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文章根据培养基类型、细胞分裂素浓度及生长素浓度的不同采用L9(3)4正交设计对笃丝越橘组织培养的增殖生长进行试验。 相似文献
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不同容器类型和规格对容器苗生长的影响 总被引:1,自引:0,他引:1
通过采用不同类型和不同规格的容器育苗试验,发现塑料薄膜育苗容器在幼苗成活率、幼苗的苗高和地径生长量3个方面均表现出明显优势;用10cm×15cm规格的容器育苗不仅成本低且苗木生长良好。在容器育苗袋不同处理的试验中,发现采用有底袋(剪角)、打孔袋较好,不仅使基质通气透水、而且有利于温度调节,从而提高苗木根系的生根率,促进根系的发育。 相似文献
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为探究不同品种杉木(Cunninghamia lanceolata)轻型基质容器苗生长表现,以杉木扦插无性系容器苗、杉木第3代种子园实生容器苗和红心杉种子园实生容器苗为研究对象,以红心杉种子园实生容器苗为对照(CK),于2020年12月测定了各品种苗木生长量、生物量和测算苗木质量指数QI值,分析了不同品种杉木容器苗生长表现差异,结果表明:杉木扦插无性系容器苗相对对照(CK)的苗高、地径和总生物量相比分别增长了3.8%、16.6%和70.6%;杉木第3代种子园实生容器苗相对对照(CK)的苗高、地径和总生物量相比分别增长了15.1%、16.1%和27.5%,杉木扦插无性系容器苗QI值最大,其次为杉木第3代种子园实生容器苗,最小为对照(CK),综合分析杉木扦插无性系容器苗表现最优。 相似文献
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通过对龙眼不同结果母枝成花效果的调查和分析,认为暖冬气候条件下,晚秋梢最利于龙眼成花和保证丰产稳产的适宜结果母枝。 相似文献
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《林业实用技术》2017,(7)
采用不同基质培养红桦(Betula albo-sinensis Burk.)苗木,观察不同处理对容器苗生物量和地下部根系指标的影响,以期为红桦基质容器育苗提供理论依据。试验设定4个处理,分别是:常规营养土(CK),木耳废弃菌棒+落叶松松针腐殖质+蛭石混合物(Z1),玉米腐熟穗芯+落叶松松针腐殖质+蛭石混合物(Z2),草炭土+落叶松松针腐殖质+蛭石混合物(Z3)。结果表明Z1处理下,根系的比根长、总表面积和总根尖数最大,分别比CK提高了29.7%、49%和87%。根系直径表现为Z2最粗,为0.73cm,是对照的2.13倍。Z3根、茎、叶和总质量的干质量均最大,分别比CK提高了1.37倍、2.41倍、0.88倍和1.24倍。可见木耳废弃菌棒+落叶松松针腐殖质+蛭石的育苗基质有利于根系的发育,而草炭土+落叶松松针腐殖质+蛭石的育苗基质有利于干质量的增加,最有利于红桦的生长。考虑到草炭土价格较贵,且不可再生,所以,建议推广木耳废弃菌棒+落叶松松针腐殖质+蛭石的红桦育苗基质。 相似文献
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不同轻型基质对马尾松容器苗生长的影响 总被引:5,自引:0,他引:5
试验表明,不同轻型基质配方对马尾松容器苗有重要影响,生长差异明显,方差分析和多重比较表明,大部分达到了极显著和显著差异。在几个方面同时表现较好的配方是:3号(泥炭土0.2+锯屑0.8)、6号(炭土0.6+锯屑0.2+稻谷壳0.2)和13号(泥炭土0.46+锯屑0.27+稻谷壳0.27),可在生产中推广应用。 相似文献
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对莆田市主栽龙眼品种之一乌龙岭进行了植物生长调节剂控梢促花试验,结果表明:单用PP333控梢促花效果并不明显,配合乙烯利有明显的控梢和促花效应,第2 a结合氯酸钾使用促花效果更好。 相似文献
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中国石柱参生长特征研究 总被引:4,自引:0,他引:4
通过对中国石柱参生长的生态环境、采用的品种类型以及独特的栽培方式等特点进行综合分析,认为中国石柱参是在特有的生态环境条件下,采用特有的品种类型以及近于园参又不完全同于园参的栽培方式,经10a以上培育的具有野生人参基本形体特征和相应价值的高档次商品人参。同时,通过对12a以下各龄参生长特征的调查表明,石柱参生长缓慢,茎高、叶面积都较小,叶片瘦长,6-12年生叶形态基本上都为3枚和4枚掌状复叶,根部生长缓慢,芦头生长较快,12年已基本形成了山参的形体特征。 相似文献
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《Scandinavian Journal of Forest Research》2012,27(1-4):441-453
Cuttings were made from six‐year‐old seedlings of Picea abies L. (Karst.) that had been studied in the Stockholm phytotron. The seedlings belonged to four full‐sib families, one being of French origin, one of North‐Swedish origin and two being hybrids between parents of North‐Swedish and French origin. Nine clones from each family were included. After the rooting phase, the cuttings were exposed to the same cultivation regimes as the seedling ortets. Characteristics of growth rhythm, percentage free growth and leader length were recorded during the 2nd to the 5th growth period (GP). Plagiotropic growth habit was recorded in the 3rd to the 5th growth period, and, characteristics of the rooting phase were studied. A juvenile behaviour very similar to that characterizing growth periods 2–3 of the seedlings was observed for growth rhythm characteristics and for free growth capacity during GP2 of the cuttings. The absolute value of the differences between each observation of the seedling ortets in GP6 and the means of the cuttings in GP2 produced a new variable that quantified the degree of rejuvenation. This new variable was meaningfully calculated only for growth rhythm and growth pattern variables. A gradual reversion of the growth rhythm occurred for the cuttings, which corresponded to the change with increasing age for the seedlings. The capacity for free growth, on the contrary, disappeared already in GP3 for the cuttings, except for the French family. A large variation in the rejuvenation ability between families was observed. Furthermore, the rejuvenation ability was negatively correlated with the ability to grow plagiotropically. 相似文献
