Mitigating effects of various phosphorus sources on arsenic toxicity under anaerobic conditions for rice and aerobic conditions for sunflower and maize plants  

作　　者：Mehmet BTASKIN Hanife AKCA Selver KAN Havva TASKIN Saima KBABAR Yusuf KKADIOGLU Kiymet DENIZ Aydin GUNES 

机构地区：[1]Department of Soil Science and Plant Nutrition,Faculty of Agriculture,Ankara University,Ankara 06110,Turkey [2]Graduate Institute of International Development,Agriculture and Policy,University of Reading,Whiteknights,Reading RG66AR,UK [3]Ministry of Agriculture and Forestry,General Directorate of Agricultural Research and Policies,Ankara 06800,Turkey [4]Department of Soil Science,Faculty of Crop Production,Sindh Agriculture University,Tandojam 70060,Pakistan [5]Department of Geological Engineering,Faculty of Engineering,Ankara University,Ankara 06110,Turkey

出　　处：《Pedosphere》2024年第6期1146-1157,共12页土壤圈(英文版)

摘　　要：Arsenic(As)contamination is one of the major factors that contribute to environmental pollution,and it plays havoc with sustainability of crop production.Nano-hydroxyapatite(nHAP)can be an effective phosphorus(P)source to cope with As toxicity.The mitigating effects of variable P sources on As toxicity in rice,sunflower,and maize grown in an alkaline soil were evaluated.Arsenic was applied at 0 and 20 mg kg^(-1),and P was applied at 0,50,and 500 mg kg^(-1)in the forms of triple superphosphate(TSP)and nHAP.In addition,the same amount of phosphoric acid was also used in the sunflower and maize experiments with the other P sources.The structural and functional properties of nHAP were determined by Fourier transform infrared spectroscopy,X-ray diffraction,scanning electron microscopy,and energy-dispersive X-ray spectroscopy.Stunted growth was observed in rice,and less in sunflower;maize remained unaffected by As toxicity.In the presence of As,TSP and nHAP at their high doses(500 mg kg^(-1))significantly increased the rice dry weight compared with the control(0 mg kg^(-1)).The As concentration in rice was decreased by approximately 25%in the presence of 50 mg kg^(-1)TSP and 500 mg kg^(-1)nHAP.The P treatments had no significant effect on the As concentration in sunflower,whereas the As concentration in maize was increased by 500 mg kg^(-1)TSP.In the absence and presence of As,nHAP at 50 mg kg^(-1)significantly increased rice P concentration,whereas in the presence of As,500 mg kg^(-1)TSP significantly increased P concentration in rice compared with the control.Arsenic had no significant effect on sunflower P concentration,while the maize P concentration was decreased in the 0 mg kg^(-1)P treatment.It can be concluded that TSP and nHAP were effective in alleviating As toxicity in rice and sunflower.Comparative studies are further needed to determine the long-term effects of TSP and nHAP on prevention of As toxicity in field conditions.

关 键 词：ARSENATE ARSENITE NANO-HYDROXYAPATITE phosphoric acid redox condition triple superphosphate 

分 类 号：S51[农业科学—作物学]