8个牧草品种饲草能值分析与评价

Energy Value Analysis and Evaluation on Eight Forage Varieties

对青海省境内的糙毛鹅观草、直穗披碱草、林西直穗鹅观草、同德贫花鹅冠草、加拿大披碱草、青海草地早熟禾、同德小花碱茅、吉农无芒雀麦8个牧草品种饲草的能值、消化能、代谢能及营养成分进行分析。结果表明,8个牧草品种饲草营养成分具有粗蛋白、粗脂肪、无氮浸出物含量高和粗纤维含量低的特点;其能值差异不大。糙毛鹅观草、直穗披碱草、林西直穗鹅观草、同德贫花鹅冠草4个牧草品种的消化率低于其他4个牧草品种。同德小花碱茅代谢能最高,为(8.91±0.20)MJ/kg;糙毛鹅观草代谢能最低,为(6.37±0.20)MJ/kg。从研究结果来看,营养成分结构和能值等的特点均与生产实际相吻合。

In the present study, the energy value, digestible energy, metabolizable energy and nutritional components of 8 forage varieties, including Roegneria hirsuta, Elymus nutans, Roegneria turczaninovii, Elymus breviaristatus, Elymus canadensis, Poa pratensis, Puccinellia tenuiflora, Bromus inermis（Jinong） cultivated in Qinghai were analyzed. The results showed that the all of the 8 forage varieties had higher content of crude protein, crude fat, and nitrogen-free extract and had low content of crude fiber.No obvious differences were observed in energy value between the 8 forage varieties. The digestibility of Roegneria hirsute,Elymus nutans, Roegneria turczaninovii and Elymus breviaristatus was higher than the other 4 varieties. The highest and lowest digestible energy was observed in Elymus breviaristatus [（8.91 ±0.20）MJ/kg] and Roegneria hirsuta [（6.37 ±0.20）MJ/kg],respectively. The combined data showed that the features of nutrient components structure and energy value of the 8 forage varieties in accordance with the actual production.