几种典型酸性旱地土壤磷吸附的关键影响因素
作者:
作者单位:

(江西农业大学国土资源与环境学院/江西省鄱阳湖流域农业资源与生态重点实验室,江西 南昌 330045)

作者简介:

颜晓(1984-),女,山东济南人,博士,讲师,主要从事土壤养分循环方面研究。E-mail:yx198499@126.com。

通讯作者:

基金项目:

基金项目:江西省自然科学基金项目(20161BAB213080);国家重点研发计划(2017YFD0200808);江西省教育厅科技计划项目(GJJ150398)。


Key factors influencing phosphorus sorption for several acid upland soils
Author:
Affiliation:

(School of Environmental and Land Resource Management/Key Laboratory of Poyang Lake Watershed Agricultural Resource and Ecology in Jiangxi Province,Jiangxi Agricultural University,Nanchang Jiangxi 330045)

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    以几种典型的酸性旱地土壤为研究对象,测定了土壤磷的等温吸附曲线,描述土壤磷的吸附特征,分析土壤最大吸磷量与土壤理化性质之间的关系,通过通径分析等方法明确了影响磷吸附的关键土壤因素。结果表明:土壤粘粒、游离态氧化铝(Ald)、非晶质氧化铝(Alo)及有机络合态铝(Alp)的含量均与最大吸磷量(Xm)呈极显著正相关(P<0.01),土壤pH值与Xm呈极显著负相关(P<0.01);非晶质铁铝氧化物含量(Feo+Alo)与Xm有显著的正相关关系(r=0.62,P=0.01);而土壤有机质、游离态氧化铁(Fed)、非晶质氧化铁(Feo)及有机络合态铁(Fep)的含量对Xm均无显著影响(P>0.05)。即在本研究区域内,pH值越低,粘粒含量越高的土壤,其铝氧化物、非晶质铁铝氧化物(Feo+Alo)含量越高,土壤的固磷能力越强。粘粒含量可能是影响土壤吸磷能力的一个最关键因素,其次为游离态氧化铝Ald、非晶质氧化铝Alo、有机络合态铝Alp及土壤pH值等,其中各形态氧化铝对Xm的影响效应主要是通过与粘粒的间接作用来实现。

    Abstract:

    Phosphorus(P)sorption characteristics were investigated for fifteen representative samples of acid upland soils using P sorption isotherm experiment.The correlation between Langmuir P sorption maximum(Xm)and basic soil properties and the key soil factors affecting P sorption were also studied by path analysis.The content of soil clay,all kinds of forms of Al oxides(Ald,Alo,Alp)were significantly positively correlated with Xm(P<0.01),and soil pH was significantly negatively correlated with Xm(P<0.01).The content of amorphous Fe and Al oxides(Feo+Alo)was positively correlated with Xm(r=0.62,P=0.01).However,the content of soil organic matter(OM)and all kinds of Fe oxides had insignificant influence on Xm(P>0.05).In other words,the soil with lower pH and higher clay content would had higher contents of Al oxides and amorphous Fe and Al oxides(Feo+Alo),thus having stronger ability on P fixation or retention.Path analysis showed that the content of soil clay was the most important soil property associated with Xm in the acid upland soils of southern China,followed by dithionite-citrate-bicarbonate solution(DCB) extractable Al,oxalate extractable Al,sodium pyrophosphate extractable Al and soil pH,and the soil clay content could also exert influence on Xm via its indirect effect through all kinds of Al oxides.

    参考文献
    相似文献
    引证文献
引用本文

颜晓,卢志红,魏宗强,周春火.几种典型酸性旱地土壤磷吸附的关键影响因素[J].中国土壤与肥料,2019,(3):1-7.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
历史
  • 收稿日期:2018-08-03
  • 最后修改日期:
  • 录用日期:2018-10-04
  • 在线发布日期: 2019-06-26
《中国土壤与肥料》招聘启事
关闭