1998, 22 (6) 481488 A cta Phytoecolog ica S in ica α Ξ (, 666303) () () 3601909thm - 2, : 352. 563thm - 2 (97. 69% )41737thm - 2 (1131% )31108t hm - 2 (0186% )01501thm - 2 (0114% ) : 2411270thm - 2 (68143% )691614thm - 2 (19175% ) 371287thm - 2 (10157% )41392thm - 2 (1125% );, 2080cm 6, 2551460thm - 2 (72146% ); : I 2191365thm - 2 (62122% )g 1071743thm - 2 (30156% )g 251455thm - 2 (7122% ); 015% 26, 5% (P om etia tom en2 tosa) (19167% )(B arring tonia m acrostachy a) (5144% )(T erm inalia m y riocarp a ) (5127% ), 51724 B IOM ASS AND ITS ALLOCATION OF A TROP ICAL W ET SEASONAL RA IN FOREST IN X ISHUANGBANNA Feng Zhili, Zheng Zheng, Zhang J ianhou, Cao M in, Sha L iqing and D eng J iw u (T he X ishuang banna T rop ical B otanical Gard en, CA S,M eng la, Y unnan666303) AbstractT he biom ass and its allocation of a trop ical w et seasonal rain fo rest in X ishuang2 banna w ere studied based on the standard tree regression analysis (fo r trees and lianas) and clear cut m ethod (fo r shrub and herb). T he to tal biom ass of the comm unity w as 360. 909t hm - 2, and its allocation in different layers w as: tree layer 3521563t hm - 2 ( account fo r 97169% ), shrub layer 41737thm - 2 (1131% ), liana 3. 108thm - 2 (0186% ) and herb layer 01501thm - 2 (0114% ). M o st of the biom ass of the comm unity concentrated on the tree lay2 er, the o rganic allocation of the biom ass in tree layer w as: stem 241127thm - 2 (68143% ), roo t 691614thm - 2 (19175% ), branch 37. 287 (10157% ) t hm - 2, and leaves 41392t hm - 2 (1. 25% ) ; T he DBH class allocation of the biom ass m ainly concentrated on the m iddle DBH class, α 1997206209, 1998202212 (CERN ) Ξ: 50,, 650223
482 22 the biom ass of six DBH classes from 20cm to 80cm reached 2551460thm - 2 (72146% ) ; T he vertical allocation of the biom ass in tree layer w as: the sub2layer g 2191365t hm - 2 (62122% ), the sub2layer g 1071743thm - 2 (30156% ), and the sublayer g 251455thm - 2 (7122% ) ; T here are tw enty2six species w ith biom ass over 015% of the to tal biom ass of the tree layer, and three species w ith biom ass over 5%, i.. e., P om etia tom entosa (account fo r 19167% ), B arring tonia m acrostachy a ( 5144% ) and T erm inalia my riocarp a ( 5127% ). T he species biom ass allocation show ed that the comm unity had distinct dom inant species. T he LA I of the tree layer w as 5. 724. Key wordst rop ical seasonal rain fo rest,b iom ass, X ishuangbanna,, (B row n et a l., 1991; K ira et a l., 1967; K ira & Sh ide, 1967; R ai et a l., 1986), (, 1988;, 1992;, 1991),,, 1, 1hm 2, 21 50 N, 101 12 E, 750m, 1557mm,, (11 4 ) 264mm, 17%, (5 10 ) 1293mm, 83%, 86% 1161724kcalcm 2 a - 1, 178718h 2115, (5 ) 2513, (1 ) 1515, 22 ( P om etia tom en tosa ), (B a rring ton ia m acrostachy a) (G ironn iera subaequa lis) (Ch isocheton siam ensis) (A rd isia tenera)(m ez z ettiop sis creag h ii)(d ichap eta lum g elon ioid es) 145, 5cm 730 hm - 2, 31. 280m 2 hm - 2, (Cao et a l., 1996) 2 211 1hm 2 5cm, 730 hm - 2, 28, 10cm, 21,,, (, 1982;, 1993;, 1992), 105,
