|Table of Contents|

THE GROWTH OF AGROPYRON ELONGATUM IN AN ARTIFICIAL SOIL MIX WITH COAL FLY ASH AND SEWAGE SLUDGE(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
1997 03
Page:
230-235
Research Field:
Publishing date:

Info

Title:
THE GROWTH OF AGROPYRON ELONGATUM IN AN ARTIFICIAL SOIL MIX WITH COAL FLY ASH AND SEWAGE SLUDGE
Author(s):
Su Dechun Zhang Fusuo J. W. C. Wong
1. College of Resourec & Environment, China Agricultural University, Beijing 100094;
2. Departmetn of Biology, Hong Kong Baptist University, Kowloon Tong. Hong Kong
Keywords:
sewage sludgecoal fly ashAgropyron elonatum
CLC:
-
PACS:
DOI:
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DocumentCode:

Abstract:
A greenhouse experiment was performed to evaluate the feasibility of using an artificial soil medium produced with alkaline coal fly ash and sewage sludge for the growth of Agropyron elongatum (Tall wheat grass). Sludge was amended with ash at an application rate of 0.5%, 10%, 35% and 50% (w). Each mixture was then mixed with a loamy soil at either 1:1 or 1: 5 (Ψ)and incubated under greenhouse condition for 3 weeks prior to plant growth experiment. Addition of the ash-sludge mixture significantly improved the dry weight yields of A. elongatum Pots with 10% ash amended sludge at 1: 5 ()soil miring ratio had the highest yield while those with 10% and 35% ash-sludge amendment at 1:1 ()soil mixingratio had lower dry weight yields, but was still higher than that of the control with fertilizer treatment. No deficiency in N and P was noted for the ash-sludge amended pots at both 1: 1 and 1: 5. In shoot tissue Ca,Mg and B Concentrations (w/% or w/mg. kg-1) increased while K, Fe, Mn and Zn decreased with an increase in ash amendment rate. In root tissue Fe, Mn, Cu and Zn contents were significantly higher than those shoot tissue. hence, no excessive accumulation of heavy metals was observed from the ash-sludge amendment. The dry weight yields were improved even at a high amendment rate of 35% ash-sludge mixture at 1:1 V/V soil mixing ratio.

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