In-situ soil solution chemistry in an acid forest soil as influenced by growing roots of Norway spruce (Picea abies [L.] Karst)

被引:36
作者
Dieffenbach, A [1 ]
Gottlein, A [1 ]
Matzner, E [1 ]
机构
[1] UNIV BAYREUTH,DEPT SOIL ECOL,BITOK,D-95440 BAYREUTH,GERMANY
关键词
micro lysimetry; Norway spruce; nutrient uptake; rhizosphere; rhizotron; soil solution chemistry; RHIZOSPHERE;
D O I
10.1023/A:1004283508101
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
A new approach for non-destructive monitoring of soil solution chemistry in high spatial and temporal resolution for rhizosphere studies is presented. In a 5 x 10 mm grid, 30 micro suction cups (01mm) were installed in a rhizotron with Norway spruce (Picea abies [L.] Karst.) growing in low pH B-horizon soil. Roots grew through the grid, closely passing the suction cups. Soil solution composition before, during and after root passage was determined. For K+ and Mg2+ a significant decrease of soil solution concentration near root tips and elongation zones was observed, indicating a marked uptake of these elements. Mg2+ concentration was also significantly lowered when the root system aged, suggesting that this ion might also be taken up in older parts of the root system. No influence of growing roots was found on Na+-concentrations.
引用
收藏
页码:57 / 61
页数:5
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