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1 W ETLAND SC IENCE Vol. 6 No. 2 June, , 2, 2, 2, 3 (1., ; 2., ; 3., ) : ( ), 5 15, 15 ; ; ; Q (4. 4 ), 1 2, : ; ; ; ; : S153 : A : (2008) [ 1 ], [ 2 ] [ 3 ], [ 4, 5 ] [ 3 ], [ 6 ], ( ),,, [ 4 ] [ 2, 4, 6 8 ],,, 1,,,, N N, E E, m, m,,,,, [ 9 ], , mm [ 10 ], : ; : : ( ) (973) (2005CB422005) : ( ),,,,, E2mail: wg638@163. com

2 230 6 (Ca rex m uliensis), ( Carex lasioca rpa ) ( Carex m eyeriana) ( Kobresia tibetica) (Scirpus distigm aticus) [ 9 ],,,, 50%,, [9 ], ( 4, ),,, ( 30%, 15% ) [9 ] , ( N, E) ( N, E), PVC ( 40 mm ) 10 cm ( ),, PVC 10 cm,,, ( [ 12 ], 5, 15, ) 3 (,, ) : PVC,, 5 d,, ( a) ; PVC,, PVC, ( c) ; ( 30% ; % ) ; ( b) ( 35% 40% ; 75% 78% ) ( 5, 15, ) 30 d, PVC,,,,, ( TOC), (LC) ( TN ), ph,, PVC 2. 2, [ 11, 12 ],, ph,,, [ 13 ] 2. 3 [ 4 ] : : N m in = (N 2 - N 1 ) d (1) (1), N m in [mg/ ( kg d) ], N 1 (mg/kg) ; N 2 (mg/kg) ; d : N nit = (N 2 - N 1 ) d (2) (2),N nit [mg/ (kg d) ]; N 1 (mg /kg) ; N 2 (mg/kg) ; d M icrosoft Excel 2000 SPSS 10. 0, SigmaPlot ( version 9. 2) Photoshop ( version 6. 0) 3 1 Table 1 Part of soil physical chem ical ph p roperties in Zoige W etland TOC (mg/ g) LC (mg/ g) TN (mg/ g) C /N ( g/cm 3 ) (% ) Table 2 Particle - size analysis of marsh soil and peat soil > in Zoige Wetland < (mm) (mm) (mm) (mm) (mm)

3 2 : , 2, 3, 5 15, 15, [ 4 ], [ mg/ ( kg d) ], 5 15, 15, 25,, 25, ;, [ mg/ ( kg d) ], 15,, mg/ (kg d), mg/ ( kg d), 5 15, 15 25, 35 ; 5 15, ;, mg/ ( kg d), mg/ ( kg d),, ( 1) 1 ( a: ; b: ; c: ) Fig. 1 The response of marsh soil and peat soil to temperatures and water moisture in Zoige W etland, (5 15 ),,,,,,

4 232 6,,,, [ 4, 6, 8 ], ; R p ; T V itousek P M [ 16 ],, 3. 3,, ( 1),,, ;,,,,, 2,,, C /N C /N, ;, 25 35,,, N 2 O, N 2 O [ 20 ], 3. 4 [ 4, 6 ],,, ( n = 36) : Rm = T W T W W T 2 (R 2 = , p < 0. 01) (3) Rp = T W T W W T 2 (R 2 = , p < 0. 01) (4) Rm = T W T W W T 2 (R 2 = , p < 0. 01) (5) Rp = T W T W W T 2 (R 2 = , p < 0. 01) (6) (3) ( 6), Rm ; R p ; Rm ; W,,,, 3. 5 Q 10 (Q 10 ) [ 17 ], 3 Q 10 ( 3 ), Q , Q , 15 25, ; Q , 15 25, 25 35, Q 10, Q 10, 15 25, Q 10, 4. 4, 15 25,,, 15 25,, Campbell Q 10, Q 10 2 [ 18 ], Sierra J Marba n L [ 19 ] 2 Q 10 4, Q (4. 4 ), 1 2, 15 25

