Effect of water treatment sludge on growth and elemental composition of tomato(Lycopersicon esculentum)shoots1
作者:
HerschelA. Elliott,
LeslieM. Singer,
期刊:
Communications in Soil Science and Plant Analysis
(Taylor Available online 1988)
卷期:
Volume 19,
issue 3
页码: 345-354
ISSN:0010-3624
年代: 1988
DOI:10.1080/00103628809367943
出版商: Taylor & Francis Group
关键词: water treatment sludge;liming substitute;struvite;Lycopersicon esculentum
数据来源: Taylor
摘要:
The impact of a water treatment sludge on the fertility of a silt loam soil was assessed by monitoring the yield and elemental composition of tomato(Lycopersicon esculentum) shoots in a greenhouse study. Application of sludge at rates from 2–10% (air dry weight basis) raised the soil pH from 5.3 to 8.0 which enhanced plant growth. A substantial reduction in metal (Cd, Zn, Cu, Ni) uptake was observed with sludge amendments, even at the highest rates. The alkaline nature of this sludge (pH=9.3, calcium carbonate equivalence=53%) suggests its potential use as a liming material for agricultural soils. Overly alkaline conditions should be avoided however, as high application rates combined with ammonia fertilization had an antagonistic effect on plant growth, possibly from P deficiency induced by struvite (MgNH4PO4) formation.
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