`5O :RS 5TU : WY 2)*! 1363 NTS: > O,Z [ 5 \,2 V _ $ M NT: R >, R TS: 5 > ^ S T(] ^), `1 52S Z[5 \,2 V M TP: 5 > ^S T (] ^), 10N V ^V", 10cm, 30cm, 50c

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1 `32 `5O N F JOURNALOFDESERT RESEARCH Vol.32 No.5 Sep.2012 : X(2012) !"# $%&' 1,2,3, 1,2,3, 1,2,3, 3, 3, 3 (1. :; " 5 A ;2. : ; ' B C D A ;3. :; ) :3HIJKLIM2FNO 5 >, PQ6aRS 5TUV0~30cm WXWY2 WY Z[\ WY] # ^_`abi c, 5,R S 5 T U 0~30cm W Y 5bar 15bar, 3bar 1bar 0.5bar ;Gardner 2 c 0.5~15bar, C 2 犛 = 犃 θ - 犅, 2 5 awy ; 5 5 a0~5cm W X, a W Y Z \; WY] # ^ 23: 5;WY ;WY 45!6:S ::A F W M R 400 mm,,s, M 5, X WY,O,#, ^, 80% 2 X W Y! [1-2] : ; 2! " #$IJKLIM2%&' ars 5TUI# >, O! R 5 TU WY 5 " " ( 2 ) *,+,- a 2 >. [3-9] /! P Q =URS 5 T U 6aV 2 W Y WY Z[\ WY] # ^ (_`ab I,0 1 M2 5, : ;" 2 Q ; 1.1 <= > F W M2IJ5% &'6789 M:F; M, 2000m, <=592.5kJ cm -2,>? ; 6.4, 0 A ; , 10 A; ;BO140d 390.9mm, 1531mm, C \2.53,80% D^2 365mm,E 24.3%, 2 :;M WY 2 W,W,W X F, G,H I J;0~200cm WY 1.17g cm -3,KL ^7.3% 1.2 >?@ I# >M$2001 8N,O 5 (? P 52 QR W P W ; P 52 Q R P W P ) S T 6,4,UVMWX, M A 4 m 20m Y > %2 5 : T: 5R > Z[\,V] ^ 8N\,V ``1 5,8Na 9 N T_ ` ` 2 3 5, 4 20cm,10 cm 5cm 9N`3 V^,10 NbcZ c^, W M 2 5 ()*+: ;,-*+: /01: ( , )!"#$ %& ( )' : (1976 ),, (),*+,,-.,/01 " 2! cailq@gsau.edu.cn 3456:789( zhangrz@gsau.edu.cn)

2 `5O :RS 5TU : WY 2)*! 1363 NTS: > O,Z [ 5 \,2 V _ $ M NT: R >, R TS: 5 > ^ S T(] ^), `1 52S Z[5 \,2 V M TP: 5 > ^S T (] ^), 10N V ^V", 10cm, 30cm, 50cm, `5 NTP: > S TP Z [, \,V^ [ 1.3 ABC D 2 IJ35, 3NF, kg hm -2,U : 105 kg hm -2,P 2O 5105kg hm -2 ( + ); : 1, 4 N, 180 kg hm -2,U : 20kg hm -2,P 2O 5105 kg hm -2 ( + H ) T NT TS NTS F:; 2 V U, ` 20cm, ` 22.5 cm,tp NTP 2 V U, 25cm, 12cm, 50cm, 7cm N >,Z[5 6,TS NTS 2 2, V 10cm G $ M, 6750kg hm -2,TP NTP 2 40 cm,0.015mm F2 1.4 E N \,V, S M W UV-0~30cm WX2W 5 GV,, D - 0~5 5~10 10~30cm WXW S $ 1)WY : [10] 2) Z[\:D [10] 3) :D [10] 4)] # ^: [11] 1.6 FGH O Microsoft Excel, SPSS13.0._` > 2 IJ!K 2.1!LMNO WY (Soilmoisturecharacteris ticcurves,smcc), awy WY (Soilwatercontent,SWC) 2,! WY WY _`WY I 2 0 /2 Y WY 2 E W Y U \,VRS 5T U 0~30cm WY 2bIc, 5,R S 5 T U 0~30cm WY (Soilwatersuction, SWS) 5bar 15bar, 3bar 1 bar 0.5bar ( 3, 4) >, 5 3bar,S 0~30cm WY R, P W P, 1bar,NT TS TP 2WY T 2.56 <(16.4%) 2.30 <(14.6%), 0.5bar,NTP NTS 2WY 2.75 <(13.4%), 5%2 ; W P W, 1 bar,nt TP 2 W Y 2.26 <(14.7%), 0.5bar,NT TP 2WY 1.53 <(7.3%), 5%2 5 2, WY S R,S HPQ6a2 5, P W P,NT TP 0~ 30cm WY 2 1bar, 0.5bar,!,- 2 NTP 0~30cm W Y 2 $ NTS 2; W

