Soil erosion by wind is a major cause of farmland degradation in arid and semiarid area of north China.
土壤风蚀是中国北方干旱半干旱地区农田土地退化的重要原因。
The dynamic relationship between the biomass of switchgrass and the soil water content in arid and semiarid area was investigated in this paper.
通过在黄土高原半干旱地区种植柳枝稷，构建生物量与土壤水分的动力学关系模型。
In the arid and semi arid area, the precipitation is little, soil moisture insufficient and low survival rate, low preserved rate and slow growing of trees.
干旱半干旱区降水少，土壤水分亏缺，林木成活率低、保存率低、生长缓慢。
Aeolian sandy soil is a kind of specific soil formed in arid or semiarid area. It has specific engineering property.
风沙土是形成于干旱区、半干旱区的一种特殊性质的土。
The leading factors of soil ecosystem in arid area are discussed based an the application of the principle and method of grey relational gradation, the important part of grey system theory.
本文应用灰色系统理论—灰色关联识别原理和方法，探讨干旱区土壤生态系统的主导因子识别。
In the arid area, the storage water in deep layers of soil can adjust water utilization of plants, but artificial alfalfa can absorb lots of water from deep layers and lead to soil desiccation.
在干旱地区，土壤深层储水可以调节植物用水，但是人工苜蓿从土壤深层吸收大量水分导致土壤干燥化的发生。
The result shows that the NPP of salinized meadow in hyper arid area is the function of underground water table (UWT) and the temperature in given soil conditions.
结果表明，在一定土壤质地条件下，盐化草甸植被净初级生产力随地下水埋深的增加而逐渐下降。
Due to fewer rainfall, lean soil, serious soil and water loss and the long term negative effect of human activity, the ecological environment in hilly semi arid area is being degraded.
低山丘陵半干旱区气候干旱、土地贫瘠、水土流失严重，加上人类活动的长期负面影响，使得该地区生态环境不断恶化。
Aeolian sandy soil is a kind of specific soil formed in arid or semiarid area.
风沙土是形成于干旱区、半干旱区的一种特殊性质的土。
The main ecological environment problems in the west China are a little rain and arid, serious hazard of wind sand, topography in pieces, vast hilly gully area and intense soil and water erosion.
本文分析了晋陕蒙接壤地区资源开发中的生态环境问题，认为该地区生态环境问题主要有干旱少雨、风沙危害严重；地形破碎、沟壑纵横；水土流失面积大、侵蚀强度大。
The main ecological environment problems in the west China are a little rain and arid, serious hazard of wind sand, topography in pieces, vast hilly gully area and intense soil and water erosion.
本文分析了晋陕蒙接壤地区资源开发中的生态环境问题，认为该地区生态环境问题主要有干旱少雨、风沙危害严重；地形破碎、沟壑纵横；水土流失面积大、侵蚀强度大。
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