Impacts of maize intercropping with ryegrass and alfalfa on environment in fields with nitrogen fertilizer over-dose

文献类型: 外文期刊

第一作者: Nie, Sheng-wei

作者: Nie, Sheng-wei;Chen, Yuan-quan;Sui, Peng;Huang, Jian-xiong;Nie, Sheng-wei;Egrinya, Enejin A.

作者机构:

关键词: Life cycle assessment;intercropping;environment impact;nitrogen fertilizer

期刊名称:JOURNAL OF FOOD AGRICULTURE & ENVIRONMENT ( 影响因子:0.435; 五年影响因子:0.484 )

ISSN: 1459-0255

年卷期: 2012 年 10 卷 2 期

页码:

收录情况: SCI

摘要: Accumulation of nitrate in soil increases the risk of nitrate leaching and hence ground water nitrate pollution. The impact of maize intercropping with ryegrass and alfalfa on environment in farming systems has been little studied in China. Using the life cycle assessment (LCA) method, we analyzed the effects of different cropping systems (sole maize (CK), maize + ryegrass (CRT), and maize + alfalfa (CAT)) on the environment. The comprehensive index of environmental impacts varied in the order, sole maiz>maize + ryegrass>maize + alfalfa, with corresponding values of 0.1421, 0.1353 and 0.1299, respectively. The results showed that intercropping maize with alfalfa and ryegrass could reduce the adverse effects of over-application of nitrogen fertilizer on the environment. The study further demonstrated that the LCA method may be a convenient and effective approach for analyzing the environmental impact of fertilizer management in agricultural fields.

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