Dear Heping Zhang:
The answer is "yes" there are two settings that kill the crop with frost,
and they are easily changed or modified, by you if you want.
I have attached a new species file, CHGRO980.SPE, in which two variables
have been changed, FREEZ1 from -2.22 C to -9.00 C, and FREEZ2 from -6.67 C
to -9.00 C. This will prevent the crop from killing if Tmin is above -9.00
C. This is an ASCII file that can be edited, so you can set those two
values where you want them to be. The FREEZ1 kills all foliage but allows
phenology to go to conclusion, whereas FREEZ2 stops everything. Copy this
file into your DSSAT35\GENOTYPE subdirectory.
I've sent this response also to Dr. Hoogenboom who was one of the modifiers
of CROPGRO for chickpea. He may know if the -9.00 C is reasonable.
Ken Boote
At 09:59 AM 1/30/01 +0800, you wrote:
>Dear colleague,
>
>I am doing a simulation of long-term wheat-based cropping systems in Syria
>using DSSAT sequence module. One of the crops in the rotation is chickpea.
>When DSSAT runs to chickpea module, chickpea dies due to frost in winter.
>This is not the case in Syria and chickpea grain yield was between 420 and
>1300 kg/ha. Although chickpea is usually planted in early spring in Northern
>Syria, ICARDA has demonstrated that winter sowing chickpea has significantly
>improved crop yield. The lowest temperature experience by chickpea was about
>-9 degrees. I wonder if in the chickpea module has set a critical
>temperature of 0 for crop to die. Is there anyway to change parameters in
>crop genotype coefficients to let crop survive the frost? Your help will be
>appreciated.
>
>Thanks,
>
>Heping Zhang
>
>CSIRO Land and Water
>Private Bag, PO Wembley
>WA 6014
*CHICKPEA SPECIES COEFFICIENTS - CRGRO980 MODEL
!*PHOTOSYNTHESIS PARAMETERS
40.00 75.00 0.75 PARMAX,PHTMAX,KCAN
80.0 2.09 .0105 CCMP,CCMAX,CCEFF; CO2 EFFECT ON PGCAN
2.20 5.00 20.0 20.0 QDR FNPGN(4),TYPPGN-LEAF N EFFECT ON PG
5.00 25.0 34.0 48.0 LIN FNPGT(4),TYPPGT-TEMP EFFECT-CANOPY PG
0.0 8.0 40.0 44.0 48.0 55.0 XLMAXT (6 VALUES)
0.0 0.0 1.0 0.8 0.0 0.0 YLMAXT (6 VALUES)
2.00 20.00 50.0 60.0 QDR FNPGL(4),TYPPGL-TMIN EFFECT-LEAF PG
.0541 0.20 0.80 2.0 PGEFF SCV KDIF, LFANGB
.0045 .0006 .2500 5.00 1.70 SLWREF,SLWSLO,NSLOPE,LNREF,PGREF
0.0 .001 .002 .003 .0035 .004 .005 .006 .008 .010 XPGSLW(1-10)
.162 .679 .867 .966 1.000 1.027 1.069 1.100 1.141 1.167 YPGSLW(1-10)
