【摘要】 研究羊草(L eym us ch inensi)、灰色赖草(L eym us cinereu)及其杂种F1生物学特性。结果表明:与双亲相比,杂种F1具有植株高大、叶片宽厚、叶量丰富、生长旺盛和穗粗大等特点;杂种F1的生产性能,特别是叶面积、茎叶比和鲜草产量具有较强的种间杂种优势,超亲优势率分别为50.0%、27.8%和20.9%;分蘖力具有负向超亲优势,负向超亲优势率为5.7%;杂种F1的粗蛋白质、无氮浸出物、粗灰分和C a含量等表现出超亲优势,超亲优势率分别是0.71%、1.00%、22.72%和10.00%。更多还原

【Abstract】 The biological characters of Leymus chinensis and Leymus cinereus and their hybrid were studied. The main results showed that in comparison with parents, the hybrid F₁ had superiority in growth vigour, leaf （width and） length, spike width and length. The heterosis of the hybrid F₁ is evinced by its leaf area, the （ratio of stem） weight and leaf weight and grass yield, and over-high parent heterosis was 50.0%, 27.8% and 20.9% respectively. F₁ is inferior to its parents in tillering ability by 5.7%, while its heterosis exhibits in （crude protein）, nitrogen free extract, crude ash and Ca element, which exceed those of its parentsby 0.71%, （1.0%,） 22.72%, and 10.00%, respectively.更多还原