湘中丘陵区27个青贮玉米品种比较试验

Comparison of 27 varieties of silage maize in Central Hunan

为筛选适宜湘中丘陵区推广种植的青贮玉米(Zea mays)品种,本试验比较了27个青贮玉米品种的农艺性状、产量和品质。结果表明:在湘中丘陵区种植青贮玉米能获得较高的生物学产量和营养品质。在生物学产量方面,‘明凤159’、‘SA336’、‘北农青贮356’、‘北农青贮208’、‘利单588’、‘利单389’、‘利单638’共7个品种表现优异,干草产量在20 t·hm^(-2)以上。在品质方面,粗蛋白含量为7.91%~9.06%,中性洗涤纤维含量为40.03%~58.83%,酸性洗涤纤维含量为20.63%~29.90%。通过欧式聚类分析获得4个类群,第I类群6个青贮玉米品种综合性状更好,其中‘利单638’和‘利单588’营养品质更佳,可在湘中丘陵区推广种植。

The yield, agronomic traits, and nutritional qualities of 27 corn(Zea mays) varieties in Central Hunan were evaluated. Results showed that silage corn planted in Central Hunan obtained higher biological yield and nutritional quality.The biomass yields of silage were the highest for accessions ‘Mingfeng159’, ‘SA336’, ‘Beinong356’, ‘Beinong208’,‘Lidan588’, ‘Lidan389’, and ‘Lidan638’, with hay yields above 20 t·ha^(-1). In terms of quality, the content of crude protein(CP) was 7.91%~ 9.06%, neutral detergent fiber(NDF) was 40.03%~ 58.83%, and acid detergent fiber(ADF) was20.63%~29.90%. Four groups were obtained through systematic cluster analysis. The six silage maize varieties in Group 1had best comprehensive traits, of which ‘Lidan638’ and ‘Lidan588’ had better nutritional qualities. This study suggests that they could be popularized in the hilly areas of Central Hunan.