The Study Of Biomass And Productivity Of Artificial Compound Community Of Camptotheca Acuminate, Taxus Walichiana Var. Maimnei And Catharanthus Roseus (L.)G. Don

Taxus walichiana var.Maimnei(T.) is a Grade One of national key protective plant which isprecious and severe on the World. Camptotheca acuminata (C.) is Grade Two of nationalprotective plant. This study takes these two plants as objective species and manually collocates theupright structure of aboveground and underground of C.,T. and Catharanthus roseus (L.) G.Don,establishes compound communities.Photosynthesis character, secondary metabolism and therelation with environmental factors, biomass character, the utilization in three-dimensional space ofcommunity, setting of life cycle forms are all investigated,the result of this research is:1.The study of distribution is studied.we mainly anaylse fractal character.The D_b of artificialcompound community, simple area of Camptotheca acuminate, Taxus walichiana var. maimnei andCatharanthus roseus (L.)G. Don are 1.6064,0.6636,1.4051,1.7216. Artificial compoundcommunity, it is bigger then Camptotheca acuminate and Taxus walichiana var. maimnei singlespecies planting.2.The crown breadth,leaf areaindex,plant height crown length and breadth,extinction coefficientare studied,the result is artificial compound community can use more horizontal direction spacevertical orientation space.3. For growth and development disciplinarian, on fiat and sloping field,the plant height ofartificial compound community are all higher than purebred planting,and fiat is better than slopingfield.At flat, base diameter of single species planting of Camptotheca acuminate and Catharanthusroseus (L.)G. Don is bigger than artificial compound community, Taxus walichiana var. maimnei isadverse.At sloping field, diameter of single species planting of Camptotheca acuminate is biggerthan artificial compound community, Taxus walichiana var. maimnei is adverse, growth rate of singlcspecies planting of Catharanthus roseus (L.)G. Don is bigger than artificial compoundcommunity, compare the flat and sloping field, Camptotheca acuminate have minor difference, Taxuswalichiana var. maimnei of flat is bigger than sloping field,after June,the Catharanthus roseus (L.)G.Don of sloping field is bigger than flat.4.For Photosynthetic Ecophysiology, the Camptotheca acuminate and Taxus walichiana var.maimnei of artificial compound communityall have higher using ability of light, Catharanthusroseus (L.)G. Don is opposite.For Photosynthetic Ecophysiology of Camptotheca acuminate of artificial compoundcommunity, flat is bigger sloping field;For Taxus walichiana var. maimnei, fiat is closer to slopingfield,for Catharanthus roseus (L.)G. Don, sloping field is bigger flat.5.In the study of the relation to the change of growth and development in different season and meteorological phenomena factor in Camptotheca acuminata, Taxus walichiana var.maimnei, Catharanthus roseus (L.)G. Don. artificial compound community, we can conclude thathigh soil moisture and rainfall is better for height increase and net radiation is better for the stemdevelopment of Camptotheca acuminata,high rainfall and soil temperature is better for heightincrease and high air temperature and net radiation is better for stem development of Taxuswalichiana var. maimnei;High soil temperature is better for height increase and high soil moisture isbetter for stem development of Catharanthus roseus (L.)G. Don,high air temperature and airmoisture is bad for height increase and stem development odf Catharanthus roseus (L.)G. Don.6.For biomass allocate,flat artificial compound community is better for the laminae biomassgrowth of Camptotheca acuminate,better for root biomass growth of Taxus walichiana var.maimnei,better for stem and gains biomass growth of Catharanthus roseus (L.)G. Don. sloping fieldartificial compound community, better for stem biomass accumulate of Taxus walichiana var.maimnei, better for stem and root biomass accumulate of Catharanthus roseus (L.)G. Don.For total elemental area biomass of artificial compound community, flat is bigger than slopingfield.For productivity of artificial compound community, Camptotheca acuminate of flat is99.37%of sloping field, Taxus walichiana var. maimnei of flat is 55.72% of sloping field,Catharanthus roseus (L.)G. Don of flat is 110.44%of sloping field,flat is bigger than sloping field.7.At flat,for flat and sloping field, the Camptotheca acuminate life cycle form of artificialcompound community and single species planting are all V life cycle form,have inapparentdifference.For the Taxus walichiana var. maimnei life cycle form,at flat, artificial compound community isV_0.7521S₀C_0.2479, single species planting is V_0.8890S₀C_0.1110,clone reproduction of artificial compoundcommunityincrease.At sloping field, artificial compound community is V_0.6865S₀C_0.3135, single speciesplanting is V_0.8883S₀C_0.1117, single species planting have high vegetative growth; plat or sloping fieldall have strong vegetative growth and weak clone reproduction.For Catharanthus roseus (L.)G. Don life cycle form,at flat, artificial compound community isV_0.7249S_0.2064C_0.0687, single species planting is V_0.7865S_0.1623C_0.0512, vegetative growth is active;At slopingfield, artificial compound community is V_0.6376S_0.2875C_0.0749, single species planting isV_0.5961S_0.3374C_0.0665. artificial compound community have hige vegetative growth.For flat and sloping field artificial compound community, vegetative growth are all veryactive.For vegetative growth of Taxus walichiana var. maimnei and Catharanthus roseus (L.)G. Don,sloping field is bigger than flat,so sloping field is better for their vegetative growth;For clonereproduction of Taxus walichiana var. maimnei and Catharanthus roseus (L.)G. Don, is flat biggerthan sloping field, Camptotheca acuminate is adverse; sexual reproduction of Catharanthus roseus(L.)G. Don on flat is bigger than sloping field. In a word, sloping field is better for vegetative growthof Taxus walichiana var. maimnei and Catharanthus roseus (L.)G. Don,flat is better for Camptotheca acuminate's vegetative growth,so construct the artificial compound community of Camptothecaacuminate,Taxus walichiana var. maimnei and Catharanthus roseus (L.)G. Don at reaearch place isfeasible.