高寒地区禾本科牧草生产力适应性评价

Evaluation of Productivity and Adaptability of Gramineae Forage in Alpine Area

在玉树县巴塘乡铁力角村冬春退化草地上,开展多年生禾本科牧草引种试验,共引种7属15个品种。2年的试验结果表明,15个品种在巴塘地区均能正常越冬并完成生育期。牧草产量和种籽产量比较表明,其中同德老芒麦(E.sibiricus L.'Tongde')第2年干草产量最高为10030.8 kg·hm^(-2),同德短芒披碱草(E.Breviaristatus Keng f.'Tongde')草籽产量最高,达到2986.7 kg·hm^(-2)。所有牧草品种均能完成生育期,并且第2年株高、盖度和产草量均高于第1年,适应玉树地区的生态环境,生产力均较好,适宜在玉树地区推广。

The fifteen perennial gramineous forage varieties of seven genera were introduced and performance test was carried out in the winter and spring degradation grassland of Yushu county.The test results of two years showed that the fifteen varieties all could normal winter in the area and complete the growth period.Forage yield and seed yield comparison showed that the highest hay yield of E.sibiricus L.＇Tongde＇ was 10030.8 kg· hm∽（-2） in the second year,and the seed yield of E.Breviaristatus Keng f.＇Tongde＇was the highest,up to 2986.7 kg ·hm∽（-2）.The growth periods of all forages could be completed and the heights,coverage and forage yields of all in the second year were higher than the first year.The forage grasses of all tested varieties had greater productivity and better adaptability to the ecological environment of Yushu.Therefore,all tested varieties are suitable for promotion in Yushu area.