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| Nitrate Leaching from Maize Intercropping Systems with N Fertilizer Over-Dose |
| NIE Sheng-wei, A Egrinya Eneji, CHEN Yuan-quan, SUI Peng, HUANG Jian-xiong, HUANG Shao-min |
1.Research Center of Circular Agriculture, China Agricultural University, Beijing 100193, P.R.China
2.Key Field Scientific Observation Station of Zhengzhou Fluvo-Aquic Soils Ecology Environment, Ministry of Agriculture/Institute of Plant Nutrition, Resources and Environment, Henan Academy of Agricultural Science, Zhengzhou 450002, P.R.China
3.Soil Science Research Center, University of Calabar, PMB 1115, Nigeria |
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摘要 A 2-yr field experiment was conducted on a calcareous alluvial soil with four summer maize intercropping systems at Shangzhuang Experiment Station (116.3°E, 39.9°N) in the North China Plain. The objective was to determine nitrate leaching from intercropping systems involving maize (Zea mays L.): sole maize (CK), maize + soybean (CST), maize + groundnut (CGT), maize+ ryegrass (CHM), and maize + alfalfa (CMX). Intercropping greatly reduced nitrate accumulation in the 100-200 cm soil layers compared with maize monoculture. Nitrate accumulation under intercropping systems decreased significantly at the 140-200 cm soil depth; the accumulation varied in the order CK>CST>CMX>CHM>CGT. However, compared to the CK treatment, nitrate leaching losses during the maize growing period were reduced by 20.9- 174.8 (CGT), 35.2-130.8 (CHM), 60.4-122.0 (CMX), and 30.6-82.4 kg ha-1 (CST). The results also suggested that intercropping is an effective way to reduce nitrogen leaching in fields with N fertilizer over-dose.
Abstract A 2-yr field experiment was conducted on a calcareous alluvial soil with four summer maize intercropping systems at Shangzhuang Experiment Station (116.3°E, 39.9°N) in the North China Plain. The objective was to determine nitrate leaching from intercropping systems involving maize (Zea mays L.): sole maize (CK), maize + soybean (CST), maize + groundnut (CGT), maize+ ryegrass (CHM), and maize + alfalfa (CMX). Intercropping greatly reduced nitrate accumulation in the 100-200 cm soil layers compared with maize monoculture. Nitrate accumulation under intercropping systems decreased significantly at the 140-200 cm soil depth; the accumulation varied in the order CK>CST>CMX>CHM>CGT. However, compared to the CK treatment, nitrate leaching losses during the maize growing period were reduced by 20.9- 174.8 (CGT), 35.2-130.8 (CHM), 60.4-122.0 (CMX), and 30.6-82.4 kg ha-1 (CST). The results also suggested that intercropping is an effective way to reduce nitrogen leaching in fields with N fertilizer over-dose.
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Received: 11 August 2011
Accepted:
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| Fund: This study was funded by the Key Technologies R&D Program of China during the 11th Five-Year Plan period (2007BAD89B01), the Key Technologies R&D Program of China during the 12th Five-Year Plan period (2011BAD16B15) and the Project of Collaboration between Henan Province and Chinese Academy of Agricultural Sciences Program (102106000034). |
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Corresponding Authors:
Correspondence SUI Peng, Tel/Fax: +86-10-62731163, E-mail: suipengye@cau.edu.cn
E-mail: suipengye@cau.edu.cn
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| About author: NIE Sheng-wei, E-mail: nsw2007@cau.edu.cn; A Egrinya Eneji, E-mail: aeeneji@yahoo.co.uk; CHEN Yuan-quan, E-mail: rardc@163.com |
Cite this article:
NIE Sheng-wei, A Egrinya Eneji, CHEN Yuan-quan, SUI Peng, HUANG Jian-xiong, HUANG Shao-min.
2012.
Nitrate Leaching from Maize Intercropping Systems with N Fertilizer Over-Dose. Journal of Integrative Agriculture, 12(9): 1555-1565.
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