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J. Jpn. Soc. Soil Phys.
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No. +*,, p. /-U0+ V,**0W

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 NaCl  *.,,
*Modelling of Irrigation Pattern andSoil Layers on Irrigation E$ciency
by Using HYDRUS-,D-.

01223 Kumar PIYUSH,

 :    /Takuma NOGUCHI, Taku NISHIMURA, Makoto KATO
Lanzhou Institute of Desert Research (Institute of
NH.-N  NO--N 

01223456789:2;
<ῌ=>012232;? @ABῌC!

Cold and Arid Zones), China LIU Xinmin
Numerical simulation using HYDRUS-,D was conducted to discuss water saving irrigation practice forcorn-growing ﬁeld in northwest China.

Convention-

al irrigation is not suitable compared to the watersaving irrigation as it is water saving.

The actual

DE5FGHFHIJKL M"NO#EPQ$

layering of soil of ﬁeld is simulated and is comparedR %ῌῌST NH.-N

with that of single layer soil assumption, which is

NO--N &

'U()'N *+ NH.-N

NO--N

commonly used to plan irrigation practice.

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NO--N XT /Y012TZ3

water uptake as well as irrigation e$ciency seemed

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W\

to be lower than that of layered soil under water : FHIJKL O#EP * ]I^_]601 `a601

saving irrigation.

 : Numerical simulation, HYDRUS-,D.

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 : QR12 U@ fV z{|}~G jMeasurements of Actual Thermal Propertiesof Takamatsuzuka Tumulus Soil
National Institute of Cultural Properties Tokyo
Magdi KHALIL, Takeshi ISHIZAKI
Environmental and Biological Engineering,
University of Tokyo Masaru MIZUGUCHI
There are several important mural paintings inR  +*, ¼ ,**0

58

templesandintumulusin

Asiancountries.

solute transfer.

Results were : +) Water and NO--N

Takamatsuzuka Tumulus was built with mural

distributions by Ultra Low Microirrigation were wellpaintings in the stone chamber around the end of 1th

estimated by the program, which can make the irri-

century or at the beginning of 2th centaury.

gation planning easy.

Be-,) Ultra Low Microirrigation

cause various fungi has recently appeared on thewas supposed to be appropriate for soils with highlime plaster wall on which precious paintings arewater permeability and limited irrigation water,drown together with intrusion of insects into thewhere utilization e$ciency of water and fertilizer

stone chamber, which seriously has damaged wall

can be higher and outﬂow of fertilizer can be smaller

paintings, It is very urgent to restore and conserve

than usual drip irrigation.

them with the relevant measures.

 : Ultra Low Microirrigation, HYDRUS-,D,

pose

protective

measures

In order to pro-againstfungi,

we

Water and solute transfer

performed a study of the thermal properties of the
Takamatsuzuka soil. Sampling of Takamatsuzuka

Hydrus,D ./0123
456789!:;<=soils powder was carried out to know the thermal
properties as well. Because of its high inside humid-

9:ij ;0k<= \7

ity and high water content of the lime plaster wall,>?@A

we tried to install cooling system to control inside;0k<= \7 lB C

humidity.

DEFmn lGHI : Takamatsuzuka Tumulus, mural paint-

WJ KLMNoN&pqrs7\7t7uvwx

ings, Thermal conductivityy #COP zQ R{&ST$UV$S  Hydrus,D &UVῌῌ
ECH,O 

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ῌ

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Decomposition and Nitrogen Mineralizationof Some Crop And Plant Biomass
United Graduate School of Agricultural Sciences,
Iwate University Eusufzai Moniruzzaman KHAN
Faculty of Agriculture, Iwate University
Takeki MAEDA, Atsumi FUJII
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