共查询到19条相似文献，搜索用时 250 毫秒
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为了探索适宜于钩藤幼苗生长的遮阴条件,从而为钩藤人工种植技术的构建提供理论依据,以苗龄为1 a的钩藤为材料,分别设置了轻度遮阴(透光率55%~75%)、中度遮阴(透光率25%~35%)、重度遮阴(透光率5%~15%)等处理,以全光照作为对照(CK),就不同遮阴处理对钩藤幼苗生长的影响情况进行了试验研究,并于定植90 d后测定其形态指标(株高、茎粗、叶面积、叶片数量、分枝数、比叶重)和生理生化指标(叶片光合参数、光合色素含量、含水量、可溶性总糖、可溶性蛋白和丙二醛含量)。结果表明:轻度遮阴处理的钩藤幼苗其株高、茎粗和分枝数均极显著高于全光照、中度遮阴和重度遮阴各处理的;净光合速率、可溶性蛋白质和可溶性糖含量大小均表现为全光照轻度遮阴中度遮阴重度遮阴;叶片含水量、叶绿素总含量均随着遮阴程度的增加而增加;气孔导度表现为轻度遮阴全光照中度遮阴重度遮阴;丙二醛含量表现为轻度遮阴中度遮阴全光照重度遮阴。综合分析钩藤幼苗各项形态指标和生理生化指标的测定结果后认为,透光率为55%~75%的遮阴处理更适于钩藤幼苗的生长。 相似文献
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不同遮阴处理对3种茶花生理特性的影响 总被引：1，自引：0，他引：1
以3个品种的茶花(Camellia)为研究对象,经过3个不同的遮阴(全光照,20%,60%)处理后,测定叶绿素含量、可溶性糖、可溶性蛋白以及游离脯氨酸等生理指标。结果表明:遮阴处理后,叶绿素a、叶绿素b以及叶绿素总量含量增加;而可溶性糖则表现为20%遮阴度>60%遮阴度>全光照;可溶性蛋白与游离脯氨酸在3个品系各遮阴处理之间表现不同。综上表现:20%遮阴度下更适合茶花的生长,香茶花的耐阴性强于其他2种茶花。 相似文献
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研究了不同浓度银杏外种皮汁液浸种对小麦萌发和幼苗生长的影响。结果表明:低浓度浸种液可提高小麦种子的萌发率、发芽势和发芽率;促进幼苗苗高、地上和地下部分生长,其中作用最明显的为100和200倍液。在萌发期,低浓度浸种液促进贮藏物质淀粉的水解,可溶性糖和蛋白质含量提高,而高浓度的处理则抑制淀粉的水解;在幼苗期,低浓度浸种的幼苗叶片叶绿素含量和可溶性糖含量较高;而高浓度浸种小麦幼苗的叶绿素和可溶性糖含量与之相反。 相似文献
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水淹胁迫对尖叶杜英和水蒲桃幼苗生理特征的影响 总被引：2，自引：0，他引：2
以尖叶杜英和水蒲桃幼苗为试验材料,人工模拟水淹胁迫环境,共设置水位在土壤表面和土表上5 cm处2种水淹强度,分别水淹7、14、21、28、35天以及水淹35天后恢复正常生长7天,测定幼苗叶片的叶绿素、可溶性糖、可溶性蛋白、超氧化物歧化酶(SOD)、丙二醛(MDA)含量。结果表明:随着水淹深度的增加,尖叶杜英幼苗的叶绿素含量多显著低于对照,水蒲桃幼苗的叶绿素含量一般大于对照;2种幼苗的可溶性糖含量一般都高于对照,水蒲桃叶片可溶性糖含量的增幅大于尖叶杜英。2种幼苗在水淹深度为5 cm时的可溶性蛋白质含量均显著小于对照。除了水淹35天外,2种幼苗其他水淹处理的SOD活性均显著大于对照;尖叶杜英幼苗的MDA含量比对照显著增加,而水蒲桃幼苗的MDA含量保持稳定。由叶绿素、可溶性糖和丙二醛的变化来判断,水蒲桃的抗水淹能力强于尖叶杜英。 相似文献
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以盆栽试验为基础,按不同的比例混交栽植云南松与旱冬瓜,用氮、磷浓度不同的平衡营养液对幼苗进行处理并测定分析其叶片的叶绿素、可溶性蛋白、可溶性糖含量的变化。结果表明:对于旱冬瓜而言,与云南松幼苗混栽时,磷缺乏会降低幼苗叶绿素的含量,而缺氮则影响较小,并且混栽一定比例的云南松对其幼苗叶绿素含量影响不大;对云南松而言,混栽旱冬瓜则影响明显。苗期营养供应全面时,混栽云南松对旱冬瓜幼苗可溶性蛋白含量影响不大,而当氮磷缺乏或胁迫时将导致其可溶性蛋白含量增加;氮磷缺乏或胁迫和混栽旱冬瓜对云南松幼苗可溶性蛋白含量均具有明显的影响,同时二者还具有明显的交互影响。混栽云南松和氮磷缺乏对旱冬瓜苗期的可溶性糖的积累和运转影响不大;氮磷胁迫和混栽旱冬瓜对云南松幼苗叶片可溶性糖含量均影响较小,但二者的交互影响明显。 相似文献
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为研究遮阴对多年生油用牡丹品种“凤丹”根系生长的影响,以油用牡丹品种“凤丹”为材料进行了试验,设置5种不同程度的遮阴处理：不遮阴(CK)、透光率为全光照的85%(Z1)、70%(Z2)、55%(Z3)和40%(Z4),并对不同处理下油用牡丹根系的总根长、根系总表面积、可溶性蛋白含量、可溶性糖含量、丙二醛(MDA)含量和过氧化物酶(POD)活性进行了分析。结果表明：随着遮阴强度的增加,“凤丹”牡丹幼苗根系总根长以及过氧化物酶的活性有逐渐降低的趋势,根系总表面积、可溶性糖含量和可溶性蛋白含量呈现先升高后降低的趋势,根系丙二醛含量则呈现先降低后升高的趋势。Z1处理的根系总表面积和可溶性糖含量较对照显著升高,其根系丙二醛含量显著低于其他处理。当透光率为全光照的50%～65%时有利于根系维持较高的可溶性蛋白含量。综上所述,试验条件下透光率为全光照85%的轻度遮阴处理有利于“凤丹”幼苗根系保持良好的生理活性,透光率≥55%时显著抑制牡丹根系的生长发育。 相似文献
