摘要
Samples of leaves, flowers and fruits of four browse species were collected from uplands in the province of León (northwestern Spain) at different sampling times (from spring till autumn). The browse species were Erica australis (Spanish heath), Cistus laurifolius (laurel-leaved rock rose), Quercus pyrenaica (hoary oak) and Rosa canina (wild dog rose). A large variability in chemical composition and in vitro digestibility and gas production kinetics was observed among species and among sampling times within each species. The ranking order of the browse plants according to their in vitro digestibility and gas production kinetics was R canina > Q pyrenaica > C laurifolius > E australis. In the leaves of R canina and Q pyrenaica, crude protein content, digestibility and parameters of gas production tended to decrease throughout the growing season (P < 0.05 in most cases), whereas cell wall contents followed the opposite trend. Seasonal variations were less pronounced in the other browse species. There were significant (P < 0.05) correlations between in vitro digestibility and chemical composition of the browse plants, positive with the crude protein content and negative with the fibre fractions. Copyright © 2004 Society of Chemical Industry
摘要译文
从西班牙西北部的莱昂省，从不同的采样时间（从春季到秋季）采集了四种浏览物种的叶，花和果实的样本。浏览物种是埃里卡澳大利亚（西班牙荒地），Cistus laurifolius（月桂叶岩玫瑰），栎pyterica（白橡木）和罗莎canina（野狗玫瑰）。化学成分和体外消化率和气体生产动力学的巨大变化在物种之间以及在每个物种的采样时间之间被观察到。浏览植物根据其体外消化率和产气动力学的排序顺序是R canina Q pyrenaica C laurifolius E australis。R canina和Q pyrenaica叶片粗蛋白质含量，消化率和产气参数在整个生长季节呈下降趋势（大多数情况下P 0.05），而细胞壁内容则遵循相反的趋势。其他浏览物种的季节变化不太明显。有显着性（P 0。05）浏览植物的体外消化率和化学组成之间的相关性，粗蛋白质含量为阳性，纤维组分为阴性。版权所有©2004化学工业协会
Hajer Ammar, Secundino López[*]; Jesús S González and María J Ranilla;. Chemical composition and in vitro digestibility of some Spanish browse plant species[J]. Journal of the Science of Food and Agriculture, 2004,84(2): 197-204