珠江三角洲海涂土壤

MARINE SOILS OF ZHUJIANG DELTA IN CHINA

珠江三角洲海涂资源丰富,自然肥力较高。其基本特性是:1.质地较粘重,一般物理性粘粒为30—80％;2.盐渍化较明显,全盐量多在0.2—1.8％之间;3.养分较丰富,有机质含量一般为1.6—2.4％;4.呈中性至微碱性反应。主要开发模式是围垦和海水养殖。因热量和淡水资源较丰富,有很大的开发利用价值。

The tidal flat of Zhujiang delta with its rich resource is an important muddy coast in China. The main characteristics of the Marine soils are as follows.1. The soils are comparatively viscous with a content of physical clay ranging from 30% to 80% eycept for the sandy soil (less than 12%).2. Salinization is obvious with salt content ranging from 0.2% to 1.8%.3. The organic matter content in the soil accounts for 1.6% to 2.4% except for the sandy soil (less than 0.4%).4. The silica-sequiozide ratio ranges from 6-19.7 and most of the soils are neutral or alkaline.The beach is flat and the topography offers a natural protection from wave of this area. The productivity of beach soil is high and developmental prospect of the area is very promising.