[Effect of Shajiang black soil amended by coal fly ash on ecological factors and residue of heavy metal in wheat field].
The effect of Shajiang black soil amended by coal fly ash on ecological factors in wheat field and residua of Cd, Cr, Pb, Hg and As were studied by pot experiment. The results showed that applying coal fly ash into Shajiang black soil could decrease soil density, soil proportion and clay content, but increase soil porosity, filtration coefficient and soil temperature. Moreover, it could promote water evaporating when soil moisture was high and keep soil water when lower than 10%. It also could facilitate activity of soil micro-organism and promote soil nutrient transforming. With (6-18) x 10(4) kg.hm-2 coal fly ash applied in Shajiang black soil, the accumulated quantity of Cd, Cr, Pb, Hg and As in soil and in wheat grain were lower than international standard index of pollution. Therefor, Shajiang black soil amended by coal fly ash was safe and reliable within the above range.
Ma
X
X
Agronomy College of Henan Agricultural University, Zhengzhou 450002. mxmwxc@public2.zz.ha.cn
Wang
X
X
Ding
J
J
Gao
E
E
Yang
Q
Q
D003031:Coal; D004463:Ecology; D019216:Metals, Heavy / Q000032:analysis*; D012987:Soil / Q000032:analysis; D014908:Triticum / Q000502:physiology*; D014867:Water / Q000032:analysis
D003031:Coal; D019216:Metals, Heavy; D012987:Soil; D014867:Water