STUD IES ON THE B IOM ASS OF TY P ICAL SHRUBLAND AND THE IR REGENERAT ION CAPAC ITY AFTER CUTT ING

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1 1997, 21 (6) A cta Phytoecolog ica S in ica α (, ) (, ), tg hm - 2, (30 ) 10% 25% 4 90% 2, 5 84%,,, % 6210%, STUD IES ON THE B IOM ASS OF TY P ICAL SHRUBLAND AND THE IR REGENERAT ION CAPAC ITY AFTER CUTT ING H e J insheng and W ang Q ibing (Institu te of B otany, Ch inese A cad emy of S ciences, B eij ing ) H u Dong (D ep artm ent of B iology, Cap ital N orm al U niversity, B eij ing ) Abstract Sh rubland is the typ ical degraded eco system s in the T h ree Go rges R egion. In th is paper, the biom asses of 4 types of sh rublands, such as M y rsine af ricana, L orop etalum ch i2 nense, V itex neg und o and Cotinus cog gy g ria, and their responses to cutting w ere investigated w ith harvest m ethod and cutting experim ent. T he results show that the biom ass of these 4 types of sh rublands w ere , , and tghm - 2, respective2 ly, being equal to about 10% 25% of that of the typ ical natural evergreen broadleaved fo rests (30 years). T he sh rub layer accounted fo r 90% of the comm unity in term s of the to tal o r the underground o r the aboveground biom ass. In the biom ass species sequence, the top 5 species amounted to over 84% of the to tal biom ass. T he sh rublands of the sam e type w ere α , KS852107,,,

2 6 : 513 sim ilar in biom ass betw een temperate and subtrop ical area. T hat Cotinus cog gy g ria sh rub and L orop eta lum ch inense sh rub recovered to 4217% and 6210% of aboveground b iom ass of the contro l due to one year resto ration after cutting, suggests their h igh grow th rate and recovery po tential. Key words T he T h ree Go rges R egion, D egraded eco system s, Sh rubland, B iom ass, Cutting,,,, (, 1995;, 1994;, 1995),, ( ), 30% (, 1994),, (W h itta2 ker, 1961; 1962; 1968; Fo rrest, 1971; Spech t, 1979),, (, 1982;, 1989;, 1989;, 1989;, 1990) 10% 30% (L ieth and W h ittaker, 1975),,, 1,, 2,, , , , d, 1 100mm, %, 7 8, (, 1994;, 1993) 2, 4,, 10 ( ) (, 1976) 2 5m 5m ( (Cotinus cog gy g ria) ) 5 2m 2m ( (M y rsine af ricana) (L orop eta lum ch inense) (V itex neg und o) ), 60 24h < 2mm 2 5mm 5 10mm > 10mm, ( ), (10m 10m ),

3 514 21,,, m 2 (4 10m 10m ), Table 1 compo sition of 4 typ ical shrubs in the Three Go rges R egion M y rsine sh rub L orop etalum sh rub V itex sh rub Cotinus sh rub B erchem ia sinica Celtis bungeana Cocculus orbiculatus Coriaris nep alensis Cotinus coggy g ria Cud rania tricusp idata G lochid ion p uberum I lex p erny i Ind igof era p seudotinctoria J asm inum nud if lorum L esp ed ez a d av id ii L. f orm osa L. v irgata L igustrum sinense L. qu ihou i L indera f rag rans L orop etalum chinense M y rsine af ricana P istacia ch inensis Py racantha f ortuneana R ham nus heterop hy lla R ham nus rosthornii R hus chinensis R osa cym osa R. laev igata S ag eretia thea V iburnum utile ( ) V itex neg und o A g rim onia p ilosa A rtem isia lactif lora A rthrax on hisp idus

4 6 : 515 ( M y rsine sh rub L orop etalum sh rub V itex sh rub Cotinus sh rub B othriochloa ischaem um B up leu rum ch inense Carex lanceolata C. sp d im orp holep is C lem atis chinensis 011 Cy nanchum p aniculatum E rem och loa op iu roid es F estuca jap onica H eterop app us altaicus H eterop ogon contortus Imp erata cy lind rica vaṙ m ajor M iscanthus sinensis P asp alum thunberg ii P oly gala jap onica P otentilla chinensis P. d iscolor S elag inella dav id ii Sm ilax m icrop hy lla Op hiop ogon jap onicus , 4,, 29 ( 14 ),, 28 ( 17 ) 15 ( 7 ),, 13 ( 8 ) 4 60% 85%, 400m > > > W h ittaker (1966), ;, (, 1989;, 1990 ; Conno lly2m ccarthy and Grigal, 1885; D ai et a l., 1985; A erts, 1989),, tghm - 2, tghm - 2, (, 1982;, 1994), 30 10% 25%,,,, 1614tg hm - 2 (, 1989) 2013tghm - 2, 1619tghm - 2

