藏羚羊冷季对干物质的消化效率

藏羚羊（Pantholops hodgsoni）为青藏高原特有物种，也是世界上最为珍贵和稀有的物种之一。作为青藏高原野生食草动物的典型代表，藏羚羊种群也是构成青藏高原自然生态系统极为重要的组成部分。藏羚羊独特的体态和生理结构，对研究生物适应与进化，尤其是研究高原条件下的生物适应与进化，维护高原地区生态平衡均有极为重要的意义（郑中朝和李宏，2002）。对藏羚羊牧草利用特征的研究对其营养生态学的研究具有重要的科学价值。本文采用藏羚羊饲草中酸不溶灰分作为内源指示剂，对其冷季牧草消化率进行了初步研究，现将结果予以报道。

Herbage utilization of Tibetan antilope (Pantholops hodgsoni) during cold season

Tibetan antelope(Pantholops hodgsoni),a ruminant endemic to the Qinghai-Tibetan Plateau,inhabit alpine regions above 4 000 m elevation.An important constraint for Tibetan antelope is the sparse and limited vegetation available at these high elevations,but there is little information on their physiological adaptations and nutrition.We estimated dry matter digestibility of 5 captive Tibetan antelope at the Tiebujia Grassland Station(3 250 m)in early April 2006,using acid insoluble ash.Dry matter digestibility of blended herbage was approximately 70%,and dry matter digestibility of graminoids was 65%-73%.Tibetan antelope have higher dry matter digestibility than domestic ruminants such as Tibetan sheep and goats.These preliminary results will be helpful for study on herbage utilization of Tibetan antelope.