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草业科学  2013 

牛粪尿施用时间对多花黑麦草青贮料品质的影响

, PP. 1871-1875

Keywords: 施肥时间,青贮料品质,牛粪尿,多花黑麦草

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Abstract:

?采用小型袋装青贮技术研究不同牛粪尿施用时间与牧草收获时间间隔对多花黑麦草(Loliummultiflorum)青贮料品质的影响。在300m2的多花黑麦草试验地,按45m3·hm-2施用量,分别在青贮原料收获的前10周、6周、2周撒施腐熟牛粪尿,以不施牛粪尿的草地作为对照,牧草收获时记录下不同施肥时间的牧草产量。采用小型青贮袋(500mL)密封青贮各处理样品90d后,分析青贮料的化学成分。结果表明,青贮料的干物质含量为146~165g·kg-1,青贮料品质较差,pH值和氨态氮含量高,乳酸含量低,尤其是第1次收获前2周施用牛粪尿,青贮料中检测到丁酸菌生长迹象,青贮料pH值(4.7)和氨态氮含量(194g·kg-1TN)高,乳酸含量低(89g·kg-1DM)。因此,春季施用牛粪尿会降低青贮料的品质。

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