Features of soil chemical property under different land use

• Published in: Xi bei nong lin ke ji da xue xue bao.Zi ran ke xue ban Vol. 33; no. 1
• Main Author: Liu Mengyun，An Shaoshan, Cahng Qingrui
• Format: Journal Article
• Language: Chinese
• Published: 01.01.2005
• Subjects: http://www.fao.org/aos/agrovoc#c_4182; http://www.fao.org/aos/agrovoc#c_7182; LAND USE; PROPIEDADES FISICO - QUIMICAS SUELO; PROPRIETE PHYSICOCHIMIQUE DU SOL; SOIL CHEMICOPHYSICAL PROPERTIES; UTILISATION DES TERRES; UTILIZACION DE LA TIERRA
• ISSN: 1671-9387

在宁夏固原上黄试验区，对灌木林地、农地、天然草地、果园和人工草地上5种土壤的化学性质进行了分析，并探讨了土地利用方式对土壤化学性质的影响。结果表明：①碱解N表为灌木林地农地人工草地天然草地果园；全N表现为天然草地≈灌木林地农地人工草地果园；速效P为果园农地天然草地人工草地灌木林地；速效K为天然草地果园≈农地人工草地灌木林地；有机质表现为天然草地=农地灌木林地人工草地果园；阳离子交换量(CEC)为灌木林地人工草地农地天然草地果园；不同利用方式间pH差异不大。②不同种植年限的灌木林地和天然草地上土样间变异性较大，农地次之，而果园各土样间变异性不大。③在垂直剖面上，灌木林地的碱解N、速效K及有机质含量均为表层高于下层，而速效P、全N及CEC为表层低于下层；天然草地的所有养分含量除速效氮及全氮外，其他均为表层高于下层，但上下变化不剧烈；农地和人工草地主要养分含量及CEC表层高于下层；果园的CEC为表层低于下层，其他指标则为表层高于下层。④天然草地和灌木林地为同类地区最佳利用方式。 In experimental region Shanghuang,Guyuan,Ningxia,the soil chemical properties of bush land,farmland,natural meadow,orchard and artificial meadow had been studied in this paper.The results showed:①Available nitrogen of soil was:bush landFarmlandartificial meadownatural meadoworchard,total nitrogen of soil natural:meadow≈bush landfarmlandartificial meadoworchard,available phosphor of soil:orchardfarmlandnatural meadowartificial meadowbush land,available potassium of soil:natural meadoworchard≈farmlandartificial meadowbush land,organic substance of soil:natural meadow=farmlandb