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Effects of municipal
sewage sludge doses on the yield, some yield components and
heavy metal concentration of dry bean (Phaseolus vulgaris
L.)
Necat Togay*, Yesim Togay and Yusuf Dogan
Yüzüncü
Yıl University, Faculty of Agriculture, Department of Field
Crops, 65080, Van, Turkey.
*Corresponding author. E-mail:
necattogay@hotmail.com. Phone: +90432-2251794. Fax:
+904322251119.
Accepted
29 July, 2008 |
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Significant grain yield increase to applied municipal sewage
sludge was obtained. This study
was carried out in order to investigate the effects
of the different doses municipal sewage sludge application
on the heavy metal concentrations, yield and quality of dry
bean in the 2006 and 2007 years. The trial was conducted in
randomized complete block design with three replications.
Four municipal sewage sludge doses (0, 20 000, 40 000 and 60
000 kg ha-1) were applied. Significantly higher
pod and seed number per plant in municipal sewage sludge
treatments had increasing effects on grain yield. Whereas
grain yield, which was the highest component was obtained
from 60 000 kg ha-1 municipal sewage sludge with
1766.3 kg ha-1 in the first year and with 1881.6
kg ha-1 in the second year. The lowest grain
yield were obtained from 0 kg ha-1 municipal
sewage sludge in both years. 60 000 kg ha-1
municipal sewage sludge application was optimal with respect
to increasing yield and yield characteristics.
Concentrations of heavy metals in grain and shoot were
similar to those in the fertilizer treatments. Cu, Zn, Cr,
Pb and Ni in grain and shoot were well below their toxic
thresholds.
Key
words:
Sewage sludge, heavy metal, yield, dry bean. |
