高寒牧区河漫滩草地生产力的评定

Evaluation of Productivity of Alluvial Flat Meadow in High-cold Pasture Region

对河漫滩草地不同季节地上生物量和营养成分含量动态变化进行了测定,并用3头装有瘤胃瘘管的牦牛,采用尼龙袋技术对混合牧草营养成分降解率也进行了研究,结果表明,河漫滩草地地上生物量在整个生长季差异很大,呈"单峰"型表现,最大值出现在8月～9月份,最低值出现在枯草末期。营养价值随生长季的延长而逐渐下降。总的来说,河漫滩草地是一种具有高生产潜力的很有价值的一种草地类型。

Aboveground biomass and nutrient contents of natural alluvial flat meadow were determined and three cannulated yaks were used to study in situation digestibility of each nutrient at various periods, using nylon bag technique. Results showed that aboveground biomass had notable differences and a single climax throughout the growth period with highest value between August and September and lowest at the end of withered period. Feeding value decreased with maturity. In general, alluvial flat meadow had high potential for production and was a valuable type. 