【摘要】 土地利用方式是影响土壤可持续利用的重要因素。粘土矿物是土壤重要的活泼物质,会受利用方式的影响而发生改变。为了揭示利用方式对土壤粘土矿物的影响,对不同利用方式下的东北黑土进行土壤理化特性及粘粒XRD分析。结果表明:荒地、旱田(大豆)、旱田(玉米)、水田利用的土壤矿物颗粒的风化依次增强,伊利石的含量和结晶度也依次降低。经水田利用后的黑土,粘土矿物的演变过程为:云母→伊利石→蛭石和绿泥石。定量结果表明黑土水田利用会出现蛭石绿泥石化现象。综合说明旱田利用会使土壤结构破坏以及水土流失加剧,而水田利用则能较好的协调土壤理化性质,可较大程度的改良土壤。更多还原

【Abstract】 Land-use pattern is an important affect factor to sustainable use of soil,but soil clay mineral is an important active substances,and is easily affected by land-use patterns.In order to reveal the influence of land use pattern on clay minerals,this paper studied the physical and chemical properties of black soils and XRD data of clay minerals under the different land-use patterns.The results showed that under using of the wasteland,dry-land(soybeans),dry-land(corn) and paddy field,the weathering of soil mineral particles enhanced,but contents and crystallinities of illite decreased.After the paddy field using,the evolution sequence of black soil clay minerals is: mica→ illite → vermiculite → chlorite.Quantitative results show that the paddy field use pattern will induce the chloritization phenomenon of vermiculite.Dry land use pattern could damage soil structure and increase soil erosion,while the use pattern of paddy field can improve physical and chemical properties of the soil.更多还原