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1、X植物生态学报2008,32(1)88～94JournalofPlantEcology(ChineseVersion)江西千烟洲人工针叶林下狗脊蕨群落生物量1,2131,21,21,2马泽清刘琪王景徐雯佳李轩然刘迎春(1中国科学院地理科学与资源研究所,北京100101)(2中国科学院研究生院,北京100049)摘要根据野外调查和实验分析研究了江西省千烟洲人工针叶林下狗脊蕨(Woodwardiajaponica)群落的生物量、细根生物量、净初级生产力(Netprimaryproductivity,NPP)、比叶面积(Specificleafarea,SLA)
2、和叶面积指数(Leafareaindex,LAI)等。通过叶片参数和地上生物量的相关关系建立了狗脊蕨单株地上生物量估算模型,分别为W1=1.545220.61620.021H(R=0.790)和W1=2.518(DH)(R=0.894;H为株高,D为地径)。人工针叶林下灌草层地上生物-2-2-2-2量为367.8g·m(52～932g·m),凋落物为1631g·m(672～2763g·m),分别占乔木层地上生物量的4.7%-2-2(1.55%～13.2%)和20.7%(7.6%～32.1%)。狗脊蕨群落地上生物量和NPP分别为266.6g·m和88.67g
3、·m·-1-2a,其中狗脊蕨种群占73.7%;地下生物量为212.6g·m。狗脊蕨的SLA和叶干物质含量(Leavesdaymuttercon22-1tent,LDMC)分别为144.0cm·g和31.99%,二者之间呈显著负相关;最佳叶面积估算模型为S=21.9226-0.15223L+0.0009L(9.0≤L(叶片长度)≤23.5;1.4≤W(叶片宽度)≤5.9)。狗脊蕨种群的LAI为1.8。土壤含水量对狗脊蕨生物量有显著影响。群落生物量与土壤有机质和全氮含量正相关。关键词狗脊蕨生物量生物量模型叶面积模型比叶面积叶面积指数APRELIMINARYST
4、UDYONBIOMASSOFWOODWARDIAJAPONICACOMMUNI2TYUNDERACONIFEROUSPLANTATIONINSUBTROPICALCHINA1,2131,21,21,2MAZe2Qing,LIUQi2Jing,XUWen2Jia,LIXuan2Ran,andLIUYing2Chun12InstituteofGeographicScienceandNaturalResourcesResearch,ChineseAcademyofSciences,Beijing100101,China,andGraduateUniversity
5、ofChineseAcademyofSciences,Beijing100049,ChinaAbstractAimsThepurposeofthestudywastodeterminethebiomass(includingfineroots),NPP,spe2cificleafarea(SLA),leafareaindex(LAI),andsoilnutrientsofWoodwardiajaponicacommunityunderar2tificialconiferousforestinJiangxiProvinceinsubtropicalChina
6、.MethodsPlantsinquadratswereharvestedanddryweightwasmeasured.Leafareawasmeasuredbyscan2ning,andSLAwasrepresentedbytheratioofdrymattertoleafarea.LAIofthepopulationwasestimatedbySLAandleafbiomass.ImportantfindingsTherelationshipsbetweenabovegroundbiomass(W1)andgeometricparametersofW
7、.1.545220.6162japonicawereestablished(W1=0.021H(R=0.790)andW1=2.518(DH)(R=0.894),H:-2height;D:diameter).Thebiomassofherbageandshrubunderconiferousplantationwas367.8g·m(52--2-2932g·m),4.7%ofcanopylayer.Theaccumulatedlitterunderforestwas1631g·m(672-2763g·-2-2m).Theabove2andunder2gro
8、undbiomassofW.japonicacommunitywe
