APPLICATION OF ANAEROBIC DIGESTED RESIDUES ON SAFE FOOD PRODUCTION

Experiments were conducted in pot culture and field plots to study the effects of Anaerobic Digested Residues (ADR) on nitrate accumulation in leaf vegetables, which is critical for the safety of food. The results showed that compared to chemical fertilizer, ADR could decrease the nitrate accumulati...

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Published in:Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering Toxic/hazardous substances & environmental engineering, 2002-01, Vol.37 (4), p.725-735
Main Authors: Shi, Ya-juan, Lu, Yong-long, Liang, Dan
Format: Article
Language:English
Subjects:
Anaerobic digested residues
Bacteria, Anaerobic - physiology
Biogas
Cultivation
Fertility
Fertilizers
Fertilizing
Food Contamination
Foods
Gases
Leaf vegetable
Nitrate
Nitrates
Nitrates - pharmacokinetics
Nitrogen - pharmacokinetics
Plant Leaves - chemistry
Rape
Residues
Safe food
Safety
Soil Pollutants - pharmacokinetics
Spinach
Spinacia oleracea
Spraying
Vegetables - chemistry
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Summary:Experiments were conducted in pot culture and field plots to study the effects of Anaerobic Digested Residues (ADR) on nitrate accumulation in leaf vegetables, which is critical for the safety of food. The results showed that compared to chemical fertilizer, ADR could decrease the nitrate accumulation in rape and spinach. Furthermore, nitrate content in plant tissue was increased with the increase of percentage of chemical nitrogen in the mixture of chemical fertilizer and ADR. A comparison of spraying digested slurry with irrigation showed that spraying method could reduce the nitrate content of rape, however, a reverse result was found in spinach. The nitrate accumulation in rape affected by ADR was more apparent in high fertility soil than that in low fertility one. To regulate the nitrate accumulation in plant, it was more apparent in rape under greenhouse cultivation, while more apparent in spinach under open-air cultivation. The results demonstrated that the ADR was effective in the safe food production and it may convert the technology to be more profitable.
ISSN:1093-4529
1532-4117
DOI:10.1081/ESE-120003250