Two Casuarina species, C. equisetifolia and C. junghniana, were subjected to aseries of studies which aimed to improve the planing and use of these species in China.The studies encompassed phenology, propagation, genetic variation, disease resistance,nutrition, and symbiotic relationship with microofganisms. Data were collected from 27experiments on species, provenance and progeny trials, clonal tests and glasshouseexperiments in China over the past 10 ten years. In addition, growth data from eightinternational provenance trials of C. equisetghlta provided by Mr KHongsakPinyopusperk (the second supervisor of this thesis and leader of the IPTC proect) wereincluded in the studies on provenance variation. The overall results are sununarizedbelow:1. Phenology and propagaion of C. equisetifolia and C. junghuhnboa in southernChinaTrees startd flowering about 2-3 years ther planting. Provenanes varied in theage of first flowering and theting with those from Southeast Asia found to startflowering and fruiting earlier than those from other countries.The two species can bepropagated by seed and vegetathe propagation. Viability of seeds can be maintalnedby storing the seeds at 4℃ temperatur for both species. Successful vegetativepropagaion methods include cutting, grafting and tissus culture. Water culture is oneof the most effective methds for cutting propagation of the two species. C.equisetghlia can be propagated successfully by tissue culture, which is also aneffective method to preserve better genetic resources from plantations andintroduction trials in southern China. Grafting yielded less than 30% for both speciessuggesting that more research is needed for this method.2. Results of species/provenance trials in HainanBased on survival, growth, tree form and twon resistance, the order of the bestto the worst species was C. junghuhniana C. cunninghamiana, C. equisetifolia, C.glauca, Allocasuarina littoralis, A. torulosa and C. cristata. The tree voliume of C.junguhnbiana was 80 times greater tban that of C. cristata. There wer 2-8 times inthe difference in tree volume betwen C cunninghamiana, C. equisetifolia and C.gleuca provenans. ä¸å›½æž—业科å¦ç ”究院åšå£«å¦ä½è®ºæ–‡3.Quanitati,raits,ree heights,DBH nd vol。es of C equlsetifOlia and C å…«å©å’–励n0na,re all屯dfie出扛ly dilibrellt bewå±en silos andpå®yen。es.here were evlden of provenance x site(G x E) interachons.Some qualhatlye rits,tem and bï¼h fealllres,Of 43 ptovenances of C equisetghlla wer also signficanly differelltbCtW6CtW6en sit6it6a provenances or P x S inæŸf8C'ï¼xonsï¼Žåˆ€å± Inieration effeCts ndicated site effect m he selection of suitable provnances nd tha It Is necessny to 5ave srparatbæ—¢4uæ—§m则aions oï¼c equ心epe.4.Based on ree heigh,DBH,silrvlval percemp,tem。is persistene nd sl:elll ådå’–å’–é“ n wo ntemantemaå’– ptOVOllBllCO ials O5C OqOçœºä¼½åŠ O Sä»°å’–M China,he good Penonlling PoVellallCes were:seedlot 8086 (Ha inh,Vietnam, 18if8 einï¼Puram,ii勾,18355(Cotonou, Benn,18013 peï¼Kulaug, Må18244 på’–,8åˆ åç¿åˆš,18119阳esï¼,b峋,18288 (Mambartota,Sri M,18348 (KUanta Pehang,Malasiya,18015 (Chandipur$alasore,ndi刃 andl 8008 paha Casuanna Beach,Northern Tetritory, Astralial in he E946 tial at DOllgshan,Fulianï¼›nd seedlot 8154 pan,Pmp Is, PHI,18355(Cotonou,Bentå 18128won Nuoc,Vieinaln,18143(Gede,Kellya), 18153 ila Beach,På©ua New Oun勾,18127(hach Lien,Vi一,18134 (Kenyatt,Beach Kenya),14233 (R.ï¼ï¼tyï¼ï¼n,hailand and 18288 (Madagama Sri Lankal in the E944 ial at Yrpi,o凹å©å±±å©ï¼Žhese provenances wer better hn thebest local land races Mmå¹»mè¡€emcå€é˜³ï¼Žåˆ€è„ scåœä»¥edprovenances were 25.0ï¼… nd 20.93ï¼…of the total ptovenanes,respectively n he wo ials,eqti切dM to SdSCdOO WOllSæ²I"1.2耳2 Sdï¼1.343ï¼Žç ŒMpo VCll8llCVS,18355alld 1828å•, were al...
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