藏北嵩草种质资源评价

Evaluation of Germplasm Resources of Kobresia littledalei in Tibet

对藏北当雄平均海拔4200m以上的高寒沼泽化草甸亚类优势种藏北嵩草种质资源进行了群落组成、生长发育特性、繁殖特性、种子发芽率、牧草品质等方面的试验研究。结果表明:藏北嵩草平均株高30cm,5月中上旬返青,10月初枯黄,枯黄期来临前粗蛋白质含量迅速降低;野生藏北嵩草种子产量为15.32kg/hm2,当年采集的种子在贮藏3个月后发芽率为62%,经1%浓度NaOH溶液处理后种子发芽率为72%;藏北嵩草叶量丰富,产草量较高,适口性较好,属于良等牧草。建议藏北嵩草在8月刈割后调制成青干草,作为冬春季补饲饲草。

Community composition, growth and development characteristics, reproductive characteristics and forage quality of germplasm resources of Kobresia littledalei were studied. The results showed that Kobresia littledalei were the dominant species in alpine swamp meadow of Dangxiong, Tibet; and Kobresia littledalei possessed good quality, high yield and fine palatability; seed yield of wild Kobresia littledalei was 15.32 kg/hm^2; seed germination percentage was 62% after three months＇ storage.