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《绿色科技》2017,(11)
以灰木莲(Manglietia glauca)、红荷(Schima wallichii)幼苗为试验材料,人工模拟水淹胁迫环境,进行了两个胁迫强度处理(水淹土表0cm、水淹土表5cm),通过测定各树种幼苗叶片的叶绿素、可溶性糖、可溶性蛋白、超氧化物歧化酶(SOD)、丙二醛(MDA)含量,研究了水淹胁迫对这2种幼苗以上生理指标的影响。研究结果表明:随着水淹胁迫深度的增加,灰木莲叶片叶绿素含量呈现小幅波动后升高,红荷幼苗各处理显著低于对照;灰木莲可溶性糖含量在大部分时间处理时与对照无显著差异,甚至低于对照,红荷的各处理均显著高于对照;灰木莲可溶性蛋白质含量上升后下降,红荷蛋白质含量显著下降;两种幼苗的SOD活性有不同程度下降,而丙二醛(MDA)含量上升。 相似文献
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为了了解施肥对紫穗槐幼苗叶片光合生理特性影响,并筛选出单独施肥对其影响的最佳浓度,为紫穗槐人工培育提供理论支撑及技术指导。试验采用了氮、磷、钾3因素3水平单独施肥,研究不同施肥处理对紫穗槐幼苗光合色素以及可溶性糖的影响,并对其进行测量、分析和比较。结果表明：所有施肥处理均增加了紫穗槐幼苗叶绿素a、叶绿素b、类胡萝卜素、花青素和可溶性糖的含量,其中施K2,钾的含量为0.75 g/株,紫穗槐叶片的叶绿素a最高;施P2,磷的含量为0.10 g/株,紫穗槐叶片的叶绿素b、类胡萝卜素、花青素最高;施N3,氮的含量为0.93 g/株,紫穗槐幼苗的可溶性糖含量最高。 相似文献
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为了解不同光照条件下野鸦椿幼苗的生长发育状况和光合生理特性,探讨野鸦椿幼苗生长发育的最佳光照条件。采用遮光方式模拟不同光照强度(全光照,遮光30%、60%和90%),研究野鸦椿幼苗的生长、生物量、光合色素含量、生理指标和光合日变化等光合特性的响应规律。结果表明:随着遮光程度的增加,野鸦椿幼苗的生长量均高于对照,以遮光60%的苗高、地径、根长、根幅的增幅最大;遮光30%、60%处理下其生物量积累较多,植株长势良好,叶色较深;遮光处理后,野鸦椿幼苗的叶绿素a、叶绿素b及叶绿素总量(Chla+Chlb)的含量增加,叶绿素a/b值降低;遮光处理使野鸦椿幼苗叶片可溶性蛋白含量降低,使叶片可溶性糖含量增加;遮光30%、60%处理条件下,叶片中MDA的含量显著低于全光照和遮光90%;随着遮光程度的加强,光合速率不断下降,以遮光30%处理下光合速率较高。因此,在育苗生产中,建议有效辐射强度保持在遮光率为30%~60%的范围,可培育出优良健壮的野鸦椿苗木。 相似文献
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通过对华北落叶松避光遮荫育苗、灌水降湿育苗和锯末覆盖育苗等3种方法育苗效果的调查及分析,结果表明:避光育苗法资金投入较大,不宜采用,其他2种方法产合格苗数量差异极显著,灌水育苗每677 m2产合格苗11.8万株,锯末覆盖法产合格苗21.3万株。得出锯末覆盖法是华北落叶松最佳育苗方法的结论。 相似文献
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A study was conducted to determine the effects of electrostatic field (ESF) treatment on seed germination and seedling growth
of Sorbus pohuashanesis. The experiments were arranged by uniform design computed by the Data Processing System (DPS), including three levels of
seeds soaking time, four levels of ESF intensity and four levels of ESF treatment time, with 12 treatments. Ten seeds were
used in each treatment with three replicates. Seed vigor, seed germinating ability, emergence rate of seedling, survival rate
