土地利用

The soil degradation index is set up to describe relative soil degradation degree of different land use systems.

建立土壤退化指数，计算研究区各土地利用系统的土壤相对退化程度。

Nutrient losses of five kinds of land use systems in the Three Gorge Reservior Area was studied.

通过两年的定位实验，研究了三峡库区5种代表性土地利用方式对养分流失的重要性。

In different land use systems,the percent of nutrient output in runoff is different.

土地利用方式对系统N、P、K的径流输出影响显著。

Runoff and sediment yields are greatly affected by the type of land use.

土地利用类型不同对产流产沙的影响程度不同。

And remote sensing images of 2004,2000 and 2006 were selected as sources of primary data.

土地利用变化的动态研究是世界性的课题。

Assuming that half of the carbon loss in the degraded terrestrial ecosystem in current forest and grass areas are restored during the next 50 years or so, the terrestrial ecosystem in China may sequestrate～12.0Pg of organic carbon from the atmosphere, which represents a considerable offset to the industry's CO〓 emission.

5在现有的气候条件下，未来50年或更长的时间上，如果我们能通过有效的土地利用措施使我国现有林地和草地面积上的生态系统碳损失量恢复其中的1/2，那么我国陆地生态系统将具有～12.0Pg C的碳汇潜力。

Shadow price ; sensitivity ; land utilization ; static model ; dynamic model

影子价格；敏感性；土地利用规划；静态模型；动态模型

The results are as follows:(1) The soils are mainly composed of sand and silt.

在不同的土地利用强度下土壤粒度分布表现出了不同的特征。

The content included (1) characterizing macropres shapes;(2) obtaining the index to charaterizing soil macropore quantificationally through digitalizing and analysising the photo of soil section;(3) comparing the shapes of macropores among soils, which reasons were discussed;(4) studying the influence of the zonal diversity, soil depth and land utilization on macropore characeristics;(5) estimating the space variability of macropore in the microscale using spore variability index;(6) analysising the connectivity and sinuosity of macropore using preferential flow breakthrough curve;(7) discussing the feasibility of indicating the preferential flow degree using macroporosity and macropore perimeter.

系统划分了大孔隙类型；描述了大孔隙形态；通过对土壤切片图像数字化处理和分析，获得了描述大孔隙特征的两个基本指标：大孔隙度和周长，并对大孔隙进行了定量化地描述；比较了各土类之间大孔隙的形态差异，从土壤发生学的角度对其原因进行了分析；研究了地带性差异、土壤层次和土地利用方式对大孔隙特征的影响；阐明了小尺度范围大孔隙的空间分布特征；结合Br〓标记优先水流穿透曲线分析了大孔隙的连通性和弯曲性，探讨大孔隙形态指标评价大孔隙优先水流作用强弱的可行性。

As accelerating economic growth, rapid urban sprawl and dramatic change of land use structure became an important issue.

社会经济的高速发展带动了城市的空间扩展，而城市扩展必然引发土地利用结构的变化。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。