我国畜禽饲料资源中微量元素铜含量分布的调查
王丽赛,张丽阳,邵玉新,马雪莲,王良治,邢冠中,杨柳,李素芬,吕林,廖秀冬,罗绪刚

A Survey on Distribution of Copper Contents in Feedstuffs for Livestock and Poultry in China
WANG LiSai,ZHANG LiYang,SHAO YuXin,MA XueLian,WANG LiangZhi,XING GuanZhong,YANG Liu,LI SuFen,LÜ Lin,LIAO XiuDong,LUO XuGang
表5 牧草类饲料中铜含量分布(风干基础)
Table 5 Distribution of Cu contents in pasture ingredients (air-dry basis)
样品名称
Name of samples
省(市、区)数
No. of provinces
(municipalities, regions)
样品数
No. of samples
铜含量Cu contents (mg·kg-1)
平均值±标准差
Mean ± standard deviation
中位数
Median
众数
Mode
羊草 Leymus chinensis 7 35 4.31±1.51b 3.74 2.81
黑麦草 Ryegrass 16 72 7.97±3.39a 7.70 8.59
苜蓿 Alfalfa 25 93 9.20±1.88a 8.96 7.12
青贮玉米 Corn silage 23 88 9.92±2.46a 8.77 7.75
PP-value <0.001
总平均值 Total average 7.85