高寒地区十字花科栽培牧草营养价值评定

Evaluation of nutritional value of cruciferous herbage in alpine region

试验旨在系统评价高原地区十字花科牧草的营养价值。试验以高原地区常见的3种十字花科牧草(华油杂62油菜、饲油2号油菜和芸芥)为研究对象,采用概略养分分析法、体外产气法并结合单位面积产量综合评定。结果显示:饲油2号油菜产草量最高;饲油2号油菜能量最高,华油杂62油菜次之,但华油杂62油菜的粗蛋白含量最高。华油杂62油菜的粗蛋白质(CP)和酸性洗涤纤维(ADF)含量最高,饲油2号油菜次之。3种十字花科牧草pH值及氨态氮(NH3-N)浓度均在正常范围内。饲油2号油菜的乙酸含量最高(25.66 mmol/L),华油杂62油菜次之(23.03 mmol/L),均显著高于芸芥(17.78 mmol/L)(P<0.05)。饲油2号油菜的消化率(IVDMD)显著高于华油杂62油菜和云芥(P<0.05)。研究表明,华油杂62油菜和饲油2号油菜综合生产性能显著优于云芥。

The experiment was to systematically evaluate the nutritional value of cruciferous forage in plateau area. In the study, three kinds of cruciferous herbage(Brassica napus L., Brassica napus L. and Eruca sativa Mill.) commonly cultivated in plateau area were selected as the research objects. The results were evaluated by using the method of general nutrient analysis, in vitro gas production and combined with yield per unit area. The results showed that forage yield of Brassica napus L. was the highest. The Brassica napus L. had the highest energy, followed by Brassica napus L., but Brassica napus L. had the highest crude protein content. The crude protein(CP) and acid detergent fiber(ADF) yields of Brassica napus L. rapeseed were the highest, followed by Brassica napus L. The pH values and ammonia nitrogen(NH3-N) concentrations of the three cruciferous herbage were all within the normal range. The acetic acid content of forage Brassica napus L. was the highest(25.66 mmol/L), followed by Brassica napus L.(23.03 mmol/L), which was significantly higher than that of Eruca sativa Mill.(17.78 mmol/L)(P<0.05). The digestibility(IVDMD) of Brassica napus L.was significantly higher than that of Brassica napus L. and Eruca sativa Mill.(P<0.05). The study indicates that the comprehensive production performance of Brassica napus L. and Brassica napus L. was significantly better than that of Eruca sativa Mill.