河北坝上地区柠条营养价值分析

Nutrition value analysis on Caragana microphylla Lam. on the plateau of hebei province

随着柠条（Caragana microphylla Lain．）年龄的增长，矿质元素呈下降趋势，家畜生长所必需的粗蛋白、粗脂肪含量也呈下降趋势，而粗纤维含量呈上升趋势，其中3-4a生的柠条变化趋势明显。3a生柠条的矿质元素、粗蛋白、粗脂肪含量从休眠期到开花期呈逐渐增高的趋势，而粗纤维含量从休眠期到开花期明显下降，主要营养成分向有利于家畜利用的方向变化。

Along with the age of the Caragana microphylla Lam., the mineral elements are decreasing and the crude protein and crude fat which are necessary for domestic animals are also decreasing, while the crude fiber content is increasing; the difference between the 3 - year- old Caragana microphylla Lain. and the 4 - year- old one is obvious. The mineral elements, the crude protein and the crude protein content of the 3 - year- old Caragana microphylla Lain. are increasing from the dormant period to the flowering period, while the crude fiber is decreasing. The main nutrition elements have a favorable tendency for the need of domestic animals.