---

作 者 ：陈国良, 刘笃慧

期 刊 ：植物生态学报 1983年 7卷 3期 页码：215-221

关键词：黄土；

摘 要 ：本文从生态系统的整体性和物质能量转换关系出发，应用系统分析的方法，以宁夏固原县为样点，对黄土丘陵区的大农业生态结构进行了分析研究，并建立了最佳生态经济结构模式，同时通过模式计算可以看出，建立合理的生态结构，自然资源可以得到更好的利用，生态平衡可以逐步稳定、协调，水土流失量可减少50一80%，系统的总体功能和经济收益可提高约2—5倍，对黄土高原同类地区调整农业结构可提供一定的参考和依据。

Abstract:The agro-ecological structure in the loess hilly regions was studied. with the data collectea in Guyuan County, Ningxia Province from the viewpoint of ecological integrity as well as conversions of materials and energy by means of systems analysis. A model of optimum eco-economic structure was developed. It can be seen from the calculation with this model that the natural resources will be fully exploited without disbalancing the ecological structure and the soil loss will be reduced by 50--80%. At the same time, the revenue of the system may be raised to about 2–5 times.

---