Objectives

2

The content of trace elements including copper and zinc in the additives of premixed feed for livestock and poultry livestock in Qujing City

Yunnan Province was analyzed to judge whether their addition and use comply with national standards.

Methods

2

56 batches of additives of premixed feed for livestock and poultry including piglets and weaned piglets

sows

growing-fattening pigs

poultry

cattle (sheep) and other different types in Qujing City were randomly sampled from 2020 to 2024. The content of copper and zinc in the samples collected was determined with reference to GB/T 13885－2017 "

Determination of the content of Calcium

Copper

Iron

Magnesium

Manganese

Potassium

Sodium

and Zinc in Feed-Atomic Absorption Spectroscopy

Method

2

". The results of determination were judged based on the labelled values in accordance with GB/T 18823－2010 "

Allowable Error for Determination of Feed Test

Results

2

".

Results

2

The content of copper and zinc in 1 batch of growing-fattening pigs was unqualified

with a failure rate of 4.3%. 1 batch of poultry contained unqualified content of copper and zinc

with a failure rate of 14.3%.

Conclusions

2

The situation of excessive addition of copper and zinc in the additives of premixed feed for livestock and poultry in Qujing City

Yunnan Province still exists. In the future

it is necessary to increase efforts of sampling and effectively supervise the compliance of enterprises and farmers in adding the copper and zinc to the additives of premixed feed for livestock and poultry.