›› 1987, Vol. 7 ›› Issue (2): 128-136.

• 论文 • 上一篇    下一篇

湛江港和雷州湾海涂土壤特性

张希然, 罗旋   

  1. 广东省土壤研究所
  • 出版日期:1987-04-30 发布日期:1987-04-30

THE CHARACTERISTICS OF TIDAL FLAT SOIL OFZHANJIANG HARBOUR AND LEIZHOU BAY

Zhang Xiran, Luo Xuan   

  1. Institute of Soil Science of Guangdong Province
  • Online:1987-04-30 Published:1987-04-30

摘要: 湛江港和雷州湾是粵西重要港湾。它们水体相连,都是在断裂带基础上发育的溺谷性海湾。呈喇叭状,湾口有一系列岛屿。由于沉积环境良好,在潮间带及其紧邻浅海湾(水深5米以浅)形成了大片海涂。这些海涂地势平坦,土壤质地较合宜,热量资源丰富,避风条件良好,是我省发展水产养殖的重要基地之一。本文根据作者近几年来参加广东省海岸带和海涂资源调查所得的部分资料写成,目的在于阐述该区海涂土壤的基本特性,为合理开发和生产布局提供科学依据。

Abstract: Situated at the west of Guangdong Province,Zhanjiang harbour and Leizhou are both of submerged valley with tidal flat soil resources.The main characteristics of the tidal flat soils are as follows:(1)The soil texture is mainly of sandy to heavy loam with a content of physical clay of 16~59%in the surface;(2)The organic matter is mostly of 1.5~2.5%,while in acid tidal soil,7.9%.The contents of total nitiogen and alkali soluble nitrogen are low,while the total potassium and rapid available potassium are very rich;(3)The degree of salinization is high and the total salt ranges from 0.8 percent to 2.0 percent except that the tidal flat sandy soil is less than 0.6 percent;(4)The nature of swamping action is very obvious and the whole soil body is bluish gray except the surface soil (about 2~3 cm thick);(5)The silica-sesquioxide ratio ranges from 2.1 to 2.5.Most of the soils are neutral or alkaline reaction (except the acid tidal flat soil).