5 2 : Q 10 Table 4 Q 10 values for the net nitrogen m ineralization rates of marsh soil and peat soil ( a) ( b) ( c) (1) 5 15, 15 ; (2) ; (3) ; Q (4. 4 ), 1 2, [ 1 ]. [ J ]. 2004, 25 (3) : [ 2 ],,. [ J ]., 2003, 34 (6) : [ 3 ],,,. [ J ]., 2001, 21 (7) : [ 4 ],. [ J ]., 2001, 12 (4) : [ 5 ] Quemada M, Cabrera M L Temperature and moisture effects on C and N mineralization from surface app lied clover res2 idue[ J ]. Plant and soil, 189: [ 6 ],,. [ J ]., 2004, 24 ( 11) : [ 7 ],,,. [ J ]., 2001, 25 (1) : [ 8 ],,,. [ J ]., 2004, 10 (2) : [ 9 ]. [M ]. : [ 10 ]. [ J ]., 2003, 1 (2) : [ 11 ] Loginow W, W isniewski W, Gonet S S, et al Fractiona2 tion of organic carbon based on susceptibility to oxidation [ J ]. Polish Journal of Soil Science, 20: [ 12 ] B lair G J, Lefroy R D B, L isle L Soil carbon fractions based on their degree of oxidation and the development of a car2 bon management index for agricultural system s [ J ]. journal of agricultural research, 46: Australian [ 13 ]. [M ]. :, [ 14 ] Gale PM, Gilmour J T Carbon and nitrogen m ineralization kinetics for poultry litter [ J ]. J. Environ. Qual., 15: [ 15 ],,,. [ J ]., 2000, 24 (6) : [ 16 ] V itousek P M, Gosz J R, Grier C C, et al A comparative analysis of potential nitrification and nitrate mobility in forest eco2 system s[ J ]. Ecol. Monogr., 52: [ 17 ] Dalias P, Anderson J M, Bottner P, et al Temperature re2 sponses of net N m ineralization and nitrification in conifer forest soils incubated under standard laboratory conditions[ J ]. ology & B iochem istry, 34: SoilB i2 [ 18 ] Katterer T, Reichstein M, Andren O, et al Temperature dependence of organic matter decomposition: A critical review u2 sing literature data analyzed with different models[ J ]. and Fertility of Soils, 27: B iology [ 19 ] Sierra J, Marba n L N itrogen m ineralization pattern of an Oxisol of Guadeloupe ( FW I) [ J ]. ca Journal, 64: Soil Science Society ofameri2 [ 20 ]. [ J ]., 2005, 3 (4) :

6 234 6 The Respon se of So il N itrogen M inera liza tion to So il Tem pera ture and So ilm o isture in Zo ige A lp ine W etland GAO Jun2Q in 1, 2, OUYANG Hua 2, ZHANG Feng 2,WANG Chun2Mei 3 ( 1. College of N ature Conservation, B eijing Forest U niversity, B eijing , P. R. China; 2. Institute of Geographic Sciences and N atural Resources Research, Chinese A cadem y of Sciences, B eijing , P. R. China; 3. College of Environm ental Science and Engineering, B eijing Forest U niversity, B eijing , P. R. China) Abstract: Response of nitrogen m ineralization to soil temperatures and soil moisture in two types of alp ine wet2 lands (marsh soil and peat soil) was measured in laboratory incubation w ith undisturbed cores. The response of net nitrogen m ineralization rate to soil temperatures which changed from 5 to 15 was low but high when temperature over 15. The response of net nitrogen m ineralization rate to soil temperature was more sensitive in peat soils than in marsh soils. The Q 10 values for nitrogen m ineralization were about 4. 4 at in inunda2 tion, in other conditions, which showed that the most sensitive scope for response of nitrogen m inerali2 zation to soil temperature was at Keywords: alp ine wetland; m arsh soil; peat soil; nitrogen m ineralization