中国草食动物科学2026，Vol.46Issue(3)：59-66,8.DOI:10.3969/j.issn.2095-3887.2025.00.095
碌曲县天然草原资源及可食牧草养分含量评价
Evaluation of Natural Grassland Resources and Nutrient Contents of Edible Forage Grasses in Luqu County
摘要
Abstract
To accurately assess the productivity and nutritional dynamics of natural grasslands in Luqu county on the eastern margin of the Qinghai-Tibet Plateau,this study conducted field surveys during the growing season(June-August)on two main grassland types(alpine meadow and mountain meadow).By integrating laboratory analy-sis,geographic information technology,and the relative feed value(RFV)index,the study systematically measured for-age yield,nutrient content,and spatial distribution.Livestock carrying capacity was evaluated based on both dry matter and digestible crude protein(CP)yield.The results indicate that alpine meadow dominates the study area(accounting for 60.21％of the total).During the growing season,hay yield continued to increase while CP content decreased:the county's total hay yield rose from 493 900 t in June to 1 010 200 t in August,while CP content decreased from 13.83％to 11.70％,and the RFV index dropped by approximately 27.6％.Livestock carrying capacity assessment revealed that accounting result based on digestible CP was 0.24 sheep unit/hm2 lower than that based on dry matter on average,with phosphorus(P)identified as the limiting nutrient across the region.Spatial analysis further identified Langmusi town as a high-yield area for CP.In conclusion,this study suggests that carrying capacity evaluation for natural grasslands in Luqu county should shift from a"dry matter balance"approach to a"nutritional balance"framework,implementing zoned precision management strategies focused on protein and phosphorus supplementation,so as to promote grass-livestock balance and ecological conservation.关键词
碌曲县/天然草原/可食牧草/产草量/养分含量/载畜量Key words
Luqu county/natural grassland/edible forage grass/forage yield/nutrient content/livestock carrying capacity分类
农业科技引用本文复制引用
张洁,金加明,耿小丽..碌曲县天然草原资源及可食牧草养分含量评价[J].中国草食动物科学,2026,46(3):59-66,8.基金项目
2023年提前批中央财政林业和草原改革发展资金草原生态保护修复科技支撑项目(甘林草发[2023]211号) （甘林草发[2023]211号）
甘南退化草原生产力提升技术研究与示范 （）
近自然恢复技术在退化草地中的应用与示范 （）
