苦豆子和玉米秸秆的混合青贮

Fermentation quality and content of poisonous substances in Sophora alopecuroides and corn straw mixed silage

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.