淤泥质海岸防护林的降盐改土功能

研究了淤泥质海岸防护林降盐改土的功能,结果表明,淤泥质海岸防护林表土已脱盐,土壤中可溶性离子成份发生了很大变化,不具有典型盐渍土的特性,土壤含盐量与潜水矿化度密切相关（r=0.9940),并随季节变化表现出不同的变化规律,林木根系对降盐改土有很大影响。

Reducing Soil Salinity of Shelter - forest in Silting Coastal Area

The paper is aimed to expound the function of reducing soil salinity of shelter-forest in silting coastal area. The results are as follows: the salinity of top soil under the shelter-forest reduced greatly, and the composition of dissoluble ions also changed. Therefore the soil had no typical salt-affected characteristics. There was a close relationship between soil salinity and mineralization degree of ground water ( r =0.994 0).In addition, there existed different rules during various seasons. Tree roots of the shelter-forest paid an important role on reducing salinity and improving soil.