.
      
The Maoershan forestry centre is situated in the Zhangguangcai Mountain of the Changbai mountain range.
      
Following the principles of runoff-collecting forestry and applying the forest structure investigation results, the authors developed a formula to calculate appropriate density for forests on the basis of different diameters at breast height (DBH).
      
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  in forest
Nitrate has been recognized as the dominant mineral nitrogen form in most agricultural soils and the main nitrogen source for crops, but it is not usually the case in forest ecosystems.
      
Fine root lifespan and turnover play an important role in carbon allocation and nutrient cycling in forest ecosystems.
      
Soil properties in forest gaps and under canopy in broad-leaved Pinus koraiensis forests in Changbai Mountainous Region, China
      
Results showed that compared with farmland watersheds, runoff generation time in forest watersheds was delayed remarkably, and peak flow was reduced greatly, which indicates that vegetation played an important role in holding and absorbing rainfall.
      
The two forests differ in forest humus layer; it is deep in the Ailao forest while little is present in the Xishuangbanna forest.
      
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