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Proceedings Paper

Effects of tillage on the Fe oxides activation in soil
Author(s): Guangyu Chi; Xin Chen; Yi Shi; Jun Wang; Taihui Zheng
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Paper Abstract

Since mid-1950s, the wetland ecosystems in Sanjiang Plain of Northeast China have been experiencing greater changes in land use, which had negative effects on the soil environments. This study assessed the effects of soil tillage on the activation of soil Fe in the region. The test ecosystems included natural wetland, paddy field and upland field converted from wetland. Soil samples at the depths of 0-10 cm, 10-20 cm, 20-30 cm, 30-40 cm, 40-60 cm, 60-90 cm and 90-120 cm were collected from each of the ecosystems for the analysis of vertical distribution of soil pH, organic carbon, chelate Fe oxides and Fe(II). The results showed that the conversion of wetland into paddy field and upland field induced a decrease of organic carbon content in 0-10 cm soil layer by 61.8% (P <0.05) and 70.0% (P < 0.05), respectively. The correlations among iron forms and soil organic carbon showed that chelate Fe oxides and Fe(II) was correlated positively with soil organic carbon and chelate ratio had a more positive relationship with organic carbon than chelate Fe oxides and Fe(II). The results of chelate Fe oxides, Fe(II) and chelate ratio of Fe suggested that reclamation could prevent the Fe activation and organic matter is credited for having an important influence on the process of Fe activation.

Paper Details

Date Published: 10 July 2009
PDF: 9 pages
Proc. SPIE 7491, PIAGENG 2009: Remote Sensing and Geoscience for Agricultural Engineering, 749112 (10 July 2009); doi: 10.1117/12.836659
Show Author Affiliations
Guangyu Chi, Institute of Applied Ecology (China)
Graduate Univ. of the Chinese Academy of Sciences (China)
Xin Chen, Institute of Applied Ecology (China)
Yi Shi, Institute of Applied Ecology (China)
Jun Wang, Institute of Applied Ecology (China)
Graduate Univ. of the Chinese Academy of Sciences (China)
Taihui Zheng, Institute of Applied Ecology (China)
Graduate Univ. of the Chinese Academy of Sciences (China)


Published in SPIE Proceedings Vol. 7491:
PIAGENG 2009: Remote Sensing and Geoscience for Agricultural Engineering
Honghua Tan; Qi Luo, Editor(s)

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