INFLUENCE OF FERTILIZED SHORT-ROTATION FOREST PLANTATIONS ON NITROGEN CONCENTRATIONS IN GROUNDWATER

被引：13

作者：

BERGSTROM, L

JOHANSSON, R

机构：

[1] Department of Soil Sciences, Swedish University of Agricultural Sciences, Uppsala, S-750 07

[2] Department of Ecology and Environmental Research, Swedish University of Agricultural Sciences, Uppsala, S-750 07

来源：

SOIL USE AND MANAGEMENT | 1992年 / 8卷 / 01期

关键词：

D O I：

10.1111/j.1475-2743.1992.tb00890.x

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

The influence of intensively fertilized short-rotation forest plantations on nitrogen concentrations in groundwater was studied by piezometer readings and water sampling over a two-year period in a sandy field growing willow (Salix spp.) and other species. The mineral-N content of the unsaturated zone was measured in soil samples collected to 0.9 m depth. Although piezometer readings suggested that deep groundwater could be affected, the concentrations of nitrate-N and ammonium-N were usually less than 1 mg per litre. There was also little mineral-N in the unsaturated zone, except for occasional peaks in the topsoil (0-30 cm) after application of fertilizer. We conclude that there is little risk of nitrogen contamination of groundwater in intensively cultured tree stands receiving up to 150 kg N/ha/yr as fertilizer. This is probably because willow can take up water and nitrogen from deep parts of the soil profile.

引用

页码：36 / 40

页数：5

共 17 条

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