Response of soil nutrients to terracing and environmental factors in the Loess Plateau of China  

作　　者：Die Chen Wei Wei Liding Chen Bojun Ma Hao Li 

机构地区：[1]Department of Soil and Water Conservation,Changjiang River Scientific Research Institute,Wuhan 430010,China [2]State Key Laboratory of Urban and Regional Ecology,Research Center for Eco-environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Research Center on Mountain Torrent&Geologic Disaster Prevention of Ministry of Water Resources,Wuhan 430010,China

出　　处：《Geography and Sustainability》2024年第2期230-240,共11页地理学与可持续性（英文）

基　　金：the National Natural Science Foundation of China(Grants No.42201100,U21A2011,41991233);the Central Public-Interest Scientific Institution Basal Research Fund(Grant No.CKSF2023301);the Knowledge Innovation Program of Wuhan-Basic Research(Grant No.2022020801010236).

摘　　要：Terracing is a widely adopted agricultural practice in mountainous regions around the world that aims to conserve soil and water resources.Soil nutrients play a crucial role in determining soil quality,particularly in landscapes prone to drought.They are influenced by factors such as land-use type,slope aspect,and altitude.In this study,we sought to examine the impact of terracing on soil nutrients(soil organic content(SOC),total nitrogen(TN),nitrate-nitrogen(NO_(3)^(-)-N),ammonium nitrogen(NH_(4)^(+)-N),total phosphorus(TP),available phosphorus(AP),total potassium(TK),and available potassium(AK))and how they vary with environmental factors in the Chinese Loess Plateau.During the growing season,we collected 540 soil samples from the 0 to 100 cm soil layer across five major land-use types,different slope aspects,and varying altitudes.Additionally,a meta-analysis of literature data further corroborated the effective accumulation of soil nutrients through terracing in the Loess Plateau.Our findings are as follows:(1)Terraced fields,regardless of land-use type,showed a significant improvement in SOC and TN content.(2)Soil nutrient contents within terraced fields were predominantly higher on sunny slopes.(3)Terraces at lower altitudes are characterized by elevated SOC concentrations.(4)A meta-analysis of literature data pertaining to terracing and soil nutrients in this region confirmed the effective accumulation of soil nutri-ents through terracing.The elucidated outcomes of this study offer a profound theoretical underpinning for the accurate planning and management of terraces,the scientific utilization of land resources,and the enhancement of land productivity.

关 键 词：TERRACE Soil nutrients Land-use Slope aspect ALTITUDE Loess Plateau 

分 类 号：S157.1[农业科学—土壤学]