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当前位置: 首页 > 文章 > 闽楠幼苗对大量元素缺乏的响应 西北林学院学报 2014,29 (2) 61-65
Position: Home > Articles > Effect of Nutritional Deficiency on the Growth of Phoebe bournei Seedling Journal of Northwest Forestry University 2014,29 (2) 61-65

闽楠幼苗对大量元素缺乏的响应

作  者：
王樱琳;韦小丽;段如雁;简才源;张怡
单  位：
贵州大学林学院
关键词：
闽楠;缺素症状;生长;叶绿素荧光参数
摘  要：
探讨营养元素对闽楠幼苗生长和生理的影响,以闽楠当年生幼苗为材料,进行大量元素的缺素培养试验。试验采用砂培法,设置了全素、缺N、缺P、缺K、缺Ca、缺Mg和缺S 7种处理。对不同缺素处理的幼苗症状进行观察,测定其生长和光合荧光参数。结果表明:闽楠幼苗的缺N、缺K和缺Mg幼苗的叶片症状最为明显,表现出叶片黄化、褐斑、脉间失绿、有大小不一的褐色坏死斑点等,而缺Ca与缺S幼苗则无明显叶片症状。在缺N、缺K和缺Mg处理下,闽楠幼苗的苗高、地径、叶面积、生物量均显著下降,缺Mg对叶面积影响最大,缺K对地径和生物量影响最大。缺素处理的闽楠幼苗光合电子传递速率(ETR)均呈线性增加,缺K处理的ETR较其他处理较大,缺Ca处理下的闽楠幼苗的ETR随光合有效辐射(PAR)的增长上升最快,但是缺Ca处理下的闽楠幼苗的Y(Ⅱ)值最小。缺素对闽楠幼苗叶绿素荧光参数都有一定的影响,缺Ca处理下闽楠幼苗的最大荧光产量值(Fm)达到最大,全素处理下的闽楠幼苗的实际光化学量子产量(Y(Ⅱ))高于其他缺素处理,缺Ca处理下的闽楠幼苗的Y(Ⅱ)值最小,全素处理下的非光化学淬灭值(NPQ)均明显低于其他各处理,缺N处理下的闽楠幼苗的最大光化学量子产量值(Fv/Fm)最小。
译  名：
Effect of Nutritional Deficiency on the Growth of Phoebe bournei Seedling
作  者：
WANG Ying-lin;WEI Xiao-li;DUAN Ru-yan;JIAN Cai-yuan;ZHANG Yi;College of Forestry,Guizhou University;
关键词：
phoebe bourne;;nutrient deficiency;;growth;;chlorophyⅡfluorescence parameter
摘  要：
IIn order to investigate the effects of nutritional elements on Phoebe bournei seedling growth and its physiology,one-year-old seedlings of P.bournei were cultured in sand with 7treatments:complete nutrient application(control)and deficiencies of nitrogen(-N),phosphorus(-P),potassium(-K),calcium(-Ca),magnesium(-Mg),and sulfur(-S).Symptoms of the seedlings under different deficiency treatments were observed and their growth and photosynthetic fluorescence parameters were measured. Significant differences in leaf symptoms of-N,-N and-Mg seedlings were observed,such as yellow leaves,brown spots,chlorosis between the veins,different sizes of brown necrotic spots and so on.On the contrary,leaves of-Ca and-S seedlings showed no obvious symptoms.Seedling height,diameter,leaf area and biomass in-N,-K and-Mg treatments decreased significantly.Magnesium deficiency mostly affected the leaf area,and-K treatment had the greatest impact on leaf diameter and biomass.Photosynthetic electron transport rate(ETR)of elements showed a linear increase in deficiency-treated seedlings. Seedlings with-K treatment demonstrated the largest ETR.There existed the strongest positive correlation between ETR and PAR in-Ca treatment seedlings.Element deficiency had a certain influence on theseedlings.Maximum fluorescence yield value(Fm)in-Ca treatment seedlings was the largest but Y(Ⅱ) value was the least;The value of non-photochemical quenching(NPQ)in entire elements treatment seedlings were significantly lower than the others.Nitrogen deficiency treated seedlings had the least maximum photochemical quantum yield value(Fv/Fm).

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