6种优势固沙植物饲用养分含量及动态研究  

Study on nutrition and the dynamics of nutrient of 6 species sandy-fixing plants

作　　者：闫志坚[1] 高雪峰 高天明[3] 

机构地区：[1]中国农业科学院草原研究所 [2]内蒙古家畜改良站 [3]内蒙古大学生命科学学院

出　　处：《饲料工业》2007年第11期19-23,共5页Feed Industry

基　　金：内蒙古人才基金项目(2005rcjj16)

摘　　要：6种优势固沙植物粗蛋白质和氨基酸含量丰富,适宜于家畜饲养的要求,是我国西部沙区发展草地畜牧业的优质饲草资源。3种岩黄芪全株及新生枝条以生长初期营养价值最高,随着植物的生长发育,粗蛋白质、磷元素含量下降,纤维性物质(酸性洗涤纤维、中性洗涤纤维)则随着植物的生长发育而增加。岩黄芪属植物钙含量在生长季节递增,呈浓缩型;磷含量递减,呈稀释型。钙磷比呈增大趋势,在果后营养期超出7:1的家畜耐受极限,因此在饲料配制时应添加适量的磷以调节其钙磷比。3种岩黄芪的粗蛋白质、酸性洗涤纤维、中性洗涤纤维、钙、磷含量均呈现明显的季节性变化规律,从家畜的营养、生物量和采收加工等综合因素考虑,采收季节以6月底～7月中旬为宜。The six species of sand-fixing plants are not only rich in nutrients and amino acid, meeting the requirements of raising livestock, but also the good feed resource for developing husbandry in sandy areas. The three species of Hedysarum L and their new branches have its highest nutritious value in their early growth, but gradually the amount of the protein and phosphorus will decrease. On the contrary, their fiber material will increase with the growth. The calcium content in Hedysarum L increases in time of growth, showing in dense form. The ratio between calcium and phosphorus tends to increase, which goes 7 ： 1 times beyond the limit of livestock＇s endurance, so when making feed, it is necessary to add moderate amount of phosphorus to balance the ratio. There are obvious seasonal changing rules in content of protein, ash content, acid washing fiber, medium washing fiber, calcium and phosphorus, so the best harvest time should be from the end of June to the middle of July considering its nutrition, biological biomass and other factors.

关 键 词：固沙植物 营养成分 动态变化 饲用养分 

分 类 号：S816.11[农业科学—饲料科学]