期刊
AGRICULTURAL WATER MANAGEMENT
卷 149, 期 -, 页码 74-80出版社
ELSEVIER
DOI: 10.1016/j.agwat.2014.10.031
关键词
Water contamination; Nutrients; No-till systems; Temperate climate zones; Nitrogen; Phosphorus
资金
- CNPq-National Council of Technological and Scientific Development-Brazil
Riparian buffer zones have the potential to capture chemical contaminants and to mitigate detrimental side-effects in aquatic ecosystems derived from excess fertilizers used in agro-food production. No-till farming systems are well known agricultural practices and are widely used in temperate areas. In that regard, different settings and widths of riparian buffer zones (12, 24, 36,48 and 60 m) with woody vegetation, shrubs or grasses were assessed. The methodology was comprised of the evaluation of a large number of experimental sites and the sampling was conducted after the first rain period and respective fertilizer applications. The results point to the fact that effectiveness is largely controlled by buffer zone width and vegetation type. Indeed, buffer zones with 60 m width composed of woody soils were more effective in phosphorus (99.9%) and nitrogen (99.9%) removal when compared to shrub (66.4% and 83.9%, respectively) or grass vegetation (52.9% and 61.6%, respectively) areas. Woody vegetation has deep rooting systems and woody soils have a higher content of organic matter when compared to grass and shrubs areas. (C) 2014 Elsevier B.V. All rights reserved.
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