of seedling, and seedling height and diameter, as well as the change in activities of superoxide dismutase (SOD), soluble
protein contents, total chlorophyll contents, soluble total sugar contents in leaves of S. pohuashanensis seedlings were measured after ESF treatments. The experiment results show that ESF treatment could improve the water absorption
ability of dry seeds of S. pohuashanensis, resulting in fast germination at room temperature under light conditions. Combined treatment of ESF with cold stratification
could increase seed germination percentage significantly (to 42.20%), promote seedling height growth, affect leaf SOD activity,
and could raise contents of total chlorophyll, soluble protein, and total soluble sugar in leaves. Seed soaking time had a
significant effect on seed relative electroconductivity, seed germination under light, SOD activity, soluble protein content
and total soluble sugar content of seedling leaves. ESF intensity exerted a moderate effect on these indexes. ESF treatment
time only had significant effect on total chlorophyll contents, no evident effect on other indexes. 相似文献
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11 种城市木本植物叶片生理物质对遮荫的响应 总被引：2，自引：0，他引：2
通过遮光率45%、75%和全光照3种光生境的植物栽培试验,测定了11种城市木本植物叶片叶绿素、花青素、可溶性糖、淀粉和蛋白质的变化,分析了遮荫对不同木本植物生理物质变化的影响,结果表明,遮荫能增加多数植物的叶绿素含量,明显降低花青素含量,特别是色叶植物,从而影响色叶植物的叶色效果,遮荫可减少色叶植物可溶性糖的含量,而增加非色叶植物可溶性糖含量,但对不同类型植物可溶性糖含量的影响幅度不一;遮荫能减少大多数植物的淀粉含量,但使部分色叶植物的淀粉含量增加,而不同遮荫程度对植物叶片淀粉含量的影响没有明显的规律性;光生境变化对植物叶片蛋白质影响缺乏明显的规律性,影响幅度也不一。 相似文献
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Laurício Endres Celene A. Câmara Vilma M. Ferreira José V. Silva 《Agroforestry Systems》2010,78(3):287-298
The objective of this study was to evaluate the effect of nursery shading on the Yellow-ipe seedling (Tabebuia chrysotricha) growth, photosynthesis, and photosynthetic acclimation after being transferred into direct sunlight. The Yellow-ipe seedlings
were grown under 0, 50, 70 and 95% shade. At the 134th day of sowing, leaf gas exchange and chlorophyll were measured under
current growth shading, after exposure to 15 min and two day full sunlight. With the increase of shading, the Yellow-ipe seedlings
allocated more biomass to the stem and leaves and less to the roots, and there was an increase in the leaf area ratio and
