[Cadmium accumulation and its development tendency in black soil under long-term fertilization].
Based on the long-term field experiment at Hailun Agro-ecosystem Experimental Station of Chinese Academy of Sciences, this paper studied the cadmium (Cd) accumulation, its development tendency, and Cd availability in black soil under effects of long-term application of chemical N and P fertilizers and pig manure. The results showed that under no fertilization, soil Cd concentration had a slight increase. Long-term chemical N and P fertilization increased soil Cd concentration significantly, but soil Cd accumulation had less difference under different N and P fertilization rates. Applying pig manure increased the Cd accumulation in soil significantly, and the accumulation had a tendency of speed-up. Cd-containing feedstuff additives could be the important source of Cd in pig manure. No significant effects of chemical N and P fertilization were observed on the Cd availability in soil, but long-term application of pig manure increased the Cd availability significantly.
Tan
Chang-yin
CY
Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China. changyintan@yahoo.com
Wu
Long-hua
LH
Luo
Yong-ming
YM
Xu
Jian-ming
JM
Han
Xiao-zeng
XZ
Qiao
Yun-fa
YF
D000383:Agriculture / Q000379:methods*; D002104:Cadmium / Q000032:analysis*; D002681:China; D018556:Crops, Agricultural / Q000254:growth & development*; D005308:Fertilizers; D008372:Manure; D012987:Soil / Q000032:analysis; D012989:Soil Pollutants / Q000032:analysis*; D013997:Time Factors
D005308:Fertilizers; D008372:Manure; D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium