文昌滨海贝屑沙土养分特征  

Nutrient Characteristics of Coastal Shell-debris Riched Sandy Soils in Wenchang

作　　者：付登强[1,2] 刘小玉 FU Dengqiang;LIU Xiaoyu(Coconut Research Institute,CATAS,Wenchang,Hainan 571339,China;National Key Laboratory of Tropical Crop Breeding,Haikou,Hainan 571101,China)

机构地区：[1]中国热带农业科学院椰子研究所,海南文昌571339 [2]热带作物生物育种全国重点实验室,海南海口571101

出　　处：《热带农业科学》2024年第8期48-51,共4页Chinese Journal of Tropical Agriculture

基　　金：海南省基础与应用基础研究计划高层次人才项目(No.2019RC338)。

摘　　要：为了解不同土地利用方式下文昌滨海贝屑沙土的基本养分特征,对文昌市主要滨海贝屑沙土区6类植被类型的90块样地表层土壤进行采样分析。结果表明:文昌滨海贝屑沙土呈弱碱性,pH为(7.85±0.47);有机质(11.75±4.86)g/kg和碱解氮(70.59±42.64)mg/kg,含量偏低;有效磷[Olsen-P,(44.59±55.46)mg/kg]含量较高,样品间差异较大;速效钾含量为(78.83±72.72)g/kg;林地土壤严重缺磷;耕地土壤,尤其是蔬菜地的磷含量极为丰富。研究结果反映了文昌滨海贝屑沙土的养分现状,可为科学制定区域农作物施肥方案提供参考,同时对土壤磷过量提出预警。To know the fundamental nutrient characteristics of Wenchang coastal shell debris-rich sandy soil under different land use types,90 surface soil samples from six vegetation types in the prime coastal shell debris-rich sandy soil areas of Wenchang City were collected and analyzed.The results revealed that the coastal shell debris riched sandy soil in Wenchang is weakly alkaline,with a pH value of(7.85±0.47);the contents of organic matter(11.75±4.86)g·kg-1 and alkaline nitrogen(70.59±42.64)mg·kg-1 are relatively low;the content of available phosphorus[Olsen-P,(44.59±55.46)]mg·kg-1 is relatively high and significantly different between samples;the content of available potassium is(78.83±72.72)g·kg-1;severe phospho-rus deficiency exists in forest soil;the phosphorus content in arable soil,especially in vegetable fields,is incredibly abundant.The results reflect the nutrient status of the coastal shell-debris sandy soil in Wenchang,providing a reference for the scientific formulation of regional crop fertilization plans and early warning of excessive soil phosphorus.

关 键 词：滨海贝屑沙土 养分状况 土地利用方式 

分 类 号：S151[农业科学—土壤学]