赤霉素（GA3）、吲哚丁酸（IBA）和稀土对锥栗产量促进作用的研究

运用双因素随机区组设计方案，研究了稀土、赤霉素（GA3）和吲哚丁酸（IBA）三种植物生长调节剂对三信锥栗品种无性系产量增加的影响。结果表明：稀土微肥不员浓度喷施对产量有显著的影响，以400ppm(A1)为最佳；两种生长调节剂中，则以GA3的效果更好（B1）；AB因素两种组合的混合喷施对产量的促进有交互作用，各种组合中以A1B1，即稀土浓度为400ppm，GA3浓度为50ppm的交互效应对产量的提高最显著。     

几种植物生长调节剂对幼龄板栗生长及结果的影响

本研究则通过植物生长调节剂处理板栗幼树 ,探讨它们对幼龄板栗生长及结果的影响 ,从而为板栗的早期丰产提供化学调控的技术。表 1　处理设计处理号处理内容浓度1清水 (CK)2 GA310 0 ppm3GA32 0 0 ppm4 GA35 0 0 ppm5 PP33310 0 0 ppm6 PP3332 0 0 0 ppm7PP33330 0 0 ppm8B910 0 0 ppm9B92 0 0 0 ppm10 B910 0 0 ppm+0 .5 %尿素 +0 .3KH2 PO411B92 0 0 0 ppm+0 .5 % +0 .3% KH2 PO41　实验材料与方法本试验设在武汉市林果所板栗品种试验园 ,试验品种为中迟栗 ,树龄 3年。采取每小区 2株 3次重复 ,共设 11个处理 (含对照处理 )。…     

不同生长调节剂对擎天树幼苗高生长的影响

本文主要研究擎天树在不同生长调节剂喷施条件下,高生长状况揭示不同生长调节剂种类及浓度对擎天树幼苗高生长的影响。为其优良种源苗木及壮苗培育提供科学依据。本研究采用随机区组试验设计,应用盆栽土培试验方法,用GGR、IBA、PP333分别配制成20ppm,40ppm,80ppm,160ppm四种浓度的溶液,对擎天树幼苗进行定期的整株喷施,以清水喷施为对照。试验结果表明:GGR20ppm,GGR40ppm,IBA20ppm处理对擎天树幼苗高生长影响显著。     

5种药剂对天然山杏林生长的影响

为研究不同药剂及其不同浓度对山杏生长量和杏仁产量的影响,2011年4～9月,在乌兰察布市上高台林场内山杏天然林喷施5种药剂进行对比观测。结果表明：1）B9推迟花期、提高成花率都高于硼酸。2）稀土1 000 ppm、防落素25 ppm坐果率最高,分别可提高12.0%、10.6%。3）药剂的喷施对山杏果实影响显著,而对枝、叶影响不明显。4）各药剂不同浓度对山杏产量影响可分为3类,第Ⅰ类显著影响共7个,第Ⅱ类影响共3个,第Ⅲ类影响不显著共5个。     

柚木无性系扦插育苗研究

以3月龄柚木嫩枝为材料,采用基质、生长调节剂种类及其浓度三因素正交实验设计,研究各因素对柚木扦插育苗的影响,并运用隶属函数法对各处理组合的育苗效果进行综合评价。结果表明:两个无性系的扦插育苗效果明显存在差异,7029无性系的生根率和株高均极显著高于7514无性系(P 0.01);三因素中生长调节剂种类对插穗生根影响最大,尤以IAA扦插育苗效果最佳,生根率、根生物量、叶面积和株高均优于另外两种生长调节剂;3种扦插基质中A3的生根率、根系直径和根体积均优于基质A1和A2,在叶面积和株高方面基质A2最优;生长调节剂浓度对插穗生根率以及根系生长均无显著影响(P≥0.05);通过隶属函数综合评价选出处理4(基质A2+生长调节剂NAA+浓度200 mg/kg)为7029无性系扦插育苗效果最佳的组合;处理9(基质A3+生长调节剂IAA+浓度200 mg/kg)为7514无性系扦插育苗效果最佳的组合。     

几种肥料营养剂和植物生长调节剂混合喷施平菇的正交试验

选用稀土、油菜素内酯、磷酸二氢钾和尿素4种物质，分别以3种水平，采用正交设计于平菇出菇期间进行混合喷施处理，试验结果表明：油菜素内酯、稀土是这些混合中影响平菇产量的两大主导因素，且初步得出它们混合喷施平菇的理想组合为A3B3C3D1；方差分析表明稀土、油菜素内酯均达到了显著差异水平，并通过多重比较最终确认为100－200mg／L的稀土、0.8mg/L的油菜素内酯、0.5-2g/L的磷酸二氢钾、0.5-2g/L的尿素的混合溶液为喷施产菇的最佳配方组合。     

植物生长调节剂对油茶果实含油率的影响

以油茶优良无性系为材料,对其喷施植物生长调节剂,测定油茶果实含油率的变化情况.结果表明:不同生长调节剂对油茶鲜果含油率的影响差异很大,B-9、GA和乙烯利等3种生长调节剂对油茶鲜果含油量的提高有明显的促进作用,比对照增22.4%、16.2%和11.2%,喷施生长调节剂后,还可使油茶鲜果含油量的快速积累提前到9月上旬;叶面喷施GA和B-9可以促进油茶种仁含油量提高42.6%和40.4%,比对照增18.0%和11.9%;喷施稀土和NAA对提高种仁含油率有反作用;油茶鲜果出籽率在8月中旬到10月下旬期间,呈现马鞍形增长的趋势,但喷施生长调节剂对其作用不明显;油茶果实后熟期以不同生长调节剂处理,对茶果出油率和出干籽率提高有促进作用,喷施赤霉素加萘乙酸(GA NAA)和只喷施赤霉素(GA)的处理出油率最高达6.01%和5.95%,分别比对照增22.1%和20.9%.     

