福建海涂养分特性的研究

福建海涂养分具有特殊的来源,根据243个海涂剖面分析资料统计,全钾含量平均达2.45±0.31％,速效钾为711±217ppm,钾素丰富;有机质、全氮和全磷量平均值达中等以上水平,微量元素也较丰富,是值得重视的土地资源。我省海涂养分分布具有3个特点;1、养分水平与机械组成、有机质含量呈极显著相关;2、养分含量存在明显的地域性差异,隐蔽港湾型有机质含量较高,闽江口以北海涂的养分较高;3、海涂养分累积特点是红树林生态型>草滩生态型>光滩生态型。

AN APPROACH TO THE NUTRIENT FEATURES OF THE SEABEACH SOIL IN FUJIAN PROVINCE

This paper deals with the nutrient features of seabeach soil in Fujian Province.The nutrients of seabeach soil may originate in special ways,and are rather rich.According to analysis on their 243 profiles,po- tassium status is richest among the nutrient factors in consideration with the mean value of 2.45±0.31％ total content and 711±217ppm available content.Besides,the contents of organic substance,total nitrogen and total phophorus are mostly over the medium level.The microelements found in them are also rather rich.Therefore the soils would be the land resources for many uses.The nutrient distribution for seabeach soils in Fujian Prvionce characterized by three main aspects:(1)the nutrient content shows a highly singnificant positive relationship with the contents of soil physical clay (<0.01mm)and organic substance,(2)the nutrient contents appears to be evident differences between regions,i.e.organic substance contents is high- er in harbourbay concealment than other coastal zone,and the nutrient contents are higher in north coastal zones than in south in Minjiang out lets,and(3)in various seabeach soils,the nutrient accumulation in sequence are mangrove seabeach,grass seabeach,bare seabeach for vegetation.