摘要
以4种野生豆科牧草苦豆子（Sophora alopecuroide）、线叶野豌豆（Vicia tenuifolia）、光果甘草（Glycyrrhizae glabrae）、罗马苜蓿（Medicago romanica）种子为研究对象,测定各种子在绵羊消化道作用前后的形态、生物学特性变化以及在绵羊消化道内的运移和排放规律。结果表明,4种种子排放过程均符合高斯模型,且苦豆子、线叶野豌豆、光果甘草排放峰值均出现在饲喂后24~36h,罗马苜蓿种子排放峰值则出现在18~30h。苦豆子、线叶野豌豆、光果甘草和罗马苜蓿种子总回收率分别为14.513%、4.463%、10.811%、4.608%,在绵羊消化道内的平均滞留时间分别为36.3、29.6、31.2和31.9h。除苦豆子外,其它3种植物种子在经过消化道后单粒重显著降低（P〈0.05）,4种种子消化后的形状指数较经过消化道前显著减小。经过绵羊消化道后种皮颜色加深,纹理模糊,出现褶皱及明显侵蚀斑。与经过消化道前比较,4种植物种子经过消化道后的发芽率均有显著提高,其中发芽率提高效果最明显的时间段在消化24~48h后。消化道作用可有效打破苦豆子、线叶野豌豆、光果甘草、罗马苜蓿种子的硬实,4种植物种子均可通过绵羊消化道传播。
Seeds were collected from four Leguminous plant species （Sophora alopecuroide, Vicia tenuifolia, Glycyrrhizae glabrae, Medicago romanica） and fed to sheep, then recorded the seeds recovery rates and mean retention time after digestion. Determined the morphological and biological characteristics and germinability of seeds before and after digestion. The results showed that many seeds were excreted from sheep digestive tract, and excretion dynamic all fitted Gaussian model, excretion peak of S. alopecurolde, V. tenuifolia, G. glabrae appeared 24-36 h after digestion, but that of M. romanica appeared 18-30 h after digestion. Total recovery rate from feces of four plants species seeds was 14.513%（S. alopecuroide）, 4.463% （V. tenuifolia）, 10.811% （G. （2-labrae） , 4.608% （M. romanica ） , respectively. Mean retention time of S. alopecuroide , V. tenui folia , G. glabrae and M. rornanica was 36.3, 29.6, 31.2, 31.9 h, respectively. Seed weight decreased significantly （P〈0.05） after digestion except for S. alopecuroide, seed shape index of all species decreased. The color of seed coat was deepened, seed surface texture was indistinct, and appeared wrinkles and obvious erosion after digested obviously. The germination rates of seed increased after digestion and the highest germination rate appeared in 24-48 h after digestion. Gastrointestinal tract of sheep can break hard seeds and provide a good pathway for seed dispersal.
出处
《草业科学》
CAS
CSCD
北大核心
2016年第8期1566-1573,共8页
Pratacultural Science
基金
国家自然科学基金(31360568
31560659)
石河子大学国家级大学生创新创业训练计划项目(201410759069)
关键词
豆科种子
形态学特征
消化
发芽率
Leguminous plant seeds
morphological characters
digestion
germination rate