3 1364 F `32 P W,NT TP 0~30cm WY 2 1bar 5 2, WY RS 5TU 0~30cm WY E Fig.1 The0~30cmsoilmoisturecharacteristiccurvesunderwheat pea wheat rotationanddiferentconservationtilagetreatments 2 5 RS 5TU 0~30cm WY E Fig.2 The0~30cmsoilmoisturecharacteristiccurvesunderpea wheat pea rotationanddiferentconservationtilagetreatments 3 5 RS 5TU 0~30cm WY E Fig.3 The0~30cmsoilmoisturecharacteristiccurvesatlowsoilwatersuctionrangeunder wheat pea wheatrotationanddiferentconservationtilagetreatments

4 `5O :RS 5TU : WY 2)*! RS 5TU 0~30cm WY E Fig.4 The0~30cmsoilmoisturecharacteristiccurvesatlowsoilwatersuctionrangeunder pea wheat pearotationanddiferentconservationtilagetreatments 2.2!LMNO 3, $ WY 2W Y ( 犛 ) WY (θ) Gard ner 2 [12],_ 犛 = 犃 θ - 犅, F 犃, _ 2, 犃, WY 2 2, b 2,!WY 2 2 WY / 2 [13-14] 1. W Y 2!c, RS 5 S WY W Y 2 _` 2 P1 Q0~30 犮犿 RS( 犛 )T UVW V(θ)X -Y 犜犪犫犲 1 犚犲犵狉犲狊狅狀犳狌狀犮狅狀狊犳狀犵犺犲狉犲犪狅狀狊犺狆犫犲狑犲犲狀狊狅狑犪犲狉狊狌犮狅狀犪狀犱狊狅狑犪犲狉犮狅狀犲狀狅犳 0~30 犮犿狊狅犪狔犲狉狌狀犱犲狉犱犳犲狉犲狀犪犵犲狉犲犪犿犲狀狊 5 5 T 犛 =5286.3θ NT 犛 =6808.4θ TS 犛 =5657.7θ NTS 犛 =9940.8θ TP 犛 =6735.8θ NTP 犛 =7025.4θ T 犛 =6614θ NT 犛 =6358.6θ TS 犛 =5317.2θ NTS 犛 =7007.9θ TP 犛 =6540θ NTP 犛 =9418.1θ : ; , 5 S WY WY 2!, WY 2 C " " #2,1 RS 5TU WY 2 _`$%, #WY,NTS NTP 2! F 犃 2, H 6a2, 0~30cm WX2 2.3 = 2, H 6a2 V, \, V b I 2 TS NTS 0~5cm WX $, & :15 \, ', WY 2 ( ) Z [ \ *,+=\,& ;2 52 &, XWY, WYc-.I, X WY" 5 b/01& 2)* Y 2 ;3 C XWY", 2 \ $WY 2 \,1 a X2 5~10cm W X 5 RS:W P W 5 S ; P W P 5 NTS $ T 10~30cm W X, 5 S WY 2)* X 2,W P W 5 S 0~ 5cm 2 Z\ TS,P W P 5 S 0~5cm2 Z \ NTS

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