【摘要】 白浆土是形成于北温带温凉较湿润气候下的酸性土壤,红壤是形成于亚热带季风气候区的酸性土壤,二者的形成过程不同,土壤淋溶的程度和方式亦有差异。白浆土上层的酸溶性无定形铁高于红壤,40cm 以下的土层则相反,白浆土重结晶铁为无定形铁的2～6倍,红壤则为10多倍。白浆土的铁锰没有明显的淋溶趋势,而多在本层土壤的孔隙中集中。两种土壤的全铁量比全锰都高,高一个数量级,二者锰的差异小于铁的差异。白浆土两种形态锰的含量,均略高于红壤。白浆土白浆层锰的含量略高于黑土层,淀积层较低,红壤的游离锰未见有淋溶移动的趋势。红壤酸性铝高于白浆土,铝比铁有更多的存在于无定形部分中。活化度。红土的游离铁多于白浆土。以重结晶态者为主,活化度反低于白浆土。两者土壤游离锰的活化度差异不大。更多还原

【Abstract】 Albic planosol(A.P.)is formed under temperate,sub humid cli- mate of north temperate zone,and red earth(R.E.)is formed under subtropic monsoon climate.Both are acidic soils but with differnt soil forming process, the degree and forms of leaching are thus different. The acid soluble amorphous iron in upper soil layers,A and B,are higher in A.P.,but the soil below 40cm is opposite to this and higher in R.E.,In A. P.the recrystallized iron is 2～6 times as much to the amorphous iron,but in R.E.there is more than ten times.There is no distinct tendency of Fe and Mn leaching,and concentrating in the pores or fissures only. The Fe content is one grade higher than Mn.,and the difference of Mn be- tween these two soils is less than that of Fe.The contents of both forms of Mn in A.p.are higher than in R.E.,Within the profile of A.P.there is more Mn in albic layer than in surface layer,and the illuviated horizon is the lowest, there is no tendency of leaching of isolated Mn and that can clearly be seen in R.E. The acid soluble Al in R.E.is higher than in A.P.,and more Al than Fe is existing in the amorphous part. Degree of activation:more isolated Fe in R.E.than in A.P.is found,but mostly recrystallized form of the former,thus the degree of activation is lower than the later.There is little difference in degree of activation of isolated Mn between these two soils.更多还原