不同撂荒年限紫色土区耕地土壤理化性质特征  

Physicochemical Properties of Cultivated Land in Purple Soil Areas with Different Abandoned Years

作　　者：苏岚 陈国建[1] 何双宏 孙成彬 何谦 张春叶 SU Lan;CHEN Guojian;HE Shuanghong;SUN Chengbin;HE Qian;ZHANG Chunye(College of Geography and Tourism,Chongqing Normal University,Chongqing 401331,China)

机构地区：[1]重庆师范大学地理与旅游学院,重庆401331

出　　处：《宜宾学院学报》2022年第12期67-71,共5页Journal of Yibin University

基　　金：重庆市装配式绿色土地整治技术创新创业示范团队项目(CQYC201903221);重庆市土地整治装配式构件研发与应用示范项目(KJ-0180012)。

摘　　要：为了测定紫色土区不同撂荒年限土壤的理化性质,选取重庆市渝北区统景镇撂荒0~15年的耕地,以测定土壤的物理性质(土壤含水量、容重、孔隙度)和化学性质(土壤有机质、全氮、全磷、全钾、碱解氮、速效磷、速效钾).结果表明:不同撂荒年限耕地土壤容重、含水量随年限增加先升后减,土壤孔隙度增减情况与之相反.除全钾外其他肥力指标有表聚现象,土壤化学性质含量呈现先减少后增加的趋势.土壤容重与全氮、碱解氮以及速效磷、速效钾呈显著负相关,土壤含水量与土壤有机质、全氮、碱解氮、速效磷、速效钾呈显著正相关.In order to determine the physical and chemical properties of soils with different abandoned years in purple soil area,the cultivated land abandoned for zero to 15 years in Tongjing town,Yubei district,Chongqing was selected to determine the physical properties(soil water content,bulk density,porosity)and chemical properties(soil organic matter,total nitrogen,total phosphorus,total potassium,alkali-hydrolyzable nitrogen,available phosphorus and available potassium).The results showe that the soil bulk density and water content of cultivated land with different abandoned years increase first and then decrease,and the increase and decrease of soil porosity are opposite.Except total potassium,other fertility indexes have surface aggregation,and the content of soil chemical properties first decreases and then increases.Soil bulk density is negatively correlated with total nitrogen,alkali-hydrolyzable nitrogen,available phosphorus and available potassium,while soil water content is positively correlated with soil organic matter,total nitrogen,alkali-hydrolyzable nitrogen,available phosphorus and available potassium.

关 键 词：撂荒年限 紫色土区 土壤理化性质 统景镇 

分 类 号：S156[农业科学—土壤学] K903[农业科学—农业基础科学]