云南冬闲田种植牧草主要农艺性状与生产性能的灰色关联度分析

Relational Grade Analysis of Grey Theory between Main Agronomic Characteristics and Productive Performance of Forage Planted in Winter Free Farmland

为筛选最适宜在云南亚热带地区冬闲田种植的优良牧草品种,应用灰色关联度分析研究了生长在云南亚热带地区冬闲田的24个牧草品种的生产性能。结果表明:农艺性状中根系入土深度对的贡献最大,其次是株高和茎叶比,鲜干比贡献最小。筛选出兰天堂多花黑麦草综合性状最好,生产性能最优,其次是海湾多花黑麦草、环峡南苜蓿、特高多花黑麦草、邦德多花黑麦草。这些牧草可在云南亚热带地区冬闲田广泛推广应用。

Relational grade analysis of grey theory was used to study the productive performance of forage planted in the winter free farmland of Yunnan subtropics. The results showed that length of root had the highest effect on hay grass yield, plant height and stem-leaf ratio was secondary, fresh weight/dry weight ratio had the least effect. And Lolium multiflorum cv. Blue Heaven had good complex character and supe-riority in relative herbage yield potential. Lolium. multiflorm cv. Gulf, Medicago polymorpha cv. Circle valley, Lolium multiflorum cv. Tet-ragold, Lolium multiflorum cv. Abundant were secondary. These forages could deserve to be extended and applied in the winter free farmland of Yrmnan subtropics.