!*RESPIRATION PARAMETERS
3.5E-04 .0030 RES30C,R30C2
2.556 2.556 .360 2.830 RNO3C,RNH4C,RPRO,RFIXN
1.242 3.106 2.174 .929 0.05 1.13 RCH20,RLIP,RLIG,ROA,RMIN,PCH2O
!*PLANT COMPOSITION VALUES
.340 .268 .166 .165 .110 .042 PROLFI,PROLFG,PROLFF,PROSTI,PROSTG,PROSTF
.142 .102 .056 .154 .145 .069 PRORTI,PRORTG,PRORTF,PROSHI,PROSHG,PROSHF
.216 .216 .300 .021 .056 0.9 SDPROS,SDPROG,PRONOD,PROMIN,PROMAX,THETA
.409 .600 .661 .573 .640 .480 PCARLF,PCARST,PCARRT,PCARSH,PCARSD,PCARNO
.034 .024 .020 .016 .050 PLIPLF,PLIPST,PLIPRT,PLIPSH,PLIPNO
.070 .070 .070 .150 .015 .070 PLIGLF,PLIGST,PLIGRT,PLIGSH,PLIGSD,PLIGNO
.050 .050 .050 .040 .040 .050 POALF,POAST,POART,POASH,POASD,POANO
.097 .091 .057 .067 .041 .050 PMINLF,PMINST,PMINRT,PMINSH,PMINSD,PMINNO
!*SEED COMPOSITION VALUES
7.168 23.65 0.908 0.180 LIPTB,LIPOPT,SLOSUM*100,CARMIN
!*CARBON AND NITROGEN MINING PARAMETERS
0.100 0.70 .320 .060 0.40 0.15 CMOBMX,CADSTF,CADPR1,NMOBMX,NVSMOB,NRCVR
SD XPODF
0.03 0.06 0.03 0.06 ALPHL,ALPHS,ALPHR,ALPHSH
!*NITROGEN FIXATION PARAMETERS
0.045 0.200 0.015 0.0 0.04 0.05 SNACTM,NODRGM,DWNODI,TTFIX,NDTHMX,CNODCR
11.00 28.0 34.0 44.0 LIN FNNGT(4),TYPNGT-TEMP EFF ON NOD GROWTH
8.00 25.0 34.0 44.0 LIN FNFXT(4),TYPFXT-TEMP EFF ON N FIX
-.15 0.35 1.00 10.0 LIN FNFXD(4),TYPFXD-REL SW-DRY EFF ON N FIX
-.02 .001 1.00 2.00 LIN FNFXW(4),TYPFXW-REL SW-WET EFF ON N FIX
0.00 0.10 1.00 0.00 INL FNFXA(4),TYPFXA-REL DEV-AGE EFF ON N FIX
!*VEGETATIVE PARTITIONING PARAMETERS
0.0 3.3 5.4 7.5 9.6 15.0 30.0 40.0 XLEAF VALUES
0.30 0.35 0.37 0.45 0.45 0.45 0.45 0.45 YLEAF VALUES
0.25 0.25 0.30 0.33 0.33 0.33 0.33 0.33 YSTEM VALUES
0.83 0.21 0.40 0.10 1.00 0.05 WTFSD,PORPT,FRSTMF,FRLFF,ATOP,FRCNOD
0.70 FRLFMX
!*LEAF GROWTH PARAMETERS
100. 180. 10.0 5.0 0.0 FINREF,SLAREF,SIZREF,VSSINK,EVMODC
540. 220.0 -.047 1.50 SLAMAX,SLAMIN,SLAPAR,TURSLA
0.0 1.0 2.0 3.3 5.4 7.5 XVGROW(1-6), VSTAGE VALUES
0.0 28.7 57.5 99.6 188.7 375.8 YVREF(1-6), LEAF AREA VALUES,CM2
-50.0 00.0 21.0 30.0 60.0 XSLATM(1-5),TEMP VALUES
0.00 0.00 1.00 1.00 1.00 YSLATM(1-5),EFFECT ON SLA
!*LEAF SENESCENCE FACTORS
! 0.60 0.20 0.02 -2.22 -6.67 old SENRTE,SENRT2,SENDAY,FREEZ1,FREEZ2
0.60 0.20 0.02 -9.00 -9.00 SENRTE,SENRT2,SENDAY,FREEZ1,FREEZ2
0.01 50.0 ICMP,TCMP(Light comp, time constant-senes)
! .......XSTAGE......... .......XSENMX.........
0.0 5.0 14.0 50.0 3.0 5.0 10.0 30.0
! .......SENPOR......... .......SENMAX.........
