紅景天的生長特性
首先我們需要了解的是紅景天的基本特征有什么,這樣才能對紅景天有直觀的認識,起碼不會購買到假冒的紅景天。紅景天為多年生草木或灌木植物,生長在海拔800——2500米(mi)高寒無污染地(di)帶的珍稀野生(sheng)植(zhi)物。高10-20厘米。根(gen)粗壯,圓錐(zhui)形,肉質,褐(he)黃色,根(gen)頸部(bu)具多(duo)數須根(gen)。根(gen)莖短(duan),粗狀,圓柱形,被多(duo)數覆瓦狀排(pai)列的鱗片狀的葉(xie)。從(cong)莖頂(ding)端(duan)之葉(xie)腋抽出數條花(hua)莖,花(hua)莖上下部(bu)均(jun)有肉質葉(xie),葉(xie)片橢圓形,邊(bian)緣具鋸齒,先端(duan)尖銳(rui),基部(bu)楔形,幾無柄。聚(ju)傘花(hua)序頂(ding)生,花(hua)紅(hong)色。7-9月采(cai)收(shou)。
紅景天怎么鑒別真假
紅(hong)(hong)景天的鑒別(bie)方(fang)法很多,有性(xing)(xing)狀鑒別(bie)、顯微鑒別(bie)、色(se)譜鑒別(bie)和(he)分子(zi)生物技術,下(xia)面為大家介紹一下(xia)紅(hong)(hong)景天的性(xing)(xing)狀鑒別(bie):
紅景天是景天科多年生草木或(huo)灌木植物,生長在(zai)海拔800-2500米高寒無污染地帶的珍(zhen)稀野(ye)生植(zhi)物。高10-20厘(li)米。已確認的紅(hong)景天超過二百個品種(zhong),當中大約二十多(duo)種(zhong)為亞洲傳統(tong)醫學的常用藥,例(li)如小花紅(hong)景天、大花紅(hong)景天、薔薇紅(hong)景天、圣地紅(hong)景天等。那(nei)么(me),哪種(zhong)紅(hong)景天最(zui)好?
在紅景天那么(me)多品種中,生(sheng)長于海拔(ba) 4300 米以上(shang)的(de)(de)大花紅景(jing)(jing)天是最優(you)良(liang)的(de)(de)品種(zhong)(zhong),其(qi)有效(xiao)成(cheng)份紅景(jing)(jing)天苷的(de)(de)含量(liang)遠遠高(gao)于其(qi)它品種(zhong)(zhong),自(zi)然生(sheng)長的(de)(de)大花紅景(jing)(jing)天需7-8年方可采用,可謂(wei)藥源中的(de)正宗極品,人們習慣上將產自西藏的(de)大花紅景(jing)天稱(cheng)之為“藏域(yu)紅景(jing)天”,謂(wei)之“西藏人參(can)”、“長(chang)生(sheng)不老草(cao)”、“仙賜草(cao)”。
紅景天如何挑選
紅(hong)(hong)(hong)(hong)景天根(gen)莖一般呈圓柱形,粗(cu)短,略彎(wan)曲,表(biao)皮棕色(se)(se)(se)或(huo)者褐色(se)(se)(se),粗(cu)糙有(you)(you)褶皺(zhou),剝(bo)開外皮有(you)(you)一層膜(mo)質黃色(se)(se)(se)表(biao)皮且具(ju)有(you)(you)粉紅(hong)(hong)(hong)(hong)色(se)(se)(se)花紋(wen)(wen),斷面粉紅(hong)(hong)(hong)(hong)色(se)(se)(se)或(huo)紫紅(hong)(hong)(hong)(hong)色(se)(se)(se),有(you)(you)一環紋(wen)(wen),質輕,疏松(song)。紅(hong)(hong)(hong)(hong)景天鑒別(bie)主要還是看其主根(gen)呈圓柱形,粗(cu)短,斷面橙紅(hong)(hong)(hong)(hong)色(se)(se)(se)或(huo)紫紅(hong)(hong)(hong)(hong)色(se)(se)(se),有(you)(you)時具(ju)裂隙。氣芳香(xiang),味微苦澀,后(hou)味甜。
從外(wai)觀上(shang)來說優質(zhi)(zhi)的(de)紅(hong)(hong)(hong)景(jing)(jing)天(tian)(tian)在(zai)日光下顏色會非常(chang)的(de)紅(hong)(hong)(hong),并且正品(pin)紅(hong)(hong)(hong)景(jing)(jing)天(tian)(tian)在(zai)日光下還會越曬越紅(hong)(hong)(hong),這(zhe)個辦法是非常(chang)容易(yi)區分(fen)其他冒充產品(pin)的(de)。優質(zhi)(zhi)紅(hong)(hong)(hong)景(jing)(jing)天(tian)(tian)的(de)質(zhi)(zhi)地(di)是較(jiao)(jiao)軟是非常(chang)適合泡酒、泡茶(cha)用(yong)的(de),但是低(di)海(hai)拔的(de)紅(hong)(hong)(hong)景(jing)(jing)天(tian)(tian)質(zhi)(zhi)地(di)比(bi)(bi)(bi)較(jiao)(jiao)硬(ying),而且不易(yi)切片食用(yong)。高海(hai)拔的(de)紅(hong)(hong)(hong)景(jing)(jing)天(tian)(tian)因為密(mi)度(du)低(di),所以(yi)重量較(jiao)(jiao)輕,而海(hai)拔低(di)的(de)紅(hong)(hong)(hong)景(jing)(jing)天(tian)(tian)會比(bi)(bi)(bi)較(jiao)(jiao)重。當然也可以(yi)從氣味上(shang)簡單的(de)判斷優質(zhi)(zhi)紅(hong)(hong)(hong)景(jing)(jing)天(tian)(tian),優質(zhi)(zhi)紅(hong)(hong)(hong)景(jing)(jing)天(tian)(tian)一般香味比(bi)(bi)(bi)較(jiao)(jiao)濃郁,品(pin)質(zhi)(zhi)一般的(de)紅(hong)(hong)(hong)景(jing)(jing)天(tian)(tian)則比(bi)(bi)(bi)較(jiao)(jiao)淡。