甘肃宁夏黄土高原半干旱区农业生态系统景观类型研究

STUDY ON LANDSCAPE TYPES OF AGRO-BCOSYSTEMIN SEMI-ARID AREA ON THE LOESS PLATEAU IN NINXIA AND GANSU

农业生态系统景观分类研究的目的是探讨农业生态系统在中小尺度空间的地域分异规律，为优化系统结构、进行系统的景观生态设计、充分合理利用农业自然资源、建立稳定高效农业生态系统、改善和保护农业生态环境提供科学依据。本文分析了甘宁黄土高原半干旱区农业生态系统的现状特性。探讨了农业生态系统景观类型研究的客观基础及其分类的原则、依据和方法。在此基础上，对研究区农业生态系统进行了景观类型划分，对各级各类农业生态系统景观特征进行了评述、并做出了甘肃宁夏黄土高原半干旱区农业生态系统景观类型图。

The main aims of the study on landscape types of Agro-ecosystem(AES)are to in-vestigate the regional differential law of AES in medial and small scale of space and to pro-vide scientific foundation for optimizing the structure of AES,utilizing agricultural natural resources,making eco-device of AES,establishing stable and efficent AES and improving agro-ecological environmental quality.In this paper,the present characteristics of AES in semi-arid area on Loess Plateau are analysed.And the objective of foundation,the principles,the basis and the methods ofclassifying landscape types of AES are investigated,Basing on this theory,the landscapetypes of AES are classified in research area,the characteristics of these landscape types arediscussed,Finally t,ne distributed map of landscape types of AES in semi-arid area onLoess Plateau in Ninxia and Gansu province is presented.