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作 者:黄晓辉[1] 李树成[1] 李东华[1] 王彦荣[1]
机构地区:[1]草地农业生态系统国家重点实验室兰州大学草地农业科技学院,甘肃兰州730020
出 处:《草业科学》2013年第10期1633-1639,共7页Pratacultural Science
基 金:公益性行业(农业)科研专项课题--低毒饲草饲料的开发与高效利用技术研究与示范(20120304205);兰州大学中央高校基本科研业务费专项资金(lzujbky-2012-95)
摘 要:将苦豆子(Sophora alopecuroides )和玉米(Zea mays)猪杆经过不同混合比例(苦豆子和玉米稽軒鲜质量比分别为10 : 0、8 : 2、6 : 4、4 : 6、2 : 8和0 : 10)青贮,在青贮30、45和60 d后对混贮料的营养成分、发酵品质及总生物碱含量进行测定,旨在寻求能够提高苦豆子和玉米秸秆发酵品质及营养成分,降低苦豆子总生物碱含量的最优混贮比例及青贮时间。结果表明,随着苦豆子在混贮料中比例的升高,各混贮料的pH值、氨态氮/总氮和粗蛋白含量呈增加趋势,乳酸、中性和酸性洗涤纤维含量呈降低趋势,各处理青贮饲料较青贮原料总生物碱含量显著降低(P〈0. 05)。2:8比例青贮品质及降低总生物碱含量效果最佳,使混贮料pH值降至3. 95-4. 01,粗蛋白含量比玉米单贮增加了 52. 98%-64. 69%,总生物碱含量降低了 65. 63 %-66. 41 %。青贮45 d后,随时间延长,青贮品质及总生物碱含量无明显变化。Sophora alopecuroides and corn straw were mixed and silaged at radio of 10 : 0,8 : 2,6 : 4,4:6,2:8 and 0 : 10,respectively. The nutrition composition, fermentation quality and alkaloid contentwere measured after 30,45 and 60 d ensilage, the aim of this study was to seek optimal mixed silage radioand ensiling days of S. alopecuroides and corn straw, improve the fermentation quality and nutrition com-position, and reduce the content of alkaloid. The result showed that with the proportion of S. alopecu-roides increasing, pH, ammonia/total nitrogen and crude protein would increase, while the lactic acid,neutral detergent fiber and acid detergent fiber has a descending trend,the alkaloid content of all mixedsilage was significantly lower (P〈0. 05) than raw material of S. alopecuroides. The mixed silage withS. alopecuroides and corn straw 2 : 8 was best,the pH value was reduced to 3. 95-4. 01 (〈4, 2),the con-tent of crude protein was 52. 98% -64. 69 % higher than that of single corn straw silage, the alkaloid content was 65. 63%-66. 41 % lower than raw material of S. alopecuroides. Ensiling days had no significanteffect on the fermentation quality and content of alkaloid.
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