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| Alkaline slow-release fertilizer decreased rice Cd uptake at Cd-contaminated paddy fields |
| Received:March 23, 2016 |
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| KeyWord:cadmium, alkaline slow-release fertilizer, rice |
| Author Name | Affiliation | E-mail | | TIAN Fa-xiang | Soil and Fertilizer Institute of Hunan Province/Ministry of Agriculture Key Lab of Agri-Environment in the Midstream of Yangtze River Plain, Changsha 410125, China
Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha 410125, China | | | JI Xiong-hui | Soil and Fertilizer Institute of Hunan Province/Ministry of Agriculture Key Lab of Agri-Environment in the Midstream of Yangtze River Plain, Changsha 410125, China
Longping Branch of Graduate School, Central South University, Changsha 410125, China
Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha 410125, China | 1546861600@qq.com | | XIE Yun-he | Soil and Fertilizer Institute of Hunan Province/Ministry of Agriculture Key Lab of Agri-Environment in the Midstream of Yangtze River Plain, Changsha 410125, China
Longping Branch of Graduate School, Central South University, Changsha 410125, China
Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha 410125, China | | | WU Jia-mei | Soil and Fertilizer Institute of Hunan Province/Ministry of Agriculture Key Lab of Agri-Environment in the Midstream of Yangtze River Plain, Changsha 410125, China
Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha 410125, China | | | GUAN Di | Soil and Fertilizer Institute of Hunan Province/Ministry of Agriculture Key Lab of Agri-Environment in the Midstream of Yangtze River Plain, Changsha 410125, China
Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha 410125, China | |
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| Abstract: |
| A field experiment was conducted to study the influences of alkaline slow-release fertilizer(AF) on soil available cadmium(Cd) and rice Cd content in typical Cd-contaminated paddy fields caused by chemical point source pollution(Beishan site), sewage irrigation non-point source pollution(Meilinqiao site) and atmospheric deposition non-point source pollution(Datongqian site) in Chang-Zhu-Tan area. Three treatments were set up at each site, which were conventional fertilization(CK), additional lime application at 1500 kg·hm-2(CKCa) and application of alkaline slow-release fertilizer(AF). The results showed that:The application of AF significantly increased rice yields by 290.8(+3.9%)~605.0(+7.3%) kg·hm-2 in the three experimental sites(Beishan, Meilinqiao, and Datongqiao) with an average increase of 467.8 kg·hm-2(+5.7%,P<0.05) compared with CK treatment; Applications of both lime and AF increased soil pH and reduced soil available Cd contents as compared to the CK treatment, with the effects of lime superior to AF at the three sites; Applications of both lime and AF decreased Cd contents in rice grain and stem at the three sites; AF was superior to lime on decreasing rice grain Cd content at the acidic soil sites(Beishan and Datongqiao) with the rice grain Cd content further decreased by 0.023 mg·kg-1 (-13.5%) and 0.080 mg·kg-1(-26.7%) in the AF treatment as compared to CKCa treatment at the Beishan and Datongqiao sites respectively, while lime was superior to AF on decreasing rice grain Cd content at the nearly neutral site(Meilinqiao). |
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