论文部分内容阅读
一、盐池县的农业生态系统经济再生产和自然再生产相结合是农业生产的一个基本特征。农业自然再生产过程,包括农业生物自身的生命繁衍过程和农业生物与环境相互联系的过程。所谓农业生态系统,就是指农业生物(人工培育相饲养的植物、动物)、环境(土地、气候、水等)和人(农业生物的生产者和消费者)的相互联系和依存的集合体。农业自然再生产就是在这个集合体中进行的。盐池县地处鄂尔多斯台地和黄土高原接壤地带。由于台地前期的地质构造和后期的侵蚀堆积,形成了梁滩相间的地形,局部地区自垩纪、第三纪基岩裸露地表。近期由于风蚀引起土地沙
First, Yanchi County’s agricultural ecosystem Economic reproduction and natural reproduction is a basic feature of agricultural production. The process of natural reproduction of agriculture includes the process of the reproduction of life itself of agricultural organisms and the interrelationship between agricultural organisms and the environment. The so-called agricultural ecosystem refers to the collection of agricultural organisms (plants and animals raised by artificial breeding), the environment (land, climate, water, etc.) and people (producers and consumers of agricultural organisms). The natural reproduction of agriculture is carried out in this assemblage. Yanchi County is located in the Erdos platform and bordering the Loess Plateau. Due to the geological structure of the early stage of the platform and the later erosional accumulation, the terrain of the Liangtan and the Baiyun River was formed. In some areas, the bare surface of the bedrock of the Cretaceous and the Tertiary was formed. Recently due to wind erosion caused by sand