Effects of Different Water Managements on Yield and Cadmium Accumulation in Rice

Abstract:

Water management affects the bioavailability of cadmium (Cd) in the soil and hence their accumulation in rice and grain yields. A pot experiment was carried out to investigate the effects of different water managements (flooding, intermittent irrigation and aerobic) on rice yield and cadmium accumulation in rice plants growing on cadmium contaminated soil. The results showed that compared to the flooding and aerobic treatment, the intermittent irrigation increased grain yield by 7.55-29.58%, which contributed to the increase of seed setting rate and panicle number. Compared with the intermittent irrigation, aerobic treatment significantly increased Cd contents in roots, straw and grains, while flooding reduced the Cd contents in rice. Compared with flooding, both aerobic and intermittent irrigation enhanced Cd distribution in the root and reduced it in the straw and grain. With increasing irrigation from aerobic to flooded conditions, the soil available Cd concentrations decreased significantly. The patterns of soil pH change were just opposite to those of soil available Cd. Thus, intermittent irrigation could increase rice yield and also reduce Cd in the grain.

• Periodical: Advanced Materials Research (Volumes 1073-1076)
• Pages: 248-252
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1073-1076.248
• Online since: December 2014
• Authors: Yin Fei Lv, Yan Fang Ren, Dong Liu, Yan Chao Zhang, Jun Yu He*
• Keywords: Accumulation, Cadmium, Rice, Water Management

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