黄土丘陵区沙棘水土保持薪炭林土地生产潜力研究

本文对黄土丘陵区主要灌木水土保持薪炭林树种——沙棘(Hippophae rhamnoides Lo)的土地生产潜力进行了研究。应用Thornthwait Memorial模型估算了其土地气候生产潜力，揭示了沙棘在该地区实际存在的气候条件下可能达到的理论产量；实测了当前技术经济管理水平条件下所能达到的最高产量——现实生产潜力，分析了目前林业的现实生产潜力与气候生产潜力之间的差距，预示了其发展前景；从合理利用气候资源和充分发挥土地生产潜力角度，提出了沙棘应为当地水土保持薪炭林优选的灌木树种。其结果对该地区培育坡地水土保持薪炭林具有重要的实践指导意义。

Studies on Potential Land Productivity of Hippophae rhamnoides L.for Fuel Wood and Water and Soil Conservation in Hilly Aea of the Loess Plateau

This paper analyzes potential land productivity of Hippophae rhamnoides L., a main shrub species for fuel wood and water and soil conservation in hilly area of the Loess Plateau. With the Thornthwait Memorial Model, the climatic potential productivity, revealing the highest theoretical productivity when make full use of the present climatic resources in this area, and the real potential productivity, the utmost productivity with the available technology and managerial techniques, is calculated. The gaps between climate and real potential productivity are identified, implying the prospect of the cultivation of Hippophae rhamnoides L. in this area. From the point of utilizing fully the climate resources and digging up all the potentials of the specie, Hippophae rhamnoides L. is the best choice in the Plateau for fuel wood and water and soil conservation purposes. The outcome of the study is meaningful and significant to develop fuel wood and water and soil conservation vegetation in hilly area of the Loess Plateau.