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TRANSCRIPT
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Adsorption of Nitrogen Chemical Fertilizer on Volcanic Ash Soil and
Electric Charge Characteristics
Susumu MATSUKAWA* and Hidemasa KATOU*
* Faculty of Agriculture, Utsunomiya University, Utsunomiya -,+�2/*/, Japan
Abstract
Ammonium sulfate or ammonium nitrate solution was added repetitiously in volcanic ash soil.
The di#erence in amount of anion adsorption or cation desorption, and the change in pH were
compared with the simulated results by the four plane model. pH of soil solution was lowered by
the addition of the ammonium nitrate solution, and pH was increased in the ammonium sulfate
solution. The amount of desorption of the base cation in the ammonium nitrate solution was
large than that of ammonium sulfate solution addition.
The adsorbed amount of sulfate ion was increased, even if pH rose in the ammonium sulfate
solution addition. The amount of sulfate ion adsorption was depended on concentration, and
that didn’t depend on hydrogen ion concentration by adaptation of regression equation that
composed with anion and hydrogen ion concentration. Sulfate and nitrate ion adsorption
calculated by the four plain model were corresponded to the measurements well. Comparing the
simulated charge density at each plain, addition of ammonium sulfate solution was large than
that of ammonium nitrate solution addition. In the case of ammonium sulfate solution addtion,
amount of hydrogen ion adsorption on S plain was large than that of hydroxyl ion compared with
ammonium nitrate solution addition. These simulated results correspond with the pH measure-
ments.
Key words : nitrogen chemical fertilizer, volcanic ash soil, pH, ion adsorption, electric charge
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J. Jpn. Soc. Soil Phys.
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��- B0IJ]�MNOPQ�RSFig. - Anion concentration change with repeti-
tious ammonium sulfate solution addition.
��, B0� /0CDIJ<X� pHRSFig. , pH change with repetitious ammonium
sulfate and ammonium nitrate solution
addition.
��/ B0� /0CDIJ]�Mg� K�¢��gFig. / Ammoniu$ sulfate and Mg, Na accumu-
lation desorption quantity in the ammo-
nium nitrate solution addition.
��. /0CDIJ]�sNOPQ�RSFig. . Cation concentration change with repeti-
tious ammonium nitrate solution addition.
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Alva et al. (+33*) : Reactions of gypsum or phospho-
gypsum in highly weathered acid subsoil, Soil
Sci Soc. Am. J., /. : 33-�332.
Barrow et al. (+321) : A comparison of models for
describing the adsorption of anions on variable
charge mineral surface, J. Colloid Interface Sci.,
++3 : ,-0�,/*.
Barrow, N.J. (+321) : Reactions with Variable-Charge
Soils. Martinus Nijho# Publishers. pp. +,/�+-,,
USA.
Bolan and Barrow (+32.) : Modeling the e#ect of
phosphate and other anions on the surface
charge of variable charge oxides. J. Soil Sci., -/ :
,1-�,2+.
Bowden et al. (+32*) : Describing the adsorption of
phosphate, citrate and selenate on a variable-
charge mineral surface. Aust. J. Soil Res., +2 : .3�0*.
Bowden et al. (+311) : Ionic adsorption on variable
charge mineral surfaces, Aust. J. Sol. Sci., +/ :
+,+�+-0.
�+* *+" ,+��01g� SP���� H"OH89�
Fig. +* Calculated H�, OH� adsorption on S
plane in relation to pH.
�- ²³´µ¶�·¸~Table - Most suitable value for each parameter
²³´µ¶ ,+ *+
NS ¹mmolcmn,º
NT ¹mmo+cmn,º
Csa ¹Fmn,ºCab ¹Fmn,ºCbd ¹Fmn,ºKH ¹Lmoln+ºKOH ¹Lmoln+ºKCat ¹Lmoln+ºKani ¹Lmoln+º
*420.
-43+3
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����������� +33+� : �������������� pp. -0�-1� ���� ���
Goldberg (+33,) : Use of surface complexation models
in soil chemical systems, Adv, Agron, .1 : ,--�-,3.
!"#�$%&' +32*� : ���()�*+,-./01 2 ,3� ()�*,45/6789:;�<=>?�@A� ����BCD�E� /+ : 3/�+*+.
Kamewada (+33/) : Increase in Cation Adsorption
Induced by Surface Complexation of Surfate on
Andisols and Prediction by “Four-Plane Model”,
Soil Sci. Plant Nutr., ., (.) : 12/�133.
FG&HI +32,� : JKL���MNO�PQRS?�����BCD�E� /- : .11�.1/.
TU01��V9WX ,**,� : YZ[\],^/�_`ab���cd efg`efh�_`��ie
fjkl� : pp. 0,�01� ���mn oI +33+� : pqrst,^/�uvXWwxyz{|} SALS� pp. 33�++*� ��~D�������
m���I +33/� : ����ef��t� pp. +0/�+03���~D���� ���
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