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杉木是我国南方最重要的造林树种之一,在木材安全重大战略中具有举足轻重的地位。株型是决定杉木产量的核心要素,掌握理想株型的性状组成对提高杉木产量具有重要的意义。本研究对来自福建省洋口国有林场的14个杉木组培无性系造林后3 a内生长量和造林后第2年的形态指标进行比较与分析,研究试验林分郁闭前幼树阶段的形态与和生长特点以及它们之间的关系,为杉木理想型无性系的选择和不同株型的定向培育方法提供理论依据。结果表明:1)造林后1至3年林分树高的平均值分别为1.00、2.52和3.87 m,第3年的胸径平均值为4.76 cm,无性系的树高生长变异系数随着生长时间的增长呈下降的趋势,不同无性系的生长量之间存在极显著的差异;其中除020在高生长上优势明显外,054、061、063和023在3 a内的树高和胸径生长均具有较大的优势。2)造林后第2年坐生密度、冠幅、枝盘数、当年生节间距离、一级侧枝数和年盘二级分枝数的平均值分别为63.58片、176.1 cm、6.11、21.76 cm、21.02和19.88,且不同无性系之间存在极显著的差异;说明杉木株型之间的差异较大。3)通过聚类分析将无性系063、054及061归为浓密型杉木,无性系047、148、023及049归为稀疏型。4)生长与形态之间的相关性分析表明浓密型杉木的生长量更大,根据以上的分析初步认定,在生长初期,杉木的理想株型具有枝条浓密和冠幅宽大的特点。 相似文献
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《Scandinavian Journal of Forest Research》2012,27(1-4):147-156
The causal relationships between shoot growth variables were analysed on the basis of a study in the Phytotron where six full‐sib families of Picea abies L. (Karst.) were grown for six growth periods. Phenotypic correlations and path analysis were used for the analysis of causes. The phenotypic correlations were estimated in three different ways: 1) separate analyses within each growth period based on individual tree data, 2) based on family means at different growth periods (0, and 3) using differences in family means between two consecutive growth periods (dt). The two methods based on t or dt‐values gave different results in a number of cases. We argue that, because of the rapid concurrent changes that occurred between growth periods, we could not conclude that the correlations based on family means (t) reflected causal relations and, also, that the method based on dt‐values gives a better indication of causal relationships between different variables. Using dt‐values, the variation in shoot elongation period was mainly explained by the variation in free growth (82%) while the variation in shoot growth initiation only explained a minor fraction. Variation in leader length was mainly explained by growth rate and only to a minor extent by shoot elongation period, meaning that the observed decrease in shoot elongation period did not cause a corresponding changé in leader length. One conclusion from this finding is that we do not necessarily lose growth capacity if we breed for a better adapted growth rhythm (i.e. shorter shoot elongation period) of the seedlings. 相似文献
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施肥对金银花生长开花影响的试验研究 总被引:1,自引:1,他引:0
通过氮肥、磷肥、钾肥、复合肥4种肥料对比试验,结果表明:施复合肥可显著提高枝条的长度,而氮肥、磷肥、钾肥提高不甚明显。复合肥与氮肥对金银花植株的生长有明显的促进作用,而磷、钾肥影响不明显。氮、磷、钾及复合肥均可促进金银花植株的花芽分化,促进的大小顺序是氮肥〉复合肥〉磷肥〉钾肥。氮肥能使叶、花中绿原酸含量降低,但能使叶、花的产量大幅度提高,而磷肥却能提高叶、花中绿原酸的含量。因此,我们在生产中施氮肥的同时,适当多施磷肥,这样即能促进金银花植株花芽分化,又能达到增产的目的。 相似文献
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在智能化温室内,通过盆栽试验,采用指标测量、差异显著性检验等方法,得出:不同日温、光照等条件对蝴蝶兰的生长和开花均有显著的影响,蝴蝶兰最适宜的栽培日温是26℃,当室外光强超过20000Lx开始遮光,小于20000Lx合拢遮阳幕,植株长势和开花性状最好。 相似文献
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不同红松种源材质性状和生长性状的遗传变异 总被引:1,自引:0,他引:1
在东北林业大学帽儿山实验林场,选择了26个17年生红松种源实验林作为研究对象,进行了木材材质性状和生长性状的调查。材质性状包括解剖学性状和物理学性状。解剖学性状测试指标包括,管胞长度、管胞直径和管胞壁腔比。物理学性状指标测定了:生长轮宽度、晚材率和生长轮密度。生长性状方面调查了树高和胸径。统计分析结果表明:各项材质性状和生长性状指标在种源间均存在着显著差异,同时证明各项材质性状均受一定的遗传效应控制;红松的生长性状指标在不同种源间也存在着较大的变异,红松的树高和胸径也受遗传效应的控制;但是,多数材质指标表现为一定的以经向为主的地理变异规律,而红松的生长性状指标如树高和胸径均呈现出一定的纬向变异规律,无经向变异规律。图2表5参6。 相似文献