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Effect of different amendments on rice (Oryza sativa L.) growth, yield, nutrient uptake and grain quality in Ni-contaminated soil
- Source :
- Environmental science and pollution research international. 23(18)
- Publication Year :
- 2016
-
Abstract
- Rice ( Oryza sativa L.) is one of the main staple food crops which is inherently low in micronutrients, especially iron (Fe), and can lead to severe Fe deficiency in populations having higher consumption of rice. Soils polluted with nickel (Ni) can cause toxicity to rice and decreased Fe uptake by rice plants. We investigated the potential role of biochar (BC) and gravel sludge (GS), alone and in combination, for in situ immobilization of Ni in an industrially Ni-contaminated soil at original and sulfur-amended altered soil pH. Our further aim was to increase Fe bioavailability to rice plants by the exogenous application of ferrous sulfate to the Ni-immobilized soil. Application of the mixture of both amendments reduced grain Ni concentration, phytate, Phytate/Fe, Phyt/Zn molar ratios, and soil DTPA-extractable Ni. In addition, the amendment mixture increased 70 % Fe and 229 % ferritin concentrations in rice grains grown in the soil at original pH. The Fe and ferritin concentrations in S-treated soil was increased up to 113 and 383 % relative to control respectively. This enhanced Fe concentration and corresponding ferritin in rice grains can be attributed to Ni/Fe antagonism where Ni has been immobilized by GS and BC mixture. This proposed technique can be used to enhance growth, yield, and Fe biofortification in rice by reducing soil pH while in parallel in situ immobilizing Ni in polluted soil.
- Subjects :
- Crops, Agricultural
Health, Toxicology and Mutagenesis
Iron
Biofortification
Amendment
010501 environmental sciences
complex mixtures
01 natural sciences
Soil
Nutrient
Nickel
Soil pH
Biochar
Environmental Chemistry
Soil Pollutants
0105 earth and related environmental sciences
Oryza sativa
Chemistry
fungi
food and beverages
Agriculture
Oryza
04 agricultural and veterinary sciences
General Medicine
Pollution
Soil contamination
Agronomy
Environmental chemistry
Charcoal
Soil water
040103 agronomy & agriculture
0401 agriculture, forestry, and fisheries
Edible Grain
Environmental Pollution
Sulfur
Subjects
Details
- ISSN :
- 16147499
- Volume :
- 23
- Issue :
- 18
- Database :
- OpenAIRE
- Journal :
- Environmental science and pollution research international
- Accession number :
- edsair.doi.dedup.....1e1786176022a57fcbcf12d9ec09a901