Effects of biosolids application on soil chemical properties in peri-urban agricultural systems
The application of biosolids as a fertilizer in agricultural
cultivation are common practices in many countries.
This study investigates the effects of such practices in
field experiments on Fluvisol and Acrisol soils in peri-urban Hanoi City.
We compared biosolidfertilized vegetable/rice-dominated
systems (biosolids applied as chicken manure (Acrisol in Vinh Phuc Province) or
composted pig manure mixed with rice straw (Fluvisol in Ha Tay Province).
The biosolids were applied at six different rates
representing from 0 to 450% of the normal annual dose used by local farmers.
The application of biosolids had highly significant positive
effects on organic carbon (TOC%) and total nitrogen (Ntot%), when the six
different treatments of composted manure and chicken manure were compared.
The soil reverse aqua regia-extractable (Rev Aq Reg) Zn increased
linearly with biosolids application rate at both sites and the linear
regression showed Zn (mg kg-1) = 112.5 + 13.25×10-3×composted manure (t ha-1)
(r2=0.58) or Zn (mg kg-1) = 43.77 + 35.04×10-3×chicken manure (t ha-1)
(r2=0.73), whereas Cu (Rev Aq Reg) only increased significantly at the Vinh
Phuc site.
The Cd and Pb (Rev Aq Reg) concentration is not clearly
different from the control after short-term (one time) application of
biosolids.
The application of biosolids increased the EDTA-extractable
fraction of Cd, Cu and Zn, but had no effect on NH4NO3-extractable fractions of
these elements.
Title:
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Effects of biosolids application on soil chemical
properties in peri-urban agricultural systems
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Authors:
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Keywords:
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Chất rắn;Sinh học;Đất;Hóa học;Ven đô;Sản xuất nông nghiệp
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Issue Date:
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2008
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Publisher:
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VNU
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Citation:
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p. 202-212
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Abstract:
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The application of biosolids as a fertilizer in
agricultural cultivation are common practices in many countries. This study
investigates the effects of such practices in field experiments on Fluvisol
and Acrisol soils in peri-urban Hanoi City. We compared biosolidfertilized
vegetable/rice-dominated systems (biosolids applied as chicken manure
(Acrisol in Vinh Phuc Province) or composted pig manure mixed with rice straw
(Fluvisol in Ha Tay Province). The biosolids were applied at six different
rates representing from 0 to 450% of the normal annual dose used by local
farmers. The application of biosolids had highly significant positive effects
on organic carbon (TOC%) and total nitrogen (Ntot%), when the six different
treatments of composted manure and chicken manure were compared. The soil
reverse aqua regia-extractable (Rev Aq Reg) Zn increased linearly with
biosolids application rate at both sites and the linear regression showed Zn
(mg kg-1) = 112.5 + 13.25×10-3×composted manure (t ha-1) (r2=0.58) or Zn (mg
kg-1) = 43.77 + 35.04×10-3×chicken manure (t ha-1) (r2=0.73), whereas Cu (Rev
Aq Reg) only increased significantly at the Vinh Phuc site. The Cd and Pb
(Rev Aq Reg) concentration is not clearly different from the control after
short-term (one time) application of biosolids. The application of biosolids
increased the EDTA-extractable fraction of Cd, Cu and Zn, but had no effect
on NH4NO3-extractable fractions of these elements.
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URI:
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Appears in Collections:
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