Heavy metals in a leached smolnitza after long-term fild trials
2000
Fajtondzhiev, L. | V"lev, V. (Institut po Pochvoznanie i Agroekologiya "N. Pushkarov", Sofia (Bulgaria))
Soil (leached smolnitza) of Bozhourishte in the Sofia plant from long-term (more then 25 years) fertilizing trials are studied. The fertilizing treatment are as follows: N18P0K0, N18P16K0 and N18P24K0, where: N18 is 180 kg N/ha, K0 - 0 kg K2O/ha, P0, P16, P24 are respectively 0, 160 and 240 kg P2O5/ha. The result obtained and their statistical evaluation do not show an effect of the long-term fertilization on the soil total content of the studied heavy metals and arsenic. Also, these results do not show an obvious pollution from the big sources of airsol pollution with Pb, Cd, As, etc., which are situated in the Sofia plain. The soil total content of the studied elemrnts are as follows in mg/kg: Cu - 41, Zn - 91, Ni - 30, Cr - 73, Co - 21, Pb - 31, As - 7,9, Cd - 0,06, Mn - 1250. Fe and Al in % are respectively 4,5 and 5,7.
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Este registro bibliográfico ha sido proporcionado por Institute of Agricultural Economics