宁南半干旱区草原群落结构与生物量的研究

天然草场是草原畜牧业赖以生存的物质基础。宁南半干旱区天然草场面积辽阔，植物种类繁多。由于地理分布、生长季节及年度变化的不平衡，使本区草场的饲草供应极不稳定。研究不同草原群落结构及生物量的年变化和季节动态，可以人为调整饲草的供需关系，做到畜草平衡。1980～1985年作者在几个主要草场类型上进行了草场生产力定位研究，研究结果为因地制宜合理利用草场资源、指导畜牧业生产发展提供了科学依据。

Study on Grassland Community Structure and Biomass in Semiarid Region of Southern Ningxia Hui Autonomous Region

Grassland is the imperative material base for animal-husbandry.In the semi-arid region of southern Ningxia, grassland exists expensively, and species are abundant. However, owing to the unconsistency of geographical localities, growing seasons, as well as annual changes in yields, the development of animal husbandry is greatly unstable and vulnerable.However, by researching, the relation between the yearly changes and season-ly trends of community structures composition, biomass in different type of grasslands communities and the corresponding rainfalls,developling laws of above and underground biomasses, we can regulate the providing and demanding relationship conciously,so that the balance between animal and forage is insured,and the comprehensive assessment for grassland resources can be made from it for use in deciding reasonable and effective measures for utilizing and improving grassland. For the above purposes, research sites were fixed in three main types of grassland communities, to get the field data needed.