6 : 483,,,, (, 1993),,,, (5150cm ), (5cm D 20cm ) (20cm < D 150cm ), (D 2 H ), 1hm 2,, (, 1993) 212, 212cm 12,, (D 2 L ), 213() 5m 5m 10,, 1hm 2 3 311 W = a (D 2 H ) b (W ) (D ) (H ), (, 1993;, 1992;, 1991;, 1976;, 1986; K ira et a l., 1967) 1, (P < 0. 001) (P < 0. 01) L ayers T ree 1 Table 1The regression models of the tree and liana biom ass of the trop ical w et seasonal rain fo rest DBH classes 5cm D 20cm 20cm < D 150cm O rgans Regression models Stem s W s= 0. 0296 (D 2 H ) 0. 9539 0. 9861 3 3 3 B ranches W b= 0. 0158 (D 2 H ) 0. 8285 0. 8430 3 3 3 L eaves W l= 0. 0488 (D 2 H ) 0. 5027 0. 6596 3 3 Roo ts W r= 0. 0112 (D 2 H ) 0. 9045 0. 9535 3 3 3 To tal W t= 0. 0675 (D 2 H ) 0. 9040 0. 9790 3 3 3 Stem s W s= 0. 0606 (D 2 H ) 0. 8976 0. 9797 3 3 3 B ranches W b= 0. 5962 (D 2 H ) 0. 5226 0. 8661 3 3 3 L eaves W l= 0. 1707 (D 2 H ) 0. 4280 0. 8336 3 3 Roo ts W r= 0. 0069 (D 2 H ) 0. 9781 0. 9555 3 3 3 To tal W t= 0. 1341 (D 2 H ) 0. 8599 0. 9758 3 3 3 L iana 2cm < D 1318cm A ll W t= 0. 0740 (D 2 H ) 0. 8495 0. 9756 3 3 3 3 3 P < 0. 01 3 3 3 P < 0. 001 Co rrelation coefficients r
484 22 312 360. 909thm - 2,, 352. 563t hm - 2, 97. 69%, 4. 737 3. 108 0. 501t hm - 2, 1131% 0186% 0114% (2),, 2 Table 2The biom ass of the trop ical w et seasonal rain fo rset (thm - 2 ) L ayers T ree O rgans B iom ass Percentage of to tal biom ass(% ) Stem s 241. 270 66. 85 B ranches 37. 287 10. 33 L eaves 4. 392 1. 22 Roo ts 69. 614 19. 29 To tal 352. 563 97. 69 Sh rubs 4. 737 1. 31 H erbs 0. 501 0. 14 L iana 3. 108 0. 86 To tal 360. 909 100. 00 313 31311 2, : 2411270thm - 2 ( 68143% ) 691614 t hm - 2 ( 19175% ) 371287t hm - 2 ( 10157% ) 41392thm - 2 (1125% ),, 80%,, 60%,, 20, 65%, (71thm - 2 ), (33thm - 2 ) (Go lley, 1975) (20140% ) (20% ) (Go lley, 1975;M ajo r, 1974) 2821949thm - 2, (223 22thm - 2 ) (B row n et a l., 1991), (420thm - 2 ) (R ai & P rocto r, 1986) (278. 557thm - 2 ) (269thm - 2 ) (W et2dry fo rest) (252thm - 2 ) (261thm - 2 ), (360thm - 2 ) (Go lley, 1975) (3. 8thm - 2 ), (5113t hm - 2 ) (, 1991)51724 31312 3, 5cm < 30cm 3,
6 : 485 4. 930thm - 2 42. 230thm - 2, 30cm < 60cm 3, 60cm < 70cm, 52. 270thm - 2, 80cm 5cm < 20cm, 7142% 80cm < 150cm, 20. 12%, 20cm < 80cm 72146%,, (, 1993) (, 1992) DBH C lasses (cm ) 3 Table 3The allocation of the biom ass among the different diam eter classes N o. of individual (nhm 2 ) fo r tree layer of the trop ical w et seasonal rain fo rest (thm - 2 ) Stem s B iom ass (thm - 2 ) B ranches L eaves Roo ts To tal Percentage of tree biom ass (% ) 5< 10 359 21930 01761 01402 01837 41930 1140 59143% 15144% 8115% 16198% 100% 10< 20 182 121914 31400 01784 41179 211241 6102 60184% 16101% 3152% 19167% 100% 20< 30 