ef Ž no. 3/,p.+-,* · adsorptionofnitrogenchemicalfertilizeronvolcanicashsoiland...

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腇腌腉腔腎腃腀腁腅腑腐腍腆腊腖腗腄腋腒腂腈腓腕腏 膼臉 *膆臧膹臅* 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 +腇腅腈腆 臙臎膶膅膏至腚膸腉腐腙膑腑腣臦膞膴膤膍膡膗 臒膬腬腷腭腂,**,腠腢膛臬腚膱腧腷腵腱腩腴膸 腉腐臺膅腦腽腑腣腗臸臄 /, 2, ++ 臬臣腖腒腤腓腤 +/2, +/3, +.0 t 腗臔腌腘臺膅腛膢腡腤腘腉腍腚腔腞臯臘臥腖腚臙臎膶膅膏至膺臋腗臩腚膳至腋 膦腥腤腕腉腣腗臁臞腎腤臙臎膶膅膏至腙腠腣臘膄 膇臉臥腚膃臊腋腺臌腗腏腕膟臭腎腤腣膿膙腙腈腣腗 臱臖腎腤腣腝腔腚臵臝臯腚臤膾膝臹臇膐膨腛膪腳腫臤腋 .1臤膾臼臍臜膫膵膚臍膩膘膔膊+33+腦臈腞腕腉腣腒腍腖臓致臟腘臙臎膶膅膏至腖腈腣膱腧腷腵腱 腩腴 腅腃NH., SO.腆腁 腊腠腜膽膱腧腷腵腱腩 NH. NO-膁腦膈膯膋臤膾腙膜腢臻腏臠膆腑腣腲腯腮腉腔 膷膣腦膦腉膽膱腧腷腵腱腩腴腨腪腷腚膕臚 臤膾膂膒pH 臺膅臥腦臲膎腏腔腏腕腍腤腡腚臐臞臗腗膨臄膱膅臷腚膉臡膠臨腚腔腞腙 膌臰腎腤腔致膭臑臆臄腵腰腶Barrow et al. +321腉腕膰膻腏腔膉臡臣腟腨腪腷膕臚臥腦臲膎腏腾腨腪腷膕臚腟膂膒腙臏腻腋臆腐腣腼腦膥膮腏腔腹膧膱腧腷腵腱腩腴膽膱腧腷腵腱 腩腴膁腦腒腤腓腤膽腸膁腗膓腏腝腑* 膀臢膖臔膏臮膏臶 -,+2/*/ 膀臢膖膲-/* 腉腁腋腁腊 : 臙臎膶膅膏至膈膯膋臤膾pH腨腪腷膕臚膉臡自臃 J. Jpn. Soc. Soil Phys. 臤膾腚臷No. 3/, p. +-,* ,**-

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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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pH RH, *SpH RKClS

/40/

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��+ ����P$Z[Fig. + Electric charge characteristics of soil.

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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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Fig. 2 Comparison of the experimental anion ad-

sorption with calculated valuesin the a

plane by four plane model for each solu-

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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

+4-2*

*4/,.

+»+*0

+4*-*

,4,3»+*-

+4**»+*n0

-410*

,4/,3

.4*+0

.4++0

*4+**

2410»+*/

,401»+*.

340,»+*/

34-0»+*n3

.41-»+*,

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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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