摘要
森林-草地生态系统有它的农学含义,涉及前初级生产层、植物生产层、动物生产层和后动物生产层四个生产层的许多方面。草地与林地在系统中以分散型分布、隙地型分布、大片状分布三种方式存在,根据V=a+b模型及其生态场可能出现不同程度的重叠,V=(l+i)(a+b)预示着该生态系统的生产潜势。林草结合,在保持土壤肥力,防止火灾,提供饲料,幼树抚育,改善家畜及野生动物生活环境等方面有积极意义。
ABSTRACT The forest-grassland ecosystem in agronomy refers to the various aspects of the pre-primary production, plant production, animal production and post-animal production stages. In the system forests and grasslands can distribute in three ways: scattered distribution, cluster distri-bution or continuous distribution. The three types of distribution exist according to the model of V=a+b and the ecological fields in each type can overlap with each other in various degrees. The model V=(I+i) (a+b) indicates the production potential within the system. A rational or optimal combination of forests and grasslands will have substantial significance in the conservation of soll fertility, prevention of wild fire, fodder supply, seedling establishment and the improvement eflabitats of wild animals.
出处
《草业科学》
CAS
CSCD
北大核心
1989年第4期1-4,共4页
Pratacultural Science
