桂西天然草地生产性能

采用样地样方法和地上生物量收获法对广西西部(桂西)5个县的天然草地进行调查,结合养分含量分析,探讨桂西天然草地生产力及其开发利用前景.结果表明,桂西草地主要由禾本科草类组成,根据优势种不同,分为五节芒Miscanthus floridulus、类芦Neyraudia reynaudiana、水蔗草Apluda mutica等9个类型,为中草和高草草型,具有相对稳定性、耐旱、耐热的特点.草地群落生物量较高,从产量而言,均达到一级草地水平.但营养型仅为碳型至碳氮型.根据蛋白质含量状况,绝大多数草地类型为中等饲用等级.因此充分利用桂西草地资源优势,引进现代牧草科学的理念和管理技术对天然草场进行改良,引进豆科牧草,提高桂西草场营养等级,促进南方草地经济发展意义重大.

Evaluation of natural grassland resources in the western Guangxi

The natural grassland resources in the western Guangxi was evaluated through investigating the productivity and the result showed that the dominant grasses were from gramineae.The grassland could be grouped into 9 types,including Miscanthus floridulus type,Neyraudia reynaudiana type and Apluda mutica type.They were mid height grass or tall grass.These grasslands were characterized by relatively stable,heat and drought tolerant,and could be sorted to Grade 1 according to their biomass.All the pastures belonged to carbon type and carbon-nitrogen type according to their nutrient content,most of which remained with mid-grade forage according to their protein content.Therefore,with high biomass indigenous species,some other high-quality exotic species,particular legumes,should be introduced to improve the grassland quality.