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首页> 外文会议>Meeting of the European Association for Research on Plant Breeding Fodder Crops and Amenity Grasses Section >Variation of Cell Wall Digestibility in Fodder Grasses with Particular Focus on a Perennial Ryegrass Breeding Pool
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Variation of Cell Wall Digestibility in Fodder Grasses with Particular Focus on a Perennial Ryegrass Breeding Pool

机译：饲料草细胞壁消化率的变异特别关注多年生黑麦草育种池

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摘要

Improved digestibility of neutral detergent fibre (NDFD) of fodder grasses may contribute to a higher dry matter intake and a better grass protein use efficiency by the ruminant. We determined NDFD of several fodder grass species (perennial and Italian ryegrass, meadow and tall fescue, cocksfoot and timothy) and families of a perennial ryegrass breeding pool by NIRS (near infrared reflectance spectroscopy). Among the grass species, perennial ryegrass had the highest and timothy the lowest mean annualcell wall digestibility. Tetraploid ryegrass varieties showed a higher NDFD than diploids. The variation of the NDFD among families of perennial ryegrass is similar to the variation of the organic matter digestibility (OMD) but much lower than the variation of the content of water soluble carbohydrate (WSC). The mean annual NDFD is significantly correlated with the NDFD of all single cuts but best with the NDFD of the last cut which also showed the largest variation. NDFD is positively correlated withOMD and negatively with the dry matter content. There was no correlation with WSC content. Because of the low variation of NDFD among families of perennial ryegrass when frequently cut, selection for higher digestibility by increasing NDFD will be hard.
机译：改善饲料草的中性洗涤剂纤维（NDFD）的消化率可能导致更高的干物质摄入和通过反刍动物的更好的草蛋白使用效率。我们确定了几种饲料种类（多年生和意大利黑麦草，草甸和高高的Fescue，Cocksfoot和Timothy）的NDFD，NIRS（近红外反射光谱近期）常年黑麦草育种池。在草地中，多年生黑麦草具有最高，蒂莫西最低的平均年度壁消化率。四倍体黑麦草品种表现出比二倍体更高的NDFD。多年生黑麦草家族中NDFD的变异类似于有机物质消化率（OMD）的变异，但远低于水溶性碳水化合物（WSC）的含量的变化。平均年度NDFD与所有单次削减的NDFD显着相关，但最佳的最后一个剪辑的NDFD也显示出最大的变化。 NDFD与干物质含量呈正相关。没有与WSC内容的相关性。由于当经常切割时多年生黑麦草家族的NDFD的低变化，通过增加NDFD来选择更高的消化率将是难的。

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