Water use by contour-planted belts of trees comprised of four Eucalyptus species

被引:64
作者
White, DA
Dunin, FX
Turner, NC
Ward, BH
Galbraith, JH
机构
[1] CSIRO, Forestry & Forest Prod, Ctr Mediterranean Agr Res, Wembley, WA 6913, Australia
[2] CSIRO, Plant Ind, Ctr Mediterranean Agr Res, Wembley, WA 6913, Australia
[3] Agr Western Australia, Katanning, WA 6317, Australia
关键词
groundwater; salinity; sapflow; soil water; transpiration; water logging;
D O I
10.1016/S0378-3774(01)00161-5
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Over a 12-month period, soil water content and water use were measured concurrently in a contour-planted belt of trees comprised of Eucalyptus saligna (Smith), E. camaldulensis (Dehnh), E. leucoxylon (F. Muell) and E. platypus (Hook). These data were used to calculate water uptake by the trees from current rainfall, and from sources other than current rainfall (U'), to describe the temporal pattern of switching between these water sources, and to calculate the number and spacing of tree-belts necessary to reduce groundwater recharge to 5 turn per year. The data were also used to quantify competition for water between trees and adjacent crops or pastures. The tree-belt used 595 mm on a projected crown area basis over a 12-month period. Of this. 440 rum was transpiration, 100 mm interception and 55 mm soil evaporation. Rainfall was 445 mm and was all captured by the upper 2 m of the soil profile. U' was 150 turn. Both soil water measurements and piezometric data from the same site indicated that most of U' was from groundwater flowing under the trees. This study confirms that where groundwater is accessible, contour-planted belts of trees are an effective means of reducing groundwater recharge with minimal tree-crop competition for water. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:133 / 152
页数:20
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