5 ( Table 2 B iom ass components of L orop etalum ch inense shrub ( nam e w ere the sam e as in Table A boveground U nderground To tal Shrub layer To tal of shrub layer H erb layer ) To tal of herb layer To tal of comm ) 3 ( Table 3 B iom ass components of M y rsine af ricana shrub ( nam e w ere the sam e as in Table A boveground U nderground To tal Shrub layer To tal of shrub layer H erb layer ) To tal of herb layer To tal of comm )

6 6 : ( Table 4 B iom ass components of V itex neg und o shrub ( nam e w ere the sam e as in Table A boveground U nderground To tal Shrub layer To tal of shrub layer H erb layer ) To tal of herb layer To tal of comm ) 5 ( Table 5 B iom ass components of Cotinus cog gy g ria shrub ( nam e w ere the sam e as in Table A boveground U nderground To tal Shrub layer To tal of shrub layer H erb layer ) To tal of herb layer To tal of comm )

7 ,, 97144% 96111% 97179%, 95128% 95115% 95139%, 91180% 91125% 92120%, 90% %, 84105%, 87180%, 98147% 1 2 4, % F ig. 1 T he species2biom ass sequence of 4 sh rubland 11 L orop etalum ch inense sh rub 21 M y rsine af ricana sh rub 31 V itex neg und o sh rub 41 Cotinus coggy g ria sh rub % 7819% 6215% 5417%, 3913%, 30%, (2411% ),, > > ; > > ; > > ,, 15 16, 11 10,,,

8 6 : 519,, 1, 4217%, 6210% 2 F ig. 2 T he dom inant species biom ass allocation of 4 typ ical sh rubland 1. Roo t, < 2mm 21 Roo t, 2 5mm 31 Roo t, 5 10mm 41 Roo t, > 10mm 51 B ranches 61 Tw igs 71 L eaves Cotinus coggy g ria shurb 2)L orop etalum chinense shrub 3)V itex negundo shrub 4)M y rsine af ricana shrub 6 1 ( kgghm - 2 ) T able 6 T he aboveground biom ass comparation betw een contro l and treatm ent of Cotinus coggy g ria shrub and L orop etalum chinense shrub after one year s cutting resto ration in cutting experim ent (B iom ass: kgghm - 2 ) Cotinus coggy g ria sh rub L orop etalum chinense sh rub Contro l T reatm ent Contro l T reatm ent Shrub layer B iom ass H erb layer B iom ass To tal ahoveground biom ass

9 520 21, (, 1995;, 1995;D ai et a l., 1990), (W h ittaker, 1966),,, %, 2178tghm - 2 ; %, 2162tg hm - 2, (, 1989; D ai et a l., 1990),, 1989:, ( ), 12 (3) , 1982:,, 6 (4) (, ), 1994:,,,, ( ), 1995:, ( 3 ),,,,, 1986:,, 10 ( 17 25, 1994:,, ( ), 1993:,,, 1990:,, 14 (3) , 1982:,, 2 (2) ( ), 1995: :, ( 4 ),,, 1989:,, 31 (4) , 1976 (, 198 :,, A erts, R., 1989: A boveground biom ass and nutrient dynam ics of Calluna V u lg aris and M olinia caeru lea in a dry heath2 land, O ikos, 56: Canell,M. G. R., 1982:W orld f orest biom ass and p rim ary p roductiv ity data,a cadem ic P ress, London,N ew Yo rk. Conno lly2m ccarthy, B. J. and Grigal, D. F., 1985: B iom ass of sh rub2dom inated w etlands in M inneso ta, F orest S cience, 31 (4) D ai, X iaobing, L ingzh i Chen and J ianhui H uang, 1990: T he resto ration of the destroyed fo rest vegetation in Yunm eng M ountain, Beijing, V eg etatio, 87 (2) Fo rrest, G, İ, 1971: Structure and p roduction of N o rth Pennire blandet bog vegetation, J. E cology, 59: L ieth, H. and R. H. W hittaker, 1975: P rim ary p roductiv ity of the biosp here, Sp ringer2v erlag, Berlin, H eideberg, N ew Yo rk. Spech t, R. L. (ed. ), 1979: H eath land s and related sh rubland s, (Eco system s of the W o rld: 9A, 9B ). E lsevier Scientific Publishing Company, Am sterdam 2O xfo rd2n ew Yo rk. W h ittaker, R. H., 1961: E stim ation of net p rim ary p roduction of fo rest and sh rub comm unities, E cology, 42: W h ittaker. R. H., 1962: N et p roduction relations of sh rubs in the Great Smoky M ountains, E cology, 43: W h ittaker, R. H., 1966: Fo rest dim ensions and p roduction in the Great Smoky M ountains, E cology, 47: W h ittaker, R. H. and W. A. N iering, 1975: V egetation of the Santa Catalina M ountains, A rizona, (V )B iom ass, P roduc2 tion, and diversity along the elevation gradienṫ E cology, 56: W h ittaker, R. H. and G. M. W oodw ell, 1968: D im ension and p roduction relations of trees and sh rubs in the B rookhaven fo rest, N ew yo rk, J. E cology, 56: 1 25.

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