【摘要】 高粱与苏丹草杂种优势明显 ,F1 单株生物产量性状高于双亲平均值 ,甚至超过或接近高亲。影响高粱 苏丹草杂交种单株茎叶鲜重的主要因素是主茎粗、叶长 ;决定单位面积鲜草产量的主要是密度、叶长和单株茎叶鲜重。多年随机区组试验结果表明 ,杂交种单位面积鲜草产量显著超过苏丹草 ,并以 30万株 hm2 为最适种植密度。杂交种营养品质与苏丹草相近 ,氰化物含量低 ,在孕穗后期含糖量达到最大值为 1 0 0 % (Bx)。更多还原

【Abstract】 The morphological characteristics, heterosis and the forage value of hybrid between sorghum [ Sorghum bicolor (L ) Moench] and sudangrass[ Sorghum sudanense (Piper) Stapf] were studied The results showed that the hybrid vigor was obvious, higher than mid parent, even higher than the high parent in leaf width, leaf length, plant height, tiller and fresh weight per plant Main stem diameter and leaf length had strong direct effects on fresh weight per plant, and the same was true for density, leaf length and weight per plant on yield per unit area The forage yield of the hybrid was higher significantly than that of sudangrass The best density suitable for the hybrid was 30×10 4 plants/hm 2 The nutrient level of the hybrid was close to that of sudangrass CN - content in the hybrid was lower Sugar content was 10 0%(Bx) at later stage of booting, and it was higher than other developmental stages更多还原