Effects Of Warming And Competition On Reproduction And Root Growth Of Altermanthera Philoxeroides And Sambucus Chinesis

G lo ba l war ming has bee n a n impo rt ant issue due to t he rap id e xpa nsio n o f gr eenho use gase s e miss io n int o t he at mo spher e. The e ffe ct o f war ming o n eco s yst em has bee n a fo cus o f eco lo g ical st ud ies. B io lo gica l invas io n is a not her sig nif ic ant pr oble m t hat can’t be neg lect ed, whic h has led to wat er co nt aminat io n, agro fo r estr y d is ast ers, decline o f bio d iversit y in large area, and dest ro yed t he eco s yst em a nd eco no my fat a lly. T he lat est sur ve y sa ys no less t han 500 k ind s o f invasive p la nt s ha ve sett led do wn in China, and t he y lo se 57 bil lio n RMB ever y year. Ma ny st udies ha ve fo u nd war ming ca n pr o mot e inva sio n, so co nt ro lling inva sive p lant s e ffect ive ly in g lo ba l war ming backgr ound ha s att ract ed wide at tent io ns. Rep lac ing invas ive p lant wit h nat ive p la nt ha s bee n w ide ly used w it h t he super io r it y o f lo w co nsu mpt io n a nd enviro nme nt-fr ie nd ly. This art ic le d iscuss var iat io ns o f c lo na l repr o duct io n, se xua l r epro duct io n, and root gro wt h o f nat ive p la nt S. chinensi s and inva sive p la nt A. philoxeroides w he n war ming by u sing infrared heat er, wit h t hree cu lt ivat io n met ho ds: o ne plant per pot( no n-co mp et it ion), t wo plant s o f t he same spec ies per pot( int r aspec ific co mp et it ion), o ne p la nt fo r each spec ie s per pot( int erspec ific co mpet it io n).The resu lt s s ho w be lo w:1. War ming increased st o lo n le ngt h in A. philoxeroides in int raspec ific co mp et it io n co nd it io n by 39. 49%, and decreased rhizo me le ng t h in S. chinensis in no n-co mpet it io n co nd it io n by 56. 09%. Bot h in war ming a nd no n- war ming t reat me nt s, sto lo n bio mass in A. philoxeroides in int er spec ific co mpet it io n co nd it io n is s ig nifica nt ly lo wer t han t hat in no n- co mpet it io n co nd it io n; ho wever, r hizo me bio mas s in S. chinensis sho ws no sig nif ica nt differ e nce bet ween t he a bo ve t wo co mpet it io n co nd it io ns. War min g increased t he gap bet ween st o lo n lengt h in A. phi loxeroides a nd r hizo me le ngt h in S. chinensi s in int erspec if ic co mpet it io n co nd it io n.2. War ming decr eas ed quant it y and bio mas s o f t he inflo r e sce nc e in A. philoxeroides in int ra spec if ic co mpet it io n co nd it io n, and 1000- seed we ig ht in S. chinensi s in t hree co mp et it io n co nd it io ns. B ot h in war ming a nd no n-war min g t reat me nt s, quant it y o f inf lo re sce nce in A. phil oxeroides a nd fru it d ia met er, fr es h fru it we ig ht, and 1000-seed weig ht in S. chi nensis in int er spec ific co mp et it io n co nd it io n is sig nif ica nt ly lo wer t han t he co rr espo nd ing va lue s o f t he var ia bles in t wo species in no n- co mpet it io n co nd it io n. Sexual repr oduct io n o f t he t wo pla nt s in int erspecific co mpet it io n is lo wer t ha n t hat in no n-co mpet it io n respect ive ly. Ho we ver, A. philoxeroides dec lined mo re t han S. chinensis.3. War ming has no s ig nifica nt effect o n root growt h o f A. philoxeroi des in t hr e e co mpet it io n co nd it io ns, but incr eas e root bio ma ss and root surface in S. chinensis in int raspec if ic co mp et it io n co nd it io n, and decreas e va lues o f t he t wo var ia bles in S. chinensi s in int erspec if ic co mpet it io n condit io n. Root bio ma ss in A. phil oxeroi des and S. chinensi s in int erspecific co mp et it io n co nd it io n is lo wer t han t hat in no n-co mpet it io n co nd it io n by 54.09% and 29.55% r espect ive ly. War ming decreased t he gap o f root bio mass bet wee n A. philoxeroides and S. chinensis in int erspecific co mp et it io n co nd it io n.In a word, clo na l repr o duct io n, sexu al repro duct io n a nd ro ot gro wt h o f A. philoxeroides decrea sed s ig nif ic ant ly in int ersp e c ific co mp et it io n co mpared wit h in no n- co mpet it io n co nd it io n. It is to say, S. chinensis ha s so me co mpet it io n e ffect s o n A. philoxeroides. Ho wever, warming decr eased t he co mpet it io n e ffect s, in ot her words, war ming weakened t he co mpet it io n ad va nt age o f S. chi nensis fo r A. philoxeroides.