基于1︰5万数据库的福建省土壤全氮密度及储量估算研究  

Estimation of Soil Total Nitrogen Density and Storage in Fujian Province by Using 1:50000 Soil Database

作　　者：陈中星 张楠 黄凯 邱龙霞[1,2] 陈瀚阅 邢世和[1,2] 沈金泉 张黎明[1,2] CHEN Zhongxing;ZHANG Nan;HUANG Kai;QIU Longxia;CHEN Hanyue;XING Shihe;SHEN Jinquan;ZHANG Liming(College of Resource and Environment,Fujian Agriculture and Forestry University,Fuzhou 350002,China;University Key Lab of Soil Ecosystem Health and Regulation in Fujian,Fuzhou 350002,China;Pingdingshan Seed Management Station,Pingdingshan,Fujian 467000,China;Fujian Crop Land Construction and Soil and Fertilizer Station,Fuzhou 350002,China)

机构地区：[1]福建农林大学资源与环境学院,福州350002 [2]土壤生态系统健康与调控福建省高校重点实验室,福州350002 [3]平顶山市种子管理站,福建平顶山467000 [4]福建省农田建设与土壤肥料技术总站,福州350002

出　　处：《土壤学报》2022年第3期688-698,共11页Acta Pedologica Sinica

基　　金：国家自然科学基金项目(41971050);福建省自然科学基金项目(2019J01660);福建农林大学国际科技合作与交流项目(KXGH17017)共同资助。

摘　　要：土壤全氮对于全球温室效应和水体富营养化具有重要的调控作用。基于福建省第二次土壤普查3082个剖面数据和最新建立的1︰5万大比例尺矢量土壤图,对全省土壤全氮储量进行了估算。结果表明:福建省土壤总面积为12.08×10^(6) hm^(2),表层(0~20 cm)和剖面(0~100 cm)土壤的全氮密度分别为0.35 kg·m^(-2)和0.97 kg·m^(-2),储量为42.06 Tg和116.83 Tg。全省土壤全氮密度整体呈自北向南逐渐递减的趋势,且沿海低而内陆高。从不同土壤类型来看,山地草甸土的表层和剖面全氮密度最高,分别为0.85 kg·m^(-2)和2.09 kg·m^(-2);而风沙土的表层和剖面全氮密度最低,分别为0.11 kg·m^(-2)和0.27 kg·m^(-2)。从不同行政区来看,南平市和龙岩市的表层土壤全氮密度最高,分别为0.40 kg·m^(-2)和0.39 kg·m^(-2),而南平市和三明市的剖面土壤全氮密度最高,分别为1.19 kg·m^(-2)和1.11 kg·m^(-2)。总体而言,福建省土壤全氮密度和储量空间分布差异很大,今后可依据不同行政区和土壤类型的全氮分布制定合理的施肥管理措施。【Objective】Soil total nitrogen(STN)plays an important role in terrestrial ecosystems,and hence is of great significance to mitigating the greenhouse effect and water eutrophication.Any slight changes in the STN pool will pose an important impact on global climate.It is,therefore,essential to make a precise estimation of STN density and storage in the effort to optimize nitrogen fertilizer management.However,so far most of the studies on estimation of STN have been done based on medium or small scale soil maps,and few have been reported to be based on provincial level detail soil databases.Consequently this study on STN estimation based on a provincial level soil database may help implement agricultural sustainable development with data support,and design agricultural management strategies.【Method】In this study,based on the most detailed soil database of Fujian Province,consisting of 3082 sampling profiles and a 1:50000 soil map,analyses were carried out of spatial distributions of STN storage and density in the surface soil layer(0-20 cm)and soil profile(0-100 cm),in the bulk soil of the main types of soils of the Province as well as in the soils of different administrative divisions of the Province.The pedological knowledge based method,i.e,PKB,was used to correlate soil attributes with soil spatial data.So the 1:50000 scale soil map consisted of 247969 soil patches and 3082 soil profiles.【Result】Results show that Fujian province has a total of 12.08×10^(6) hm^(2) of soils.The STN density in the surface soil layer and soil profile of the province was averaged to be 0.35 kg·m^(-2) and 0.97 kg·m^(-2),respectively,while the STN storage was 42.06 Tg and 116.83 Tg,respectively.Analysis of the soils by prefecture shows that Nanping City was the highest,being 0.40 kg·m^(-2) and Longyan followed,being 0.39 kg·m^(-2) in STN density in surface soil,whereas Nanping City was the highest,being 1.19 kg·m^(-2) in and Sanming City followed,being 1.11 kg·m^(-2) in STN density in profile soil.Zhangzhou City was

关 键 词：福建省 全氮密度 全氮储量 1︰5万土壤数据库 

分 类 号：S15[农业科学—土壤学]