89 261908 71869 01923 61530 421230 11198 63172% 16127% 2119% 17183% 100% 30< 40 41 271452 51757 01618 71151 401978 11162 66199% 14105% 1151% 17145% 100% 40< 50 20 261040 41139 01414 71197 371790 10172 68191% 10195% 1110% 19104% 100% 50< 60 13 261598 31506 01335 71651 381090 10180 69183% 9120% 0188% 20109% 100% 60< 70 12 361817 41099 01375 101979 521270 14183 70144% 7184% 0172% 21100% 100% 70< 80 8 311181 31141 01280 91500 441102 12151 70170% 7112% 0164% 21154% 100% 80< 90 2 101739 01947 01082 31367 151135 4129 70195% 6126% 0154% 22125% 100% 90< 100 1 51930 01501 01043 11876 81350 2137 71120% 6100% 0151% 22147% 100% 100< 110 1 81836 01632 01051 21897 121416 3152 71117% 5109% 0141% 23133% 100% 110< 120 1 91609 01664 01054 31174 131501 3183 71117% 4192% 0140% 23151% 100% 140< 150 1 151316 01871 01067 51276 211530 6111 71114% 4105% 0131% 24151% 100% To tal 730 2411270 371287 41392 691614 3521563 100 68. 43% 10. 57% 1. 25% 19. 75% 100%,, 90cm, 5cm < 10cm 90cm < 100cm, 59143% 71120%, 90cm < 100cm
486 22 140cm < 150cm, 3,, 5cm < 10cm 15144% 20cm < 30cm 16127% 20cm < 30cm,, 30cm < 40cm 14105% 140cm < 150cm 4105%, 5cm < 10cm 8115% 140cm < 150cm 0131%3, 30cm < 40cm,, 30cm < 40cm 17145% 140cm < 150cm 24151%,,, 31313 3 (Cao et a l., 1996)g, > 30m, (P om etia tom en tosa) (Ga rug a f loribund a) (G ironn iera sub2 aequa lis)(e laeoca rp us va runua) (S em eca rp us reticu la ta)(t er2 m ina lia m y rioca rp a),,, 30% g, 15m < 30m, (B a rring ton ia m acrostachy a) (Ch isocheton siam ensis)(c leid ion brev ip etiola tum )(L ithoca rp us leu2 costachy us)(m ez z ettiop sis creag h ii)(litsea rang i)(e 2 laeoca rp us va runua) (P terosp erm um lanceaef olium ),,, g, 15m,, (M illettia lap tobotry a ) (S y z ig ium obla tum ) (Ga rcin ia cow a )( P it2 tosp orop sis kerrii) (Gon iotha lam us g rif f ith ii),, 4 Table 4A llocation of the tree biom ass among the sub2layers of the trop ical w et seasonal rain fo rest (% ) T ree sub2layers (m ) g g g % % of to tal no. of individuals Stem s B ranches L eaves Roo ts To tal 2< 5 9. 59 0. 13 0. 04 0. 02 0. 04 0. 23 5< 10 43. 92 1. 13 0. 27 0. 12 0. 31 1. 83 10< 15 18. 74 3. 22 0. 99 0. 17 0. 78 5. 16 To tal 72. 25 4. 48 1. 30 0. 31 1. 13 7. 22 15< 20 8. 01 4. 25 1. 29 0. 16 1. 05 6. 75 20< 25 7. 01 6. 00 1. 50 0. 17 1. 53 9. 20 25< 30 6. 01 9. 88 1. 91 0. 19 2. 63 14. 61 To tal 21. 03 20. 13 4. 70 0. 52 5. 21 30. 56 30< 35 2. 86 11. 51 1. 52 0. 15 3. 33 16. 51 35< 40 2. 57 16. 86 1. 80 0. 16 5. 11 23. 93 > 40 1. 29 15. 45 1. 25 0. 11 4. 97 21. 78 To tal 6. 72 43. 82 4. 57 0. 42 13. 41 62. 22 352. 563thm - 2, 4,