0.0 0.0 0.10 0.12 0.0 0.4 0.5 0.5
!*ROOT PARAMETERS
25.0 7500. .0100 0.1 0.01 1.50 0.04 RTDEPI,RFAC1,RTSEN,RLDSM,RTSDF,RWUEP1,RWUMX
0.0 3.00 3.0 3.00 6.0 3.00 30.0 3.00 XRTFAC,YRTFAC
0.006 0.006 0.001 0.10 RTNO3,RTNH4,PORMIN,RTEXF
!*SEED AND SHELL GROWTH PARAMETERS
0.30 0.50 0.00 100. SETMAX,SRMAX,RFLWAB,XMPAGE
15.0 1.0 0.15 DSWBAR,XFRMAX,SHLAG
8.0 21.0 26.5 45.0 QDR FNPDT(1-4),TYPPDT-TEMP EFFECT ON POD SET
6.0 21.0 23.5 41.0 QDR FNSDT(1-4),TYPSDT-TEMP EFFECT ON SD GRWTH
0.00 6.00 20.00 33.00 46.00 60.00 XXFTEM(1-6),TEMPERATURES
0.00 1.00 1.00 1.00 1.00 1.00 YXFTEM(1-6),REL CHG IN PARTIT
0.00 0.01 1.00 1.10 XSWFAC(1-4)
1.00 1.00 1.00 1.00 YSWFAC(1-4)
-.60 0.00 0.70 1.00 1.10 XSWBAR(1-5),REL WATER TOPSOIL
1.00 1.00 1.00 1.00 1.00 YSWBAR(1-5),EFFECT ON PNUT PEGGING
0.00 0.50 0.75 1.00 XTRFAC(1-4),TURFAC
0.00 1.00 1.00 0.00 YTRFAC(1-4),ENHANCE REPROD. GROWTH
!*POD LOSS PARAMETERS
N 6.0 .3961 -.865 3.405 0.102 DETACH,DWC,PR1DET,PR2DET,XP1DET,XP2DET
!*PHENOLOGY PARAMETERS
! TB TO1 TO2 TM I
0. 20.0 32.0 55.0 1 VEGETATIVE DEVELOPMENT
0. 25.0 25.0 50.0 2 EARLY REPRODUCTIVE DEVELOPMENT
0. 25.0 25.0 50.0 3 LATE REPRODUCTIVE DEVELOPMENT
!FOLLOWING LINE: STAGE; REF STAGE; PHOTOPERIOD FUNCTION; TEMPERATURE FUNCT;
!POINTER TO VEGD(1) OR REPDA(2) OR REPDB(3) TEMP SENS; SENS TO WATER;N; AND P
1 1 NON LIN 1 0.00 0.00 0.00 PLANT(STG 1) TO EMERG(STG 2) PHASE
2 2 NON LIN 1 0.00 0.00 0.00 EMERG(STG 2) TO V1(STG 3) PHASE
3 2 NON LIN 1 0.00 0.00 0.00 EMERG(STG 2) TO END JV(STG 4) PHASE
4 4 LON SIN 2 0.00 0.00 0.00 END JV(STG 4) TO FL IND(STG 5) PHASE
5 5 LON SIN 2 0.00 0.00 0.00 FL IND(STG 5) TO 1ST FL(STG 6) PHASE
6 6 NON SIN 2 1.00 0.00 0.00 1ST FL(STG 6) TO 1ST PEG(STG 7) PHASE
7 6 NON SIN 2 1.00 0.00 0.00 1ST FL(STG 6) TO 1ST POD(STG 8) PHASE
8 6 NON SIN 2 1.00 0.00 0.00 1ST FL(STG 6) TO 1ST SD(STG 9) PHASE
9 9 NON SIN 3 1.00 0.00 0.00 1ST SD(STG 9) TO LST SD(STG 10) PHASE
10 9 NON SIN 3 1.00 0.00 0.00 1ST SD(STG 9) TO PH MAT(STG 11) PHASE
11 11 NON NON 1 0.00 0.00 0.00 PH MAT(STG 11) TO H-MAT(STG 12) PHASE
12 6 NON SIN 2 1.00 0.00 0.00 1ST FL(STG 6) TO LST VST(STG 13) PHASE
13 6 NON SIN 2 1.00 0.00 0.00 1ST FL(STG 6) TO LST LF(STG 14) PHASE
!*CANOPY HEIGHT AND WIDTH GROWTH PARAMETERS
! VSTAGE, FOLLOWED BY INTERNODE LENGTH PER NODE, THEN CANOPY WIDTH PER NODE
0.00 1.96 6.75 8.00 10.00 12.00 14.00 16.00 20.00 40.00 XVSHT(1-10)
.0210 .0210 .0210 .0210 .0280 .0280 .0280 .0260 .0210 .0150 YVSHT(1-10)
.0300 .0300 .0450 .0520 .0630 .0630 .0630 .0520 .0420 .0300 YVSWH(1-10)
-50.0 00.0 11.0 26.0 60.0 XHWTEM(1-5),TEMPERATURES
0.05 0.05 0.40 1.00 1.00 YHWTEM(1-5),RELATIVE EXPAN
0.00 5.00 7.50 10.00 15.00 20.00 30.00 80.00 XHWPAR(1-8),PAR VALUES
4.00 2.00 1.50 1.25 1.05 1.00 1.00 1.00 YHWPAR(1-8),RELATIVE EXPAN
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