Abstract:The concentrations of Cr, Cu, Pb, Zn in livestock manures and feeds from livestock farm concentrated regions in Guanzhong Plain were determined to evaluate the heavy metal accumulation rates and the manure safe service period. The results indicated that 7.69%, 4.35% and 8.00% of cattle, chicken and pig manure samples were out of limit on Cr, respectively, moreover, 76.00% and 8.00% samples of pig manure exceeded the limits of Cu and Zn, respectively. The concentrations of Cu and Zn in livestock feeds were more than those of Cr and Pb, and had a significantly positive correlation between those in manure. The principal component analysis results showed that the Cu and Zn in manure primarily derived from livestock feeds. The morphological analysis of Cu and Zn showed that the availability of Cu and Zn in manure were very high, especially in chicken manure. The concentrations of Cu and Zn in greenhouse soil would exceed the safe limits from soil background values in 24.4~131.0and 69.7~91.9years under the manure fertilization situation, respectively. As a result, it’s urgent to control the manure overuse in agriculture and reduce the addition of Cu and Zn in livestock feeds.