【正文】
溫室中進(jìn)行單因子隨機(jī)區(qū)組實驗。當(dāng)供氮濃度大于200 mg關(guān)鍵詞:一串紅;氮素濃度;無土栽培;營養(yǎng)生長中圖分類號: S 147. 3 文獻(xiàn)標(biāo)識碼: A 文章編號: Effects of Nitrogen Concentration on Growth Developmenth of Soilless Culture of Salvia splendens Ker. –GawlZHANG Le1 ,YANG Xiuzhen1 ,LIU Kefeng2 ,SHAO Weiwei2( of Landscape Architecture,Beijing Forestry University,Beijing 100083,China; of Landscape Department,Beijing University of Agriculture,Beijing 102206,China)Abstracts:[Objective]By studying the different nitrogen fertilizer rates on vegetative growth of soilless culture of Salvia splendens in the greenhouse, in order to provide reasonable fertilizer reference for soilless culture.[Method]Singlefactor randomized block experiment in the greenhouse of Beijing Forestry University using Salvia splendens ‘Vista Shenzi’ and Salvia splendens ‘Yichuan Baifen’ as test materials.[Result] For nitrogen concentrations of less than 25mg ? L1, the two species showed the typical symptoms of nitrogen deficiency: leaves bee yellow and plant stop growing。其生長快、株型飽滿、適應(yīng)性強(qiáng)、花色艷麗,在中國各地普遍栽培,是節(jié)日裝點環(huán)境,烘托喜慶氣氛最為常用的草花。一串紅生長快,對養(yǎng)分要求高,尤其是對氮素的要求較高。試驗于2011年9月至2012 年1月在北京林業(yè)大學(xué)北林科技股份有限公司現(xiàn)代化溫室中進(jìn)行,溫室為雙層瓦楞狀PVC板材雙面屋頂連棟式溫室,溫室環(huán)境可計算機(jī)自動控制,也可人工手動控制。L1,文中分別用N0、NNNNN5表示,每個處理12次重復(fù)。2011年11月5日對植株進(jìn)行摘心,摘心后剩余6片真葉。在60℃烘箱烘干至恒重,分別稱量各器官干物質(zhì)重。2H2OKK2SO4100BH3BO4CaCaCl25H2OFeNa2Fe—EDTA22 結(jié)果與分析 氮素濃度對株高的影響2011年10月30日起,每10天對一串紅株高進(jìn)行調(diào)查,結(jié)果如圖1所示。‘一串白粉’N2至N5處理株高生長較快,與N0和N1處理相比增幅較大。N5處理反而抑制了株高生長,可能是因為氮肥過量損傷了根部。 A‘展望深紫’0102030405060上盆后經(jīng)過天數(shù)(天)Growing days(d)冠幅(cm)Crown width N0N1N2N3N4N5 B‘一串白粉’0102030405060上盆后經(jīng)過天數(shù)(天)Growing days(d)