CAJ | 학술논문

对我国西南地区代表性水耕人为土诊断层土壤特性进行研究,并采用扫描电镜(SEM)进行土壤微形态研究,结果表明:不同母质和发育程度的水耕人为土,在土壤特性及在剖面上的变化特征都有明显差别.通过SEM观察研究表明:粗、细颗粒物质形态与矿物组成密切相关,如以薄片状、针条状等细粒物质为主的土壤,在水耕条件和外力作用下,易于定向、粘结聚合而引起土壤压实和板结.水耕人为土的微团聚体含量少而分散,对肥力的贡献有限.长期培肥的水耕人为土能够形成丰富的各类微孔隙和微结构类型,是调节土壤水、热、气和养分状况的主要机制.
대아국서남지구대표성수경인위토진단층토양특성진행연구,병채용소묘전경(SEM)진행토양미형태연구,결과표명:불동모질화발육정도적수경인위토,재토양특성급재부면상적변화특정도유명현차별.통과SEM관찰연구표명:조、세과립물질형태여광물조성밀절상관,여이박편상、침조상등세립물질위주적토양,재수경조건화외력작용하,역우정향、점결취합이인기토양압실화판결.수경인위토적미단취체함량소이분산,대비력적공헌유한.장기배비적수경인위토능구형성봉부적각류미공극화미결구류형,시조절토양수、열、기화양분상황적주요궤제.
The soil properties and ultra microstructures of diagnostic horizon of typical Stagnic Anthrosols in southwestern China were studied by scanning electron microscopy(SEM)method.The results indicated that soil properties and variability of profiles showed obvious differences among Stagnic Anthrosols that developed from different parent materials and developed degrees.The SEM observation revealed that the morphologies of coarBe and fine material were correlated to mineral composing closely,e.g.soils which were predominated by fine material of lameHiform and needle strip form were prone to compaction and hardened owing to the effect of orientation and polymerization under anthrostagnic condition and external forces.As the:micro-aggregation of Stagnic Anthmsols was few and diffused,its contribution to fertility was limited.While,a mass of various micro-pores and micmstructures were formed in long-term fertility betterment soils,and this Was the main mechanism to adjust water,heat,air and nutrient harmoniously in Stagnie Anthrosols.