specific leaf area. In relation to 0% of shading there was a increase of 211% in stem, 116% in leaf, and a reduction of 200%
in roots biomass when seedling were grown under 95% of shading. The total biomass accumulation had a high correlation with
collar diameter (r = 0.96). More than 70% of the shading reduced the photosynthesis, and after transferring the seedlings into full sunlight,
more than 50% of the shading induced a reduction in chlorophyll, stomatal conductance, photosynthesis and instantaneous carboxylation
efficiency, suggesting the presence of a photoinhibition process. The Yellow-ipe seedling growth under nursery conditions
should not be done under more than 50% shading, which may result in the lower seedling quality and poorer acclimation to transplantation,
particularly to severe degraded areas with direct sunlight. The species can be used for recovering from totally devastated
forest areas to initial recovery when full canopy are forming. 相似文献
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In this study, we investigated the optimal concentration of nutrient-mist and NaHSO3 for cutting propagation of Juniperus squamata 'Blue Star' , as well as the variation in the contents of chlorophyll in leaves, and solubility carbohydrate,soluble protein and other nutrition in leaves and bases of cuttings during rooting. Cuttings of grade Ⅲ (the lenghth of cutting bases lignified from 0.1 to 0.2 cm) was treated by 1/4MS+NaHSO3(200 mg·L-1),and the rooting rate rose 35% and root qualities were improved compared with control experiment, for there were different effects among three grade cuttings. The treatment of grade Ⅲ cuttings also resulted in higher content of soluble sugar and starch of those bases during rooting, especially obviously different for fifteen days, but less effect on the chlorophyll and some nutrition content of cutting leaves. 相似文献
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为了阐明华北落叶松人工林不同林隙大小对更新的影响规律,对木兰围场低效华北落叶松人工林林隙内苗木更新特性进行了研究。结果表明:林隙内更新苗的主要种类有华北落叶松、山杨和油松。华北落叶松和山杨的密度在林隙面积为120~140m2时最大,达到2 411株/hm2;而油松的密度在林隙面积为20~40m2时最大,为196株/hm2。随着林隙面积的增大,华北落叶松和山杨大径级和大高度级更新幼苗数量基本呈现增加的趋势,在林隙面积达到160~180m2时达到最大值;而油松在40~60m2时达到最大,径级大于2cm的更新苗密度为69株/hm2。 相似文献