Effects of Long-term Irrigation of Livestock Farm Wastewater on Nutrients and Heavy Metals in Agricultural Soils
DAI Ting
ZHANG Ming-kui
Abstract：Sixteen sites of agricultural fields,including 7 paddy fields and 9 vegetable fields,were selected for studying the effects of long-term irrigation of livestock farm wastewater on soil quality.At each of 16 sites,soil samples were collected from both agricultural fields with and without irrigation of livestock farm wastewater.pH value,and concentrations of organic C,total N,total P,total K,NH_4~+-N,NO_3~--N,available P,available K,dissolved salt,and heavy metals (Cu、Zn、Pb、Cd、As、Hg、Cr and Ni) in the soils were measured.The results showed that long-term irrigation of livestock farm wastewater,the concentrations of organic total N,total P,total Cu,total Zn,total As,total Cd,salt,NH_4~+-N,NO_3~--N,available P,available K increased significantly.However,there is no significant effect on soil pH,total K,total Pb,total Ni,total Cr and total Hg.The effects were more significant in vegetable fields than paddy fields.The irrigation also increased vertical transfer of NH_4~+-N,NO_3~+-N,available P in soil profiles,the concentrations of NH_4~+-N,NO_3~+-N,available P in 20～60 cm depth were significantly higher in the fields with irrigation of livestock farm wastewater than those without the irrigation.
Keywords：farm wastewaterirrigationsoil nutrientsheavy metalsaccumulation
Publication Date：2010-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：4( 36-39 )