MOBILIZATION OF ALUMINUM IN SOIL BY ACID DEPOSITION AND ITS UPTAKE BY GRASS CUT FOR HAY - A CHEMICAL TIME BOMB

被引：32

作者：

BLAKE, L

JOHNSTON, AE

GOULDING, KWT

机构：

[1] Soil Science Department, BBSRC Institute of Arable Crops Research, Rothamsted Experimental Station, Harpenden, Hertfordshire

来源：

SOIL USE AND MANAGEMENT | 1994年 / 10卷 / 02期

关键词：

D O I：

10.1111/j.1475-2743.1994.tb00458.x

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Analyses of soil and hay samples collected from the Park Grass Experiment at Rothamsted during the last 137 years indicate slow but significant increases in KCl- and EDTA-extractable aluminium in soil and a sudden and very large recent increase in the concentration of aluminium in the herbage. The latter is associated with a sudden increase in the rate of acidification of the soil over the last 10-15 years and the mobilization of aluminium as the soil enters the aluminium buffer range - a Chemical Time Bomb. Such severe acidification from atmospheric inputs on a well-buffered soil illustrates how quickly an apparently stable situation can change as a result of acid deposition. It highlights the need to protect soils and plants from the effects of acidification by decreasing acid inputs or by liming.

引用

页码：51 / 55

页数：5

共 20 条

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