Pedosphere 22(5): 650--660, 2012
ISSN 1002-0160/CN 32-1315/P
©2012 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Responses of Agronomic Benefit and Soil Quality to Better Management of Nitrogen Fertilizer Application in Greenhouse Vegetable Land |
| JIANG Hui-Min1, ZHANG Jian-Feng1, SONG Xiao-Zong2, LIU Zhao-Hui2, JIANG Li-Hua2, YANG Jun-Cheng1 |
| 1.Ministry of Agriculture Key Laboratory of Crop Nutrition and Fertilization, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China;2.Institute of Agricultural Resources and Environment, Shandong Academy of Agricultural Sciences, Jinan 250100, China |
| ABSTRACT |
| As a result of intensive greenhouse vegetable production in northern China,the potential risk of nitrogen(N)fertilizer over-applied is increasingly apparent and is threatening ecosystem and the sustainability of food production.An experiment was carried out in Shouguang,Shangdong Province,China to evaluate agronomic benefit and soil quality under different N applications,including the conventional chemical N rate(1000 kg N ha-1 season-1,N1),70%of N1(N2),70%of N1+maize straw(N3),50%of N1+maize straw+drip irrigation(N4),and 0%of N1(N0),during two successive growing seasons of autumn-winter(AW)and winter-spring (WS).The maximum yields for N4 were 1.1 and 1.0 times greater than those for N1 in the AW and WS seasons,respectively.N agronomic effciency(AEN)and apparent N recovery effciency(REN)were greatest with the N4.A significant relationship was found between soil NO3--N content and effectrical conductivity(EC)(R2=0.61 in the AW season and R2=0.29 in the WS season).Reducing N fertilizer decreased soil NO3--N accumulation(20.9%-37.8%reduction in the AW season and 11.7%-20.1%reduction in the WS season)relative to the accumulation observed for N1 within the 0-100 cm soil layer.Soil urease and invertase activities were not significantly different among N treatments.The N4 treatment would be practical for reducing excess N input and maintaining the sustainability of greenhouse-based intensive vegetable systems in Shouguang. |
| Key Words: maize straw,N use effciency,soil enzyme,soil NO3--N accumulation,tomato yields |
| Citation: Jiang, H. M., Zhang, J. F., Song, X. Z., Liu, Z. H., Jiang, L. H. and Yang, J. C. 2012. Responses of Agronomic Benefit and Soil Quality to Better Management of Nitrogen Fertilizer Application in Greenhouse Vegetable Land. Pedosphere. 22(5): 650-660. |
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