福建几种母质不同水育的红壤性水稻土表面电荷特性

The Surface Charge Characteristic of Paddy Soils Derived from Red Earth in Fujian Province

测定了福建省典型的4种母质发育、3种不同水育型的红壤性水稻土及起源土壤剖面的表面电荷特性参数 ZPNC,δ_P 及有关物质组成,探讨了它们之间的关系.表明:(1)ZPNC 均偏于水合氧化物 ZPC 的酸侧,剖面分布呈自上而下递增.(2)除玄武岩母质系列外,其它水稻土耕作层 ZPNC 均小于起源土壤.(3)渗育型水稻土 W_1层和潴育型水稻土 W_2层 ZPNC 较其它土层高.(4)δ_P 变化与 ZPNC 呈反相关趋势.不同水型水稻土剖面 ZPNC 变化主要受水分运动影响下的腐殖质积累和氧化铁淋淀的制约,其中活性铁 Fe(?)的影响最大.(5)不同母质的影响主要表现为高铁和低铁母质水稻土剖面 ZPNC 变异较小。中铁母质者则变异较大,同时亦受到粘粒 SiO_2和 SiO_2/(Al_2O_3+Fe_2O_3)摩尔比的影响.

It was determined that parameters of the surface charge characteristic(ZPNC and δ_p)and other relevant matter of three watter type of paddy soils derived from red earth of four typical parent materials in Fujian Province,and studied the relationship in their.The re- sults showed:(1)All ZPNC were on acid side of ZPC and increased from top to bottom in soil profile.(2)The ZPNC of all horizons of paddy soil are lower than red earth,excepting the soils drived from salat parent material.(3)The ZPNC of percogenic paddy soils in W_1 hori- zon and periodically water-logged paddy soils in W_2 horizon are more higher than others.(4) δ_p has a negative terrelation trend with ZPNC.The change of ZPNC in different water type paddy soils were restricted by the humic matter accumulation and Fe oxide leaching or illuviation,the influence of Fe_o is most strong in theirs.(5)The ZPNC chang of paddy soils drived from parent material that content high or low Fe oxide are smaller than that middle, meanwhile,ZPNC were influenced by SiO_2% and SiO_2/(Al_2 O_3+Fe_2 O_3)in clay too.