huahui,youqishixianqiehua,caihouweilebaochizuihaodepinzhi,yanhuanshuailao,dikangwaijiehuanjingdebianhua,changchangcaiyonghuahuibaoxianjiyuyichuli。huahuibaoxianjibaokuoyibanbaoxianye、水合液、脈衝液、STS脈衝液、花蕾開放液和瓶插保持液等。在采後處理的各個環節,從栽培到批發、零售、消費、都可以使用花卉保鮮劑。許多切花經保鮮處理後,可延長花卉壽命2倍。花卉保鮮劑能使花朵增大,保持葉片和花瓣的色澤,從而提高花卉品質。
大部分商業性保鮮劑都含有碳水化合物、殺菌劑、乙烯抑製劑、生長調節劑和礦物質營養成分,下麵分別詳述它們的作用。
碳水化合物:是shi切qie花hua的de主zhu要yao營ying養yang源yuan和he能neng量liang來lai源yuan,它ta能neng維wei持chi離li開kai母mu體ti後hou的de切qie花hua所suo有you生sheng理li和he生sheng化hua過guo程cheng。外wai供gong糖tang源yuan,將jiang參can與yu延yan長chang瓶ping插cha壽shou命ming,起qi著zhe維wei持chi切qie花hua細xi胞bao中zhong線xian粒li體ti結jie構gou和he功gong能neng的de作zuo用yong。通tong過guo調tiao節jie蒸zheng騰teng作zuo用yong和he細xi胞bao滲shen透tou促cu進jin水shui分fen平ping衡heng,增zeng加jia水shui分fen吸xi收shou。蔗zhe糖tang是shi保bao鮮xian劑ji中zhong使shi用yong最zui廣guang泛fan的de碳tan水shui化hua合he物wu之zhi一yi,果guo糖tang和he葡pu萄tao糖tang有you時shi也ye采cai用yong。不bu同tong的de切qie花hua種zhong類lei或huo同tong一yi種zhong類lei不bu同tong品pin種zhong最zui適shi宜yi保bao鮮xian劑ji中zhong糖tang的de濃nong度du不bu同tong,如ru在zai花hua蕾lei開kai放fang液ye中zhong,石shi竹zhu最zui適shi濃nong度du為wei10%,而菊花葉片對糖敏感,一般用2%,月季高於1.5%易yi引yin起qi葉ye片pian燒shao傷shang。最zui適shi糖tang濃nong度du還hai與yu處chu理li方fang法fa和he時shi間jian長chang短duan有you關guan,一yi般ban來lai說shuo,對dui一yi特te定ding切qie花hua,保bao鮮xian劑ji處chu理li時shi間jian越yue長chang,所suo需xu糖tang的de濃nong度du越yue低di,因yin此ci脈mai衝chong液ye(采後較短時間處理)中的糖濃度高,花蕾開放液濃度中等,而瓶插保持液糖濃度較低。
殺菌劑:在花瓶中生長的微生物種類有細菌、酵(jiao)母(mu)和(he)黴(mei)菌(jun),這(zhe)些(xie)微(wei)生(sheng)物(wu)大(da)量(liang)繁(fan)殖(zhi)後(hou),阻(zu)礙(ai)花(hua)莖(jing)導(dao)管(guan),影(ying)響(xiang)切(qie)花(hua)吸(xi)水(shui),並(bing)產(chan)生(sheng)乙(yi)烯(xi)和(he)其(qi)他(ta)有(you)毒(du)物(wu)質(zhi)而(er)加(jia)速(su)切(qie)花(hua)衰(shuai)老(lao)。為(wei)了(le)控(kong)製(zhi)微(wei)生(sheng)物(wu)生(sheng)長(chang),保(bao)鮮(xian)劑(ji)中(zhong)可(ke)以(yi)加(jia)入(ru)殺(sha)菌(jun)劑(ji)或(huo)與(yu)其(qi)他(ta)成(cheng)分(fen)混(hun)用(yong)。
乙烯抑製劑:硫代硫酸銀(STS)是shi目mu前qian花hua卉hui業ye使shi用yong最zui廣guang泛fan的de最zui佳jia乙yi烯xi抑yi製zhi劑ji,在zai植zhi物wu體ti內nei有you較jiao好hao的de移yi動dong性xing,對dui花hua朵duo內nei乙yi烯xi合he成cheng有you高gao效xiao抑yi製zhi作zuo用yong,有you效xiao地di延yan長chang多duo種zhong花hua卉hui的de瓶ping插cha壽shou命ming。STS需隨用隨配,配好液最好立即使用,如不馬上使用應避光保存,它可在20℃的黑暗環境中保存4天。
生長調節劑:生sheng長chang調tiao節jie劑ji用yong於yu花hua卉hui保bao鮮xian劑ji中zhong,它ta們men包bao括kuo人ren工gong合he成cheng的de生sheng長chang素su與yu植zhi物wu內nei源yuan激ji素su。植zhi物wu生sheng長chang調tiao節jie劑ji可ke單dan獨du使shi用yong或huo與yu其qi他ta成cheng分fen混hun合he用yong。它ta可ke以yi引yin起qi或huo抑yi製zhi植zhi物wu體ti內nei各ge種zhong生sheng理li和he生sheng化hua進jin程cheng,從cong而er延yan緩huan切qie花hua的de衰shuai老lao過guo程cheng。其qi中zhong,細xi胞bao分fen裂lie素su是shi最zui常chang用yong的de,它ta主zhu要yao能neng抑yi製zhi乙yi烯xi產chan生sheng,應ying用yong時shi可ke噴pen布bu或huo浸jin蘸zhan,最zui適shi濃nong度du為wei10000ppm,浸蘸2分鍾即可,如時間過長,也會產生不良後果,香石竹對此處理效果最佳。
以(yi)上(shang)所(suo)述(shu)是(shi)花(hua)卉(hui)保(bao)鮮(xian)劑(ji)成(cheng)分(fen),而(er)在(zai)實(shi)際(ji)生(sheng)產(chan)中(zhong)花(hua)卉(hui)保(bao)鮮(xian)主(zhu)要(yao)成(cheng)分(fen)是(shi)糖(tang)和(he)殺(sha)菌(jun)劑(ji),有(you)時(shi)再(zai)增(zeng)加(jia)其(qi)它(ta)成(cheng)分(fen)。由(you)於(yu)一(yi)些(xie)切(qie)花(hua)從(cong)莖(jing)端(duan)和(he)淹(yan)在(zai)水(shui)中(zhong)的(de)葉(ye)片(pian)分(fen)泌(mi)出(chu)有(you)害(hai)物(wu)質(zhi),會(hui)傷(shang)害(hai)它(ta)們(men)自(zi)身(shen)和(he)同(tong)一(yi)瓶(ping)中(zhong)的(de)其(qi)它(ta)花(hua)卉(hui),因(yin)此(ci)每(mei)隔(ge)一(yi)段(duan)時(shi)間(jian),應(ying)給(gei)花(hua)瓶(ping)調(tiao)換(huan)新(xin)鮮(xian)的(de)保(bao)鮮(xian)液(ye)。
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