嵩明狗尾草新品系的生产性能评价

Agronomic trait evaluation of new strains of Setaria viridis Songming

摘要:

嵩明狗尾草是经过多年栽培驯化和人工选择培育出的高产优质狗尾草新品系。【目的】 研究嵩明狗尾草新品系的生长特性和生产性能。【方法】 以甘肃野生狗尾草、非洲狗尾草和新品系原始群体为对照，在甘肃兰州大洼山试验基地进行了品比试验。【结果】 嵩明狗尾草新品系在形态特征、牧草品质、生产性能等方面均优于对照品种。其中，嵩明狗尾草新品系平均株高为1.75 m，平均干草产量、种子产量为18 200.85、298.41 kg/hm2，与甘肃野生狗尾草和新品系原始群体差异显著（P＜0.05）；平均叶长、叶宽、穗粗分别为44.63、1.67、1.95 cm，与甘肃野生狗尾草和非洲狗尾草差异显著（P＜0.05）； 平均茎叶比为0.18，与对照差异不显著。【结论】 嵩明狗尾草新品系表现出较好的适应性和丰产性，生产潜力大，饲用价值高，是一种适宜在甘肃中部地区推广种植的优良牧草新品系。

Abstract:

Setaria viridis Songming is a newly developed high-yielding and superior cultivar resulting from years of domestication and artificial selective breeding.【Objective】 To investigate the growth traits and productivity of the new strain Setaria viridis Songming.【Method】 A cultivar comparison trial was conducted at the Dawashan ex perimental station in Lanzhou，Gansu Province，using wild setaria viridis in Gansu，Setaria sphacelata and the Setaria viridis Songming initial population as controls.【Result】 The Setaria viridis Songming strain exhibited superior mor phological characteristics，forage quality，and productivity compared to the control cultivars. Specifically，its mean plant height，dry matter yield，and seed yield were 1. 75 m，18，200. 85 kg/hm2，and 298. 41 bkg/hm2，respectively， significantly higher than those of wild setaria viridis in Gansu and the Setaria viridis Songming initial population，re spectively （P＜0. 05）. Mean leaf length，width，and spike diameter were 44. 63 cm，1. 67 cm，and 1. 95 cm，respec tively，significantly differing from wild setaria viridis in Gansu and Setaria sphacelata （P＜0. 05）. The mean stem to-leaf ratio of 0. 18 showed no significant difference from the controls.【Conclusion】 The Setaria viridis Songming strain demonstrates superior adaptability，high yield potential，excellent forage quality and productivity，with superior forage value，rendering it a promising cultivar for promotion and cultivation in central Gansu Province.