CAJ | 학술논문

为了解不同土地利用方式下重庆地区典型紫色土壤的肥力特征，采集重庆地区旱作地、水旱轮作和水田3种土地利用方式侏罗系时期形成的典型紫色土共354个，进行养分分析。结果表明：不同土地利用方式下，土壤中有机质、氮素和微量元素（硼除外）含量在水田中最高，旱作地中最低；旱作地的有效磷含量最高，是水田的1．8倍；全钾和速效钾含量在各土地利用方式下含量无明显差异。不同土壤类型微量元素含量各不相同，以自流井组暗紫泥中含量最高。不同土地利用方式土壤有机碳、氮库含量及碳氮比大小关系表明，水田利用方式最有利于土壤有机碳氮的积累，但积累速率并非同步。由此可见，水田是重庆紫色土保持土壤肥力质量的最佳土地利用方式。
위료해불동토지이용방식하중경지구전형자색토양적비력특정，채집중경지구한작지、수한륜작화수전3충토지이용방식주라계시기형성적전형자색토공354개，진행양분분석。결과표명：불동토지이용방식하，토양중유궤질、담소화미량원소（붕제외）함량재수전중최고，한작지중최저；한작지적유효린함량최고，시수전적1．8배；전갑화속효갑함량재각토지이용방식하함량무명현차이。불동토양류형미량원소함량각불상동，이자류정조암자니중함량최고。불동토지이용방식토양유궤탄、담고함량급탄담비대소관계표명，수전이용방식최유리우토양유궤탄담적적루，단적루속솔병비동보。유차가견，수전시중경자색토보지토양비력질량적최가토지이용방식。
To explore the fertility characteristics of typical purple soil under different land use types in Chongqing,354 soil samples formed in Jurassic period and selected from paddy field,dry land and paddy-upland rotation land were analyzed.The results showed that:Under different land use types,paddy field had the highest content of soil organic matter,total nitrogen,available nitrogen and microelement(except B),while the dry land had the lowest content;The dry land had the highest available phosphorus concentration,which was 1.8 times higher than that in paddy field;total and available potassium for different land-use types had no significant difference.Different kinds of soil content of each were not identical,but dark purple clay artesian well group got the highest of trace element.The relationship of size among soil organic carbon pool,organic nitrogen pool and C/N under different land use showed that paddy field was the most beneficial to the accumulation of soil organic carbon and nitrogen,but the accumulation rate was not synchronous.The previous results proved that to maintain the best purple soil fertility quality of Chongqing,paddy field was the optimal land use choice.