Water saving irrigation improves the solubility and bioavailability of zinc in rice paddy. | [International Journal of Agriculture and Biology • 2015]

Author(s):

1. Junzeng Xu: State key Laboratory of Hydrology-water Resources and Hydraulic Engineering, Hohai University, Nanjing, China ;College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, China

2. Yuping Lv: College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, 210098, China

3. Shihong Yang: State key Laboratory of Hydrology-water Resources and Hydraulic Engineering, Hohai University, Nanjing, China ;College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, China

4. Qi Wei: College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, 210098, China

5. Zhenfang Qiao: College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, 210098, China

Abstract:

Fields experiment was done to investigate the effect of a typical water saving irrigation technique, namely non-flooding controlled irrigation (NFI), on the extractability, solubility, and bioavailability of zinc (Zn) in a non-polluted paddy soil. The Zn contents in the soil solutions, soil extractions by modified BCR (European Community Bureau of Reference) sequential extraction procedure, and the plant digestions were measured. Compared with the Zn in flooding irrigation (FI) soil, Zn contents in extractable (EXT) form and Zn contents in soil solutions was increased in 0–20 cm NFI soil, accompanied with a little reduction of soil Zn in oxidizable (OXD) form. That confirmed the Zn in OXD form was released into soil solution under the wetting-drying cycle condition in NFI fields, and hence resulted in high extractability and solubility of Zn in top surface soil. As a result, Zn contents in the rice plant parts in NFI fields were higher than in FI fields. It can be concluded that NFI irrigation is help to enhance soil Zn bioavailability and food Zn nutrients status in the soil without Zn-pollution and Zn deficiency, but might led to soil Zn depletion in Zn deficient soil or rice foodstuffs pollution in Zn-polluted soil.

Page(s): 1001-1006

DOI: DOI not available

Published: Journal: International Journal of Agriculture and Biology, Volume: 17, Issue: 5, Year: 2015

Keywords:

Keywords are not available for this article.

References:

References are not available for this document.

Citations

Citations are not available for this document.

Citations

Downloads

Views