吉林省西部羊草草原土壤微域性特征研究

以吉林省西部羊草草原为研究对象,选择9个常见植物群落,并对其小生境范围内土壤理化性质及其变异性进行研究,探明土壤微域性特征。结果表明:土壤盐渍化程度大小顺序为,光板地>角碱蓬群落>星星草群落>寸草苔群落>芦苇群落>羊草群落>扁杆镳草群落>圆叶碱地毛茛群落>鹅绒萎陵菜群落,与群落次生演替方向相一致;土壤含水量表现为中旱生植物群落均比湿生植物群落土壤含水量低,且以光板地最低。土壤养分在寸草苔群落、芦苇群落、羊草群落和圆叶碱地毛茛中的含量较高,其他群落较低,与群落盐渍化演替方向没有明显联系。各土壤理化指标在不同样地间变异性除全磷为弱变异外,其余指标均属于中等变异。星星草和寸草苔群落属于粘土组,壤质地为粉粘土;羊草群落和扁杆镳草群落为砂质壤土;光板地、角碱蓬群落、芦苇群落、圆叶碱地毛茛群落和鹅绒委陵菜群落土壤为砂质粉粘壤。羊草群落土壤结构与其他群落比较相对良好;光板地和角碱蓬群落结构系数较低,分散度很高,土壤结构不良。

STUDY ON THE CHARACTERS OF SOIL IN THE MICRO-MINI-AREA IN THE LEYMUS CHINENSIS GRASSLAND OF JILIN WEST PLACE

Leymus chinensis grassland in the western Jilin Province as the research object,nine common plant association were selected,and within its niche the soil physical and chemical properties were studied in order to coderstand,soil micro-domain characteristics.The results showed: the soil salinity level of the order,Bare land > Suaeda corniculata com.(com.is logogram of community)> Puccinellia tenuiflorcom.> Carex duriuscula com.>Phragmites communiscom.>Leymus chinensiscom.>Bolboschoenus compactuscom.>Ranuculus cymbalariacom.>Potentilla anserinecom.And consistent with the direction of secondary succession communities;The performance of soil moisture in the xeric plant communities than for the wet plant soil water content is low,And to bare land to a minimum.Inch of soil nutrients inC.duriusculacom.,P.communiscom.,L.chinensis and R.cymbalaria com.in higher levels,Other communities lower.The soil physical and chemical indicators in the same manner without addition to the variation between a weak variation of total phosphorus,the moderate variation of the other indicators.Soil of C.duriusculacom.and P.communiscom.are clay,L.chinensisand B.compactuscom.for the sandy loam;Bare land,the S.corniculata com.P.communiscom.,R.cymbalariacom.and P.anserinecom.sticky loam soil is sandy powder.L.chinensis community in the soil structure is relatively good compared with other communities;Bare land and in S.corniculatacom.lower coefficient of community structure,dispersion is high,poor soil structure.