利用方式和土壤类型对土壤肥力质量指标的影响

Effects of land use and soil type on selected soil fertility quality indicators.

比较了三种土壤类型 (黄筋泥、红泥土和红砂土 )、四类利用方式 (林地、果园、茶园和旱地 )及二个土层 (0～ 15 cm和 15～ 30 cm)之间主要肥力质量指标量值的变化。结果表明 ,大部分土壤质量指标的量值与土壤类型、利用方式和土层深度有密切的关系。其中 ,粘粒含量、>0 .2 5 mm和 >5 mm的风干团聚体、>0 .2 5 mm水稳定性团聚体含量及 CEC与土壤类型关系密切 ;全磷、有效磷、有效钾、交换性酸和p H值主要与利用方式有关 ;容重、饱和导水率、有机碳、全氮、有效氮和根系数量与土壤类型和利用方式均存在密切关系。表土层与亚表层之间的粘粒含量、容重、饱和导水率、有机碳、全氮、全磷、有效磷、有效钾、有效氮及 p

The differences of some soil fertility quality indicators between three soil types (quaternary red clay, red loam soil and red sandstone soil), four land use types (Forestry land, Orchard, Tea garden and upland) and two soil horizons (0 15 cm and 15 30 cm) were compared in this paper. The results showed that most of selected soil fertility quality indicators were closely related to soil type, land use type and soil horizon. Among them, contents of clay, >0.25 mm dry aggregates, >5 mm dry aggregates, >0.25 mm water stable aggregates, and CEC were mainly related to soil type, and total P, available P, available K, exchangeable acidity and pH were mainly controlled by land use. Soil bulk density, saturated hydraulic conductivity, organic C, total N, available N and root content were related to both land use and soil type. The difference of clay, bulk density, saturated hydraulic conductivity, organic C, total N, total P, available N, P, and K and pH was significant between surface and subsurface horizons.