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　　風(fēng)??(feng)媒??(mei)花??(hua)粉?(fen)指??(zhi)借??(jie)助??(zhu)風(fēng)??(feng)力??(li)傳??(chuan)播??(bo)授??(shou)粉??(fen)的?(de)花?(hua)粉??(fen)??，一??(yi)般??(ban)花??(hua)粉??(fen)粒??(li)小??(xiao)、質(zhì)??(zhi)輕??(qing)、量??(liang)多??(duo)??，如??(ru)柏??(bai)樹?(shu)、楊??(yang)樹?(shu)、柳??(liu)樹??(shu)、樺??(hua)樹??(shu)、梧??(wu)桐??(tong)等??(deng)；它??(ta)的??(de)特??(te)點(diǎn)??(dian)是?(shi)花??(hua)型??(xing)較??(jiao)小??(xiao)、色??(se)淺??(qian)、無??(wu)香??(xiang)味??(wei)??，數(shù)??(shu)量??(liang)多??(duo)??，花??(hua)粉??(fen)傳??(chuan)播??(bo)面??(mian)積??(ji)很??(hen)廣??(guang)、在??(zai)空??(kong)氣??(qi)中??(zhong)停??(ting)留??(liu)時(shí)?(shi)間??(jian)長(zhǎng)??(chang)??。??　　花??(hua)粉??(fen)過??(guo)敏??(min)又??(you)叫??(jiao)花??(hua)粉??(fen)癥??(zheng)、枯??(ku)草??(cao)熱??(re)??，主??(zhu)要??(yao)是??(shi)由??(you)于??(yu)對(duì)??(dui)植??(zhi)物??(wu)花??(hua)粉??(fen)存?(cun)在?(zai)過??(guo)敏??(min)現(xiàn)?(xian)象??(xiang)??，并??(bing)對(duì)??(dui)眼??(yan)、鼻?(bi)、呼??(hu)吸??(xi)道??(dao)、皮??(pi)膚??(fu)等??(deng)產(chǎn)??(chan)生??(sheng)影??(ying)響??(xiang)??。??該??(gai)類??(lei)疾?(ji)病??(bing)的??(de)過??(guo)敏??(min)原??(yuan)是??(shi)花?(hua)粉??(fen)??，過?(guo)敏?(min)原??(yuan)傳??(chuan)播??(bo)的??(de)媒??(mei)介??(jie)主??(zhu)要?(yao)是??(shi)風(fēng)??(feng)??。在??(zai)我??(wo)國??(guo)??，不??(bu)同??(tong)地??(di)區(qū)??(qu)的??(de)氣?(qi)傳??(chuan)花??(hua)粉??(fen)植?(zhi)物??(wu)季??(ji)節(jié)??(jie)分??(fen)布??(bu)特??(te)征??(zheng)因??(yin)氣??(qi)候?(hou)條??(tiao)件??(jian)、植??(zhi)物??(wu)的??(de)物??(wu)候??(hou)條??(tiao)件??(jian)特??(te)征??(zheng)不??(bu)同??(tong)??，存??(cun)在?(zai)一??(yi)定??(ding)差??(cha)異??(yi)??。對(duì)??(dui)于??(yu)北??(bei)京??(jing)來秘(lai)說??(shuo)??，氣??(qi)傳??(chuan)花??(hua)粉??(fen)植??(zhi)物??(wu)的??(de)盛??(sheng)花??(hua)期??(qi)主??(zhu)要??(yao)分??(fen)為??(wei)2個(gè)??(ge)高??(gao)峰??(feng)期??(qi)??，那??(na)么??(me)花?(hua)粉??(fen)過??(guo)敏??(min)的??(de)流??(liu)行??(xing)也?(ye)就??(jiu)相??(xiang)應(yīng)??(ying)存??(cun)在??(zai)兩??(liang)個(gè)??(ge)高?(gao)發(fā)??(fa)期??(qi)??。。