Record ID No. |
5268 |
Author(s) |
Zhang S., Wang L., Ma F., Zhang X., Fu D. , 2016 |
Affiliation |
State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China. Email:zhangshujuan525@sina.com |
Title |
Reducing nitrogen runoff from paddy fields with arbuscular mycorrhizal fungi under different fertilizer regimes |
Source. Vol.(no):Page |
Journal of Environmental Sciences. 46: 92-100p. |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Methodology Pollution |
Sub-subjects |
Nitrogen metabolism |
Host |
Paddy |
Organism |
Glomus mosseae |
Country |
China |
Abstracts |
Nitrogen (N) runoff from paddy fields serves as one of the main sources of water pollution. Our aim was to reduce N runoff from paddy fields by fertilizer management and inoculation with arbuscular mycorrhizal fungi (AMF). In northeast China, Shuangcheng city in Heilongjiang province, a field experiment was conducted, using rice provided with 0%, 20%, 40%, 60%, 80%, and 100% of the local norm of fertilization (including N, phosphorus and potassium), with or without inoculation with Glomus mosseae. The volume, concentrations of total N (TN), dissolved N (DN) and particulate N (PN) of runoff water were measured. We found that the local norm of fertilization led to 18.9 kg/ha of N runoff during rice growing season, with DN accounting for 60%–70%. We also found that reduction in fertilization by 20% cut down TN runoff by 8.2% while AMF inoculation decreased N runoff at each fertilizer level and this effect was inhibited by high fertilization. The combination of inoculation with AMF and 80% of the local norm of fertilization was observed to reduce N runoff by 27.2%. Conclusively, we suggested that the contribution of AMF inoculation combined with decreasing fertilization should get more attention to slow down water eutrophication by reducing N runoff from paddy fields. |