生态环境学报
生態環境學報
생태배경학보
ECOLOGY AND ENVIRONMENT
2014年
9期
1520-1525
,共6页
童琳%唐旭利%张静%张倩媚
童琳%唐旭利%張靜%張倩媚
동림%당욱리%장정%장천미
菌根%群落%侵染率%生物量%胸径%根系碳储量
菌根%群落%侵染率%生物量%胸徑%根繫碳儲量
균근%군락%침염솔%생물량%흉경%근계탄저량
mycorrhiza%community%infection rate%biomass%diameter at breast height%root carbon storage ratio
为了从生态系统尺度探讨菌根资源与植物生物量累积的关系，调查了鼎湖山不同成熟度的三个森林群落主要优势树种的菌根侵染情况。综合分析各森林群落优势树种的个体数、生物量和菌根侵染率发现：1）菌根侵染率与径向生长速率相关，植物生长迅速的阶段菌根侵染率更高。中径级（胸径15~30 cm）的马尾松（Pinus massoniana）和锥（Castanopsis chinensis）的侵染率比小径级（胸径1~15 cm）个体的侵染率高，而大径级个体（胸径30 cm以上）的侵染率略低于中径级个体的侵染率。木荷（Schima superba）则表现出侵染率随着胸径增大而增高的趋势。2）树种在群落内的侵染率越高，其对群落生物量的贡献率越大。如马尾松在马尾松林和混交林的侵染率分别为(77.30±18.02)%和(40.50±14.42)%，其对马尾松林群落生物量的贡献率达到87.43%，是对混交林生物量贡献率（17.51%）的5倍。混交林和阔叶林的共有优势树种锥的侵染率和生物量贡献率也有存在相同规律。3）根系碳储量占群落总碳储量比例较高的群落其优势树种平均侵染率相对较高。马尾松林、混交林和季风常绿阔叶林中，根系碳储量占群落总碳储量的比例分别为55%、54%、42%，群落优势树种平均侵染率分别为(66.73±10.55)%、(46.97±27.28)%、(54.22±25.45)%，马尾松林的根系碳储量和平均侵染率均高于混交林和季风常绿阔叶林。以上结果表明，菌根真菌侵染对于植物个体生长速率以及群落水平的生物量累积具有一定的促进作用。
為瞭從生態繫統呎度探討菌根資源與植物生物量纍積的關繫，調查瞭鼎湖山不同成熟度的三箇森林群落主要優勢樹種的菌根侵染情況。綜閤分析各森林群落優勢樹種的箇體數、生物量和菌根侵染率髮現：1）菌根侵染率與徑嚮生長速率相關，植物生長迅速的階段菌根侵染率更高。中徑級（胸徑15~30 cm）的馬尾鬆（Pinus massoniana）和錐（Castanopsis chinensis）的侵染率比小徑級（胸徑1~15 cm）箇體的侵染率高，而大徑級箇體（胸徑30 cm以上）的侵染率略低于中徑級箇體的侵染率。木荷（Schima superba）則錶現齣侵染率隨著胸徑增大而增高的趨勢。2）樹種在群落內的侵染率越高，其對群落生物量的貢獻率越大。如馬尾鬆在馬尾鬆林和混交林的侵染率分彆為(77.30±18.02)%和(40.50±14.42)%，其對馬尾鬆林群落生物量的貢獻率達到87.43%，是對混交林生物量貢獻率（17.51%）的5倍。混交林和闊葉林的共有優勢樹種錐的侵染率和生物量貢獻率也有存在相同規律。3）根繫碳儲量佔群落總碳儲量比例較高的群落其優勢樹種平均侵染率相對較高。馬尾鬆林、混交林和季風常綠闊葉林中，根繫碳儲量佔群落總碳儲量的比例分彆為55%、54%、42%，群落優勢樹種平均侵染率分彆為(66.73±10.55)%、(46.97±27.28)%、(54.22±25.45)%，馬尾鬆林的根繫碳儲量和平均侵染率均高于混交林和季風常綠闊葉林。以上結果錶明，菌根真菌侵染對于植物箇體生長速率以及群落水平的生物量纍積具有一定的促進作用。
위료종생태계통척도탐토균근자원여식물생물량루적적관계，조사료정호산불동성숙도적삼개삼림군락주요우세수충적균근침염정황。종합분석각삼림군락우세수충적개체수、생물량화균근침염솔발현：1）균근침염솔여경향생장속솔상관，식물생장신속적계단균근침염솔경고。중경급（흉경15~30 cm）적마미송（Pinus massoniana）화추（Castanopsis chinensis）적침염솔비소경급（흉경1~15 cm）개체적침염솔고，이대경급개체（흉경30 cm이상）적침염솔략저우중경급개체적침염솔。목하（Schima superba）칙표현출침염솔수착흉경증대이증고적추세。2）수충재군락내적침염솔월고，기대군락생물량적공헌솔월대。여마미송재마미송림화혼교림적침염솔분별위(77.30±18.02)%화(40.50±14.42)%，기대마미송림군락생물량적공헌솔체도87.43%，시대혼교림생물량공헌솔（17.51%）적5배。혼교림화활협림적공유우세수충추적침염솔화생물량공헌솔야유존재상동규률。3）근계탄저량점군락총탄저량비례교고적군락기우세수충평균침염솔상대교고。마미송림、혼교림화계풍상록활협림중，근계탄저량점군락총탄저량적비례분별위55%、54%、42%，군락우세수충평균침염솔분별위(66.73±10.55)%、(46.97±27.28)%、(54.22±25.45)%，마미송림적근계탄저량화평균침염솔균고우혼교림화계풍상록활협림。이상결과표명，균근진균침염대우식물개체생장속솔이급군낙수평적생물량루적구유일정적촉진작용。
To reveal the relations between mycorrhizal resources and biomass accumulation at system scale, we analysed possible impact of mycorrhizal colonization on growth rate and biomass accumulation of dominant tree species in three forests at Dinghushan Nature Reserve. Mycorrhizal infection rate, quantity percentages and biomass of doiminant tree species in a given ecosystem were investigated in this study. Our research shows that: 1) Infection rate changed accordingly with growth rate. Trees that grow more rapidly might have higher infection rate. 2) Plant with higher infection rate turned to have lager biomass ratio in its community. e.g., infection rate of Pinus massoniana were (77.30±18.02)% and (40.50±14.42)% in PF and MF, respectively, its biomass ratio was 87.43%in PF, which was five times of that (17.51%) in MF. This tendency was the same for Castanopsis chinensis, a codominant species in MF and BF. 3) Infection rate and root carbon content were relatively higher in PF (pine forest, early successional stage) than that in MF (mixed coniferous and broadleaved forest, middle successional stage) and BF (monsoon evergreen broadleaved forest, late successional stage). In PF, MF and BF, root carbon storage ratio was 55%, 54%and 42%, mycorrhizal infection rate was (66.73±10.55)%, (46.97±27.28)% and (54.22±25.45)%, respectively. This study thus suggests that mycorrhizal colonization may promote plant growth and biomass accumulation of forest community.
