摘要
南沙人工海岛(以下简称南沙海岛)在我国“经海战略”和“一带一路”倡议中具有重要地位。目前珊瑚砂质土壤培育经验仅限于西沙海岛,南沙经验尚处空白。鉴于此,以西沙和南沙海岛不同植被条件和深度的土壤为研究对象,采用野外采样调查、实验分析与统计检验相结合的方法,系统分析了西沙和南沙土壤理化性质差异,旨在为南沙土壤培育策略提供依据。结果显示:西沙和南沙土壤均以文石、方解石和镁方解石为主,但是西沙存在青磷镁石等含磷次生矿物,南沙则不具备;西沙和南沙土壤发育程度与植被、客土和浇水高度相关;西沙和南沙土壤有机质含量在垂直方向锐减,高温高湿条件不利于土壤腐殖质形成;西沙和南沙土壤对于可溶性营养盐的截留能力均较低;西沙土壤pH与氮、磷、有机质等指标高度负相关,而南沙则不明显;南沙氮、磷与有机质高度相关,而西沙则只有氮与有机质高度相关;总体而言,南沙土壤发育程度更低,呈现显著的贫氮磷特征。在西沙土壤培育经验的基础上,南沙土壤培育须进一步关注有机质、氮、磷的来源及其在珊瑚砂中的有效截留问题。
Nansha artificial islands(hereinafter referred to as Nansha islands)play an important role in my country’s"Economic and Maritime Strategy"and"One Belt,One Road"strategy.At present,the experience of coral sandy soil cultivation is limited to Xisha Islands,and the experience of Nansha is still blank.In view of this,taking the soil of Xisha and Nansha islands with different vegetation conditions and depths as the research objects,using the method of field sampling survey,experimental analysis and statistical test,the differences in physical and chemical properties of Xisha and Nansha soils were systematically analyzed.Cultivation strategies provide the basis.The results show that:the soils of Xisha and Nansha are mainly composed of aragonite,calcite and magnesium calcite,but there are secondary minerals containing phosphite such as magnesite in Xisha,but not in Nansha.Watering is highly correlated;Xisha and Nansha soil organic matter content decreases sharply in the vertical direction,and high temperature and high humidity conditions are not conducive to the formation of soil humus;Xisha and Nansha soils have low retention capacity for soluble nutrients;Xisha soil pH is closely related to nitrogen,phosphorus,Organic matter and other indicators are highly negatively correlated,but not in Nansha.Nitrogen and phosphorus are highly correlated with organic matter in Nansha,while only nitrogen and organic matter are highly correlated in Xisha.In general,Nansha soil has a lower degree of development,showing significant characteristics of poor nitrogen and phosphorus.On the basis of Xisha soil cultivation experience,further attention should be paid to the sources of organic matter,nitrogen and phosphorus and their effective retention in coral sand in Nansha.
作者
赵志伟
沈彤
陈林豪
李芸邑
李莉
梁志杰
梁嘉良
Zhao Zhiwei;Shen Tong;Chen Linhao;Li Yunyi;Li Li;Liang Zhijie;Liang Jialiang(College of Environment and Ecology,Chongqing University,Chongqing 400044,China;Special Engineering Construction Office of Naval Logistics Department,Beijing 100841,China)
出处
《环境工程》
CAS
CSCD
北大核心
2023年第S02期669-676,229,共9页
Environmental Engineering
基金
国家重点研发计划项目(2021YFC3100103)
关键词
南沙
西沙
土壤理化性质
相关性分析
主成分分析
nansha island
xisha island
soil physico-chemical properties
correlation analysis
principal component analysis
