2 *T0:Unleached soil,T1:Control,T2:treated with urea,T3:treated with fallen tea leaves.表2 淋洗对表层盐基性质的影响(0~20 cm)Table2 Influence of leaching on base properties of topsoil 土壤Soils 处理代号TreatmentNo.交换性钾Exch.K〔cmol(K+)/kg〕交换性钙Exch.Ca 交换性镁Exch.Mg 交换性盐基总量Sum of exch.bases(cmol/kg) 盐基饱和度PBS(%) 赤红壤 T0 0.30 3.04 0.18 3.60 81.8 LRS T1 0.11 2.06 0.11 2.37 70.5 T2 0.09 1.12 0.08 1.37 35.0 T3 0.20 1.89 0.23 2.40 74.1 黄壤 T0 0.61 5.18 1.98 7.85 76.8 YS T1 0.23 3.56 1.45 5.33 75.9 T2 0.19 2.18 0.78 3.25 60.3 T3 0.31 3.66 1.62 5.69 75.3 红壤 T0 0.26 0.98 0.31 1.71 18.5 RS T1 0.12 0.56 0.08 0.84 9.5 T2 0.07 0.48 0.06 0.67 10.9 T3 0.22 0.46 0.13 0.88 9.4 黄棕壤 T0 0.36 5.07 4.03 9.52 82.3 YBS T1 0.21 3.95 3.77 8.03 74.0 T2 0.17 3.27 2.92 6.45 67.8 T3 0.29 3.67 4.97 9.22 70.82.1.1 交换性钾
表层交换性钾含量的