6 : 487, g (25. 455thm - 2 ), 7122% ; g (1071743thm - 2 ), 30156% ; g ( 219. 365t hm - 2 ), 62. 22%, g (72125% ), g (21103% ), g (6172% ),, g, g 31314 526 3 Table 5The biom ass allocation fo r the m ain tw enty2six species in the trop ical w et seasonal rain fo rest B iom ass Individuals % % Species thm - 2 % of tree N o. ghm - 2 % of tree layer layer (% ) 1. P om etia tom en tosa 69. 349 19. 67 37 5. 07 2. B a rring ton ia m acrostachy a 19. 179 5. 44 55 7. 53 3. T erm ina lia my rioca rp a 18. 580 5. 27 1 0. 14 41 Chuk rasia tabu la ris 11. 881 3. 37 1 0. 14 51 S loanea cheliensis 9. 872 2. 80 10 1. 37 61 G ironn iera subaequa lis 9. 837 2. 79 43 5. 89 71 Ga rug a f loribund a 9. 413 2. 67 8 1. 10 81 E laeocarp us va runua 8. 497 2. 41 5 0. 68 91 D ryp etes y unnanensis 8. 426 2. 39 7 0. 96 101 S ap ium bacca tum 7. 510 2. 13 1 0. 14 111 P ou teria g rand if olia 6. 593 1. 87 9 1. 23 121 P terosp erm um m eng lunense 6. 452 1. 83 1 0. 14 131 T erm ina lia bellirica 5. 782 1. 64 3 0. 41 141 L ithoca rp us leucostachy us 5. 641 1. 60 10 1. 37 151 F irm iana colora ta 5. 465 1. 55 2 0. 27 161 S em eca rp us reticu la ta 5. 288 1. 50 6 0. 82 171 P hoebe p uw enensis 4. 195 1. 19 7 0. 96 181 T rem a orien ta lis 3. 808 1. 08 1 0. 14 191 Ch isocheton siam ensis 3. 490 0. 99 31 4. 25 201 C leid ion brev ip etiola tum 3. 385 0. 96 12 1. 64 211 P a ram ichelia ba illon ii 3. 279 0. 93 1 0. 14 221 H oven ia acerba 3. 208 0. 91 1 0. 14 231 M itrep hora ca lca rea 3. 032 0. 86 7 0. 96 241 M ez z ettiop sis creag h ii 2. 644 0. 75 22 3. 01 251 H om a lium laoticum 2. 609 0. 74 1 0. 14 261 P terosp erm um lanceaef olium 1. 763 0. 50 5 0. 68 To tal 239. 178 67. 84 287 39. 32 O ther species 113. 385 32. 16 443 60. 68 5 015% 26,, 691349thm - 2 (19167% ),
488 22,, 55 hm - 2, 191179t hm - 2 (5144% ) (Chuk rasia tabu la ris),, 26 2391178thm - 2, 67184%, 287, 39132% 82107% 119 1131385thm - 2 (32116% ),, 1982:,, 6 (4) 257 267, 1988:,, 6 (4) 2632, 1992:,, 16 (4) 293 300, 1993:,, 17 (4) 289298, 1992:,, 14 (2) 95107, 1991:,, 15 (3) 197206 (), 1976:, :, 5875 (), 1986:, :, 2147 Go lley, F. B. (), 1975:,, :, 124134. M ajo r J. (Knapp, R. ) () 1986:,, :, 156157. B row n S., Gilesp ie A. J. R. & L ugo A. E., 1991: B iom ass of trop ical fo rests of south and southeast A sia, Canad ian J ou rnal of F orest R esearch, 21 (1) 111117. Cao M., Zhang J., Feng Z. et a l., 1996: T ree species compo sition of a seasonal rain fo rest in X ishuangbanna, South2 w est Ch ina, T rop ica l E cology, 37 (2) 183192. Kira T. & Sh idei T., 1967: P rim ary p roduction and turnover of o rganic m atter in different fo rest eco system s of the w estern Pacific. J ap. J. of E col., 17 (2) 7087. Kira T. O gaw a H., Yoda K. et a l., 1967: Comparative eco logical studies on th ree m ain types of fo rest vegetation in T hailand, IV, D ry m atter p roduction, w ith special reference to Khao Chong rain fo rest, N atu re & L if e in S E A sia, (5) 148174. Rai, S. N. & P rocto r J., 1986: Eco logical studies on four rainfo rests in Karnataka, India, 1. Environm ent, structure, flo ristics and biom asṡ J. of E col., 74 (2) 439454.