Can arbuscular mycorrhiza and fertilizer management reduce phosphorus runoff from paddy fields?  

作　　者：Shujuan Zhang Li Wang Fang Ma Xue Zhang Zhe Li Shiyang Li Xiaofeng Jiang 

机构地区：[1]State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering,Harbin Institute of Technology

出　　处：《Journal of Environmental Sciences》2015年第7期211-218,共8页环境科学学报（英文版）

基　　金：supported by National Natural Science Foundation of China (51179041);Major Science and Technology Program for Water Pollution Control and Treatment (No. 2013ZX07201003);the State Key Lab of Urban Water Resource and Environment (Harbin Institute of Technology) (No. 2014TS05)

摘　　要：Our study sought to assess how much phosphorus（P） runoff from paddy fields could be cut down by fertilizer management and inoculation with arbuscular mycorrhizal fungi. A field experiment was conducted in Lalin River basin, in the northeast China： six nitrogen-phosphorus-potassium fertilizer levels were provided（0, 20%, 40%, 60%, 80%, and 100% of the recommended fertilizer supply）, with or without inoculation with Glomus mosseae. The volume and concentrations of particle P（PP） and dissolved P（DP） were measured for each runoff during the rice growing season. It was found that the seasonal P runoff, including DP and PP, under the local fertilization was 3.7 kg/ha, with PP, rather than DP, being the main form of P in runoff water. Additionally, the seasonal P runoff dropped only by 8.9% when fertilization decreased by 20%; rice yields decreased with declining fertilization. We also found that inoculation increased rice yields and decreased P runoff at each fertilizer level and these effects were lower under higher fertilization. Conclusively, while rice yields were guaranteed arbuscular mycorrhizal inoculation and fertilizer management would play a key role in reducing P runoff from paddy fields.Our study sought to assess how much phosphorus（P） runoff from paddy fields could be cut down by fertilizer management and inoculation with arbuscular mycorrhizal fungi. A field experiment was conducted in Lalin River basin, in the northeast China： six nitrogen-phosphorus-potassium fertilizer levels were provided（0, 20%, 40%, 60%, 80%, and 100% of the recommended fertilizer supply）, with or without inoculation with Glomus mosseae. The volume and concentrations of particle P（PP） and dissolved P（DP） were measured for each runoff during the rice growing season. It was found that the seasonal P runoff, including DP and PP, under the local fertilization was 3.7 kg/ha, with PP, rather than DP, being the main form of P in runoff water. Additionally, the seasonal P runoff dropped only by 8.9% when fertilization decreased by 20%; rice yields decreased with declining fertilization. We also found that inoculation increased rice yields and decreased P runoff at each fertilizer level and these effects were lower under higher fertilization. Conclusively, while rice yields were guaranteed arbuscular mycorrhizal inoculation and fertilizer management would play a key role in reducing P runoff from paddy fields.

关 键 词：Arbuscular mycorrhizal fungi FERTILIZER Paddy fields Phosphorus runoff RICE 

分 类 号：S511[农业科学—作物学] X71[环境科学与工程—环境工程]