摘要
为了探究华北平原不同土地利用方式下土壤结构及养分与土壤饱和导水率的关系,研究了6种类型样地(乔木混交林地、乔木纯林地、灌木林地、草地、果园、耕地)的土壤物理结构特征及其与饱和导水率之间的关系。结果表明:不同土地利用方式样地的土壤容重整体表现为耕地>草地>果园>灌木林地>纯林地>混交林地,土壤含水率整体表现为混交林地>纯林地>灌木林地>耕地≈草地>果园,土壤全氮、速效钾及速效磷均整体表现为混交林地>纯林地>灌木林地>草地>果园>耕地,土壤总孔隙度整体表现为混交林地>灌木林地>纯林地>果园>草地>耕地,土壤石砾含量未表现出整体的差异规律,但果园及耕地的土壤石砾含量随着土壤深度的增加而增加。土壤饱和导水率整体表现为混交林地>纯林地>草地>果园≈耕地,不同土地管理下的土壤容重、土壤总孔隙度、土壤含水率、土壤全氮、速效钾、速效磷变化均是影响土壤饱和导水率特征的主要因子,其中土壤容重越小,土壤总孔隙度、土壤含水率、土壤全氮、速效钾、速效磷越大,则土壤饱和导水率越大。混交林及灌木林有利于土壤导水及提水性能的提升;在今后对区域土壤性质及饱和导水率的研究中不能忽略土地利用管理方式及人为干扰的重要影响。
In order to explore the relationship between soil structure,nutrients and soil saturated water conductivity under different land use modes in the North China Plain,the soil physical structure characteristics of six types of plots(tree mixed forest,tree pure woodland,shrub woodland,grassland,orchard,cultivated land)and their relationships with saturated water conductivity were studied.The results show that:the overall soil bulk density of the plots with different land use modes was cultivated land>grassland>orchard>shrub land>pure forest land>mixed forest land.The overall soil moisture content was mixed forest land>pure forest land>shrub land>cultivated land≈grassland>orchard.The overall soil total nitrogen,available potassium and available phosphorus were mixed forest land>pure forest land>shrub land>grassland>orchard>cultivated land.The overall pattern of total soil porosity was mixed forest>shrub forest>pure forest>orchard>grassland>cultivated land.The soil gravel content did not show the overall difference rule,but the soil gravel content of orchard and cultivated land increased with the increase of soil depth.The overall soil saturated water conductivity was mixed forest land>pure forest land>grassland>orchard≈cultivated land.Changes in soil bulk density,total soil porosity,soil water content,soil total nitrogen,available potassium and available phosphorus under different land management were the main factors affecting the characteristics of soil saturated water conductivity.The smaller the soil bulk density,the higher the soil total porosity,soil water content,soil total nitrogen,available potassium and available phosphorus,the higher the soil saturated water conductivity.The important influence of land use management and human disturbance on soil properties and saturated water conductivity should not be ignored in the future research.
作者
常香玲
CHANG Xiang-ling(Puyang Vocational and Technical College,Puyang 457000,Henan Province,China;Puyang College of Technology,Henan University,Puyang 457000,Henan Province,China)
出处
《节水灌溉》
北大核心
2023年第7期28-33,共6页
Water Saving Irrigation
基金
河南省科技攻关重点项目(122102310330)。
关键词
华北平原
土地利用方式
土壤结构
土壤养分
土壤含水率
饱和导水率
North China plain
land use mode
soil structure
soil nutrients
soil moisture content
saturated water conductivity
