CHALK AND CHALK DEBRIS AS A MEDIUM FOR PLANT-GROWTH, WITH PARTICULAR REFERENCE TO CHANNEL TUNNEL SPOIL

被引：5

作者：

BURNHAM, CP

机构：

[1] Department of Agriculture, Horticulture and the Environment, Wye College, University of London, Ashford, Kent

来源：

SOIL USE AND MANAGEMENT | 1990年 / 6卷 / 03期

关键词：

D O I：

10.1111/j.1475-2743.1990.tb00822.x

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Abstract. Four lithological types of chalk are recognized. Normal white chalk has 34–50% porosity, nearly all of which holds water conventionally‘available’to plants. Hard chalk and grey chalk have less porosity and available water; chalk marl has very little available water. Significant capillary rise from below the root zone can be expected in normal white chalk only, and is not halted by fragmentation. Chalk has little N and usually little P. Only grey chalk and chalk marl have much ettractable K and Mg. These also slake, impeding roots. Thus, fertilized plants tolerant of high pH can grow well on normal white chalk debris, but on raw chalk marl, e.g. Channel Tunnel spoil, they need irrigation. Interesting plants volunteer on chalk debris, even on slaked chalk marl by the sea. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：131 / 136

页数：6

共 49 条

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