A modelling soil column experiment was made to study the influence of soil water regime on the eluviation and illuviation of mineral elements in soil and its relation to the growth of rice and wheat.The conclusions are as follows:1.After submerging,the mineral elements were mobilized,causing an increase in concentration of these elements in soil solution,particularly in iron and manganese.The mineral elements were subject to eluviation.The amount of the elements accumulated and eluviated showed a sequence of Fe> Ca,SiO2> K> Al,P,Mn,Mg.2.The liner regression equations showed that the main factors affecting the mobilization and eluviation of elements were percolation of water and soil Eh in nce growing season 3.The results of principal component analysis revealed that the mam soil genetic processes in early stage of submergence were activation and eluviation of mineral elements,relative accumulation of silica and aluminium and increase of soil nutrients.4.Although the soil was submerged only one year,the differentiation of Fe and Mn in profile had already appeared.Fe and Mn were eluviated in surface layer,illuviated in the middle of profile.5.The experiment results proved that water regime affected the growth of rice and wheat the permeable soil column (water percolation during the rice growing season being about 15 mm per day,and ground water table being controlled at 70-80 cm during the wheat growing season) was favorable for the growth of rice and wheat.
杨林章,徐琪,熊毅.水分状况对红壤母质中物质移动及稻麦生物量的影响[J].土壤学报,1987,24(3):199-209. Yang Linzhang, Xu Qi, Hseung Yi. EFFECT OF SOIL WATER CONDITION ON THE MIGRATION OF MINERAL ELEMENTS AND THE CROP GROWTH IN PADDY SOILS DERIVED FROM RED EARTH[J]. Acta Pedologica Sinica,1987,24(3):199-209.复制