间作行宽对玉米、高丹草青贮品质的影响

Effects of intercropping row widths on silage quality of maize and sorghum hybrid sudan grass

摘要:

为探究间作行宽对玉米和高丹草青贮营养品质和发酵品质的影响，以玉米和高丹草宽行(6∶ 12)、中行(4∶8)和窄行(2∶4)种植模式下的材料为研究对象，以其单播为对照，在蜡熟期进行刈割及青贮发酵处理，青贮 60 d 后，测定其营养成分及发酵指标。结果表明：在宽行种植模式下，玉米青贮后中性洗涤纤维含量较对照降低了 5. 4%，泌乳净能提高了 2. 4%，高丹草青贮后粗蛋白含量较对照提高了 10. 8%，乙酸含量较对照提高了 480%；在中行种植模式下，玉米青贮后泌乳净能较对照降低了 1. 9%， 高丹草青贮后粗蛋白含量较对照提高了 7. 0%，泌乳净能较对照降低了 0. 8%；在窄行种植模式下，玉米青贮后可溶性糖含量较对照提高了 27. 6%，乳酸含量较对照提高了 49. 2%。高丹草青贮后干物质含量较对照降低了 1. 0%，泌乳净能较对照提高了 0. 8%。经灰色关联度综合分析表明，玉米在窄行种植模式下青贮品质最好，高丹草在中行种植模式下青贮品质最好。

Abstract:

To explore the effects of planting patterns on the nutritional quality and fermentation quality of maize and sorghum hybrid sudan grass，the nutritional quality and fermentation quality of corn and grass silage were studied by using wide，medium and narrow planting patterns，cutting at the waxing stage and silage fermentation. The results showed that the content of NDF in corn silage was reduced by 5. 4% and lactation net energy was increased by 2. 4% in the wide-row planting mode. The content of crude protein and acetic acid in silage were increased by 10. 8% and 480%，respectively. Under the middle -line planting model，the lactation net energy of corn silage was decreased by 1. 9% compared with the control. The content of crude protein in silage was increased by 7. 0% and lactation net energy decreased by 0. 8%. In the narrow - row planting mode，the soluble sugar content and lactic acid content of corn silage increased by 27. 6% and 49. 2%，respectively. The content of dry matter in silage was reduced by 1. 0% and lactation net energy was increased by 0. 8%. The grey relational analysis showed that the silage quality of maize was the best in the narrow-row planting mode， and that of Sorghum hybrid Sudan grass was the best in the middle-row planting mode