福建省清流县李家乡山地油茶园套种圆叶决明水土保持效果初探

摘要

Three-year dynamic changes study was conducted on physical and chemical properties and erosion vol-ume of soil in the oil tea camellia garden intercropping with the Chamaecrista rotundifolia so that to know the soil con-servation effect.The results showed that:1) soil nutrient increases obviously followed with the time changes;2) soil texture is further improved over time, including the reduction of bulk density, increase of the porosity and moisture ca-pacity;3) sand and gravel content gradually decrease while the silt content gradually increase by years, making the soil mechanical composition more reasonable;and 4 ) soil loss appear the decrease trend by years.All these indicated that Chamaecrista rotundifolia has good effect of soil conservation on the soil environment in the oil tea camellia gar-den.%通过对套种圆叶决明的油茶园土壤作为期3年的理化性质及流失量动态变化研究，初步了解茶园套种圆叶决明的水土保持效果，结果表明：①土壤养分随时间变化增幅明显；②土壤质地随时间变化进一步改善，具体表现在其容重降低、孔隙度和持水量增加；③土壤中砂砾含量逐年降低，粉粒含量逐年上升，土壤机械组成更趋合理；④土壤流失量呈逐年降低趋势。表明油茶园套种圆叶决明具有良好的水土保持效果。