13份多年生禾草在三江源地区的生产性能与繁殖能力

Productive and Reproductive Performance of Perennial Forages in Sanjiangyuan Area

为筛选适宜在三江源地区补播的多年生优质牧草,在青海省甘德县黑土滩上进行了13份禾本科牧草生产性能与繁殖能力的比较试验。结果表明,同德老芒麦(Elymus sibiricus cv.Tongde)干草产量最高,为5030kg/hm^(2);阿坝垂穗披碱草(Elymus nutans cv.Aba)种子产量和粗蛋白含量均最高,分别为1091kg/hm^(2)和7.29%;种子产量(万粒/hm^(2))最多的为青海草地早熟禾(Poa pratensis cv.Qinghai),为259459.94万粒/hm^(2)。利用13份供试材料的干草产量、粗蛋白含量、粗脂肪含量、可溶性糖含量、中性洗涤纤维含量和酸性洗涤纤维含量的相对值进行灰色关联度综合评价以及聚类分类。饲草生产性能最好的为阿坝垂穗披碱草,其次为垂穗披碱草(新品系)[Elymus nutans(new line)]。其中大粒种子表现最好的为阿坝垂穗披碱草、垂穗披碱草(新品系),小粒种子表现最好的为青海草地早熟禾、溚草(Koeleria cristata),以上材料在饲用和自繁能力方面均表现较好,适宜在三江源黑土滩种植。

In order to select high-quality perennial forages suitable for resowing in black soil of Sanjiangyuan area,an experiment was conducted to compare the productive and reproductive performance of 13 gramineous forages in black soil in Gande County,Qinghai Province.The results showed that the hay yield of Elymus sibiricus cv.Tongde was the highest(5030 kg/hm^(2)).The seed yield and coarse protein content of Elymus nutans cv.Aba were the highest(1091 kg/hm^(2) and 7.29%,respectively).The highest seed yield(ten thousand seeds/hm^(2))was Poa pratensis cv.Qinghai(259459.94 ten thousand seeds/hm^(2)).The relative values of hay yield,and contents of coarse protein,crude fat,soluble sugar,neutral detergent fiber and acid detergent fiber of 13 tested materials were used for grey correlation and cluster analysis,in which Elymus nutans cv.Aba had the best production performance,followed by Elymus nutans(new line).Among them,Elymus nutans cv.Aba and Elymus nutans(new line)had the best performance in large seeds.Pou pratensis cv.Qinghai and Koeleria cristata had the best performance in small seeds,which had optimal performance in terms of feeding and reproduction,suitable for planting in black soil of Sanjiangyuan area.