Soil water environment for optimum afforestation management at Horqin Sandy Land in China
(0) Evapotranspiration combined with soil water movement in poplar plantation was studied at Naiman, in the Horqin sandy land, a transitional zone between the Northeastern Plain and the Inner Mongolian Plateau in northeastern China. First, Local weather data was used to estimate the actual evapotranspiration multiplying potential evapotranspiration by a plant coefficient. Second, a one-dimensional compartmental model was applied to four different densities of poplar planting for estimating hourly changes of soil moisture in the root zone. Here, the plant coefficient was separated into the plant transpiration component and soil surface evaporation component. This model proved to be suitable for determining optimal plant density under dry weather conditions. In the Horqin Desert, the most popular planting intervals in poplar plantation are between 2 ra and 6 m. As a result of numerical simulation, plant intervals of 6 m proved to demonstrate optimal planting density. This approach has proved to be effective for clarifying the soil moisture condition in afforestation under arid climate conditions. This model will be used to evaluate the effectiveness of planting or modifying environments and for preventing desertification, supported by appropriate land-use planning.
poplar planting plant coefficient compartment model water consumption
Aimin HAO Tomokazu HARAGUCHI Takashi KUME Xueyong ZHAO Tsugihiro WATANABE Yoshisuke NAKANO
Research Institute for Humanity and Nature 457-4 Motoyama,Kamigamo,Kita-ku,Kyoto 603-8047 Departments of Environmental Sciences,Faculty of Agriculture,Saga University Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Science,La Emeritus Prof,Faculty of Agriculture,Kyushu University
国际会议
The Four Conference of Asia Pacific Association of Hydrology and Water Resources(亚太地区水文水资源协会第4届科学大会)
北京
英文
301-306
2008-11-03（万方平台首次上网日期，不代表论文的发表时间）