CAJ | 학술논문

为评价种植枸杞对改良次生盐渍化土壤的效果，实现次生盐渍化土地资源的持续利用，对次生盐渍化土地不同利用方式的弃耕地、不同种植年限枸杞地和小麦地的土壤理化性质进行了调查研究。结果表明，与弃耕地相比，枸杞地土壤有机质、全氮、碱解氮含量显著增加；水溶性盐离子除 HCO3－显著增加、Ca2＋降低不明显外，K＋、Na＋、Mg2＋、Cl－、SO42－、全盐量、电导率均显著降低，离子组成中 Na＋降幅最大，达70．1％～82．9％，全盐量降低70．9％～82．8％；砂砾含量降低、粉粒和粘粒含量升高，CaCO3含量升高，pH 值降低，容重先降低后升高，孔隙度先升高后降低。枸杞地 Na＋和全盐量比小麦地分别高118．1％～282．3％和84．0％～211．5％，其他土壤理化指标和小麦地没有差异。这些说明种植枸杞改善了次生盐渍化土壤质量，除占盐分主导地位的 Na＋含量明显较高外，其他土壤性状恢复至与盐渍化程度低的传统农耕地相当。种植枸杞的前4年间土壤理化性质发生了迅速变化，之后变化速度很缓慢。土地利用方式的变化对次生盐渍化土壤性状具有重要影响。
위평개충식구기대개량차생염지화토양적효과，실현차생염지화토지자원적지속이용，대차생염지화토지불동이용방식적기경지、불동충식년한구기지화소맥지적토양이화성질진행료조사연구。결과표명，여기경지상비，구기지토양유궤질、전담、감해담함량현저증가；수용성염리자제 HCO3－현저증가、Ca2＋강저불명현외，K＋、Na＋、Mg2＋、Cl－、SO42－、전염량、전도솔균현저강저，리자조성중 Na＋강폭최대，체70．1％～82．9％，전염량강저70．9％～82．8％；사력함량강저、분립화점립함량승고，CaCO3함량승고，pH 치강저，용중선강저후승고，공극도선승고후강저。구기지 Na＋화전염량비소맥지분별고118．1％～282．3％화84．0％～211．5％，기타토양이화지표화소맥지몰유차이。저사설명충식구기개선료차생염지화토양질량，제점염분주도지위적 Na＋함량명현교고외，기타토양성상회복지여염지화정도저적전통농경지상당。충식구기적전4년간토양이화성질발생료신속변화，지후변화속도흔완만。토지이용방식적변화대차생염지화토양성상구유중요영향。
This study evaluates the effect of planting medlar on the sustainable use of secondary salinized land. The physical and chemical properties of secondary salinized soil were investigated under different land use pat-terns,including an abandoned field (AF),medlar fields with different planting years (MF)and a wheat field (WF).Compared to AF,the MF soils showed significant increases in organic matter,total nitrogen,available nitrogen,and HCO3 - ,while total salt content and electrical conductivity significantly decreased.The most significant decrease was in Na+ (70.1%-82.9%).Results also showed that in MF soils the sand content de-creased and silt and clay content increased.CaCO3 content increased and pH value decreased.However,bulk density firstly decreased and then increased over time,while porosity showed an opposite trend when compared with AF.K+ and total salt content were higher in MF than in WF by 118.1%-282.3% and 84.0%-211.5%respectively.Other soil physical and chemical properties showed no significant differences between MF and WF.The results show that secondary salinized soil quality is improved by planting medlar.Although Na+ con-tent was significantly higher,other soil characteristics were relatively low compared to salinization of tradition-al cropland.The improvement of soil characteristics was rapid during the first 4 years of medlar planting and then slowed considerably.The study thus shows that changes in land use patterns greatly influence the soil characteristics of secondary salinized land.