杉木幼林喷施稀土试验初报

用50、100和150ppm三种浓度的稀土溶液对杉木幼林进行喷施试验,结果可看出这三种浓度溶液对杉木的地径、树高和冠幅生长都有促进作用,其中以100ppm稀土液喷施效果最好。     

不同浓度植物生长调节剂对杉木苗木生理指标的影响

研究了生长调节剂处理杉木苗木对其生长速度的影响。主要采用不同植物生长调节剂(PP333、NAA、GA3)及其浓度(0mg/L、60mg/L、120mg/L、240mg/L、480mg/L)对杉木幼苗进行了叶面喷施试验,经过植物生长调节剂PP333、NAA、GA3及各浓度处理后,对叶绿素和可溶性糖两项生理指标进行了测定,结果表明:GA3、NAA对杉木苗木的叶绿素含量及可溶性糖含量在浓度240mg/L影响最明显。     

植物生长调节剂对锥栗花芽性别分化及结果枝生长的影响

以8年生锥栗‘华栗4号’为试材,在花芽分化期叶面喷施50~500 mg·L-1的6-BA、GA3、CEPA、ABA及IAA 5种植物生长调节剂,研究植物生长调节剂对锥栗性别分化及结果枝生长的影响。结果表明:(1)6-BA能显著提高雌花分化率,增加雌雄花比,其适宜质量浓度为50~250 mg·L-1;GA3能增加雄花序数,减少雌花数,即GA3促进雄花分化;CEPA和ABA的处理均无雌花分化,表明CEPA和ABA对锥栗雌花分化具有显著的抑制作用,且喷施ABA后锥栗雄花序提早脱落;IAA对锥栗性别分化影响不明显。(2)6-BA、GA3、CEPA及IAA均显著地促进结果枝伸长生长,对结果枝加粗生长无明显影响;ABA显著抑制锥栗枝条加粗生长。     

紫叶矮樱组织培养的研究

为了提高紫叶矮樱繁殖系数，对紫叶矮樱的组织培养条件进行了初步研究。结果表明，适合紫叶矮樱嫩茎分化的培养基为MS 6-BA1．0mg／L NAA0．05mg／L GA31．0mg／L 琼脂6．0g／L，附加500mg／L稀土元素；适合生根的培养基为1／2MS IAA1．0mg／L IBA1．0mg／L。     

Vegetative propagation of Aesculus indica through stem cuttings treated with plant growth regulators

Cuttage propagation of Aesculus indica was tested by treatments with different concentrations of indole-3-acetic acid (IAA) @ 2000, 4000 (ppm), indolebutyric acid (IBA) @ 2000, 4000 (ppm) and naphthlcetic acid (NAA) @ 2000, 4000 (ppm) in dry formulation in the Forest Nursery, Faculty of Forestry, SKUAST-K, Shalimar. The cuttings treated with IBA @ 4000 ppm and IBA @ 2000 ppm had a sprouting rate of 75% and 50%, respectively, which was significantly higher than that of control and other treatments. The highest rooting rate (50%) was recorded in the cuttings with the application of IBA @ 4000 ppm. The cuttings treated with IBA @ 2000 ppm had 25% rooting rate. All other treatments along with control (talc powder) failed to induce rooting. It was concluded that IBA @ 4000 ppm was a better-applied concentration for vegetative propagation of A. indica under Kashmir conditions.     

Vegetative propagation of Aesculus indica through stem cuttings treated with plant growth regulators

Cuttage propagation of Aesculus indica was tested by treatments with different concentrations of indole-3-acetic acid (IAA) @ 2000, 4000 (ppm), indolebutyric acid (IBA) @ 2000, 4000 (ppm) and naphthlcetic acid (NAA) @ 2000, 4000 (ppm) in dry formulation in the Forest Nursery, Faculty of Forestry, SKUAST-K, Shalimar. The cuttings treated with IBA @ 4000 ppm and IBA @ 2000 ppm had a sprouting rate of 75% and 50%, respectively, which was significantly higher than that of control and other treatments. The highest rooting rate (50%) was recorded in the cuttings with the application of IBA @ 4000 ppm. The cuttings treated with IBA @ 2000 ppm had 25% rooting rate. All other treatments along with control (talc powder) failed to induce rooting. It was concluded that IBA @ 4000 ppm was a better-applied concentration for vegetative propagation of A. indica under Kashmir conditions. Biography: Mumtaz Majeed (1980– ), male, post graduate in Faculty of Forestry, Sher-e-Kashmir University of Agricultural Science & Technology, Shalimar, Srinagar - 191 121, J&K, India.     

激素和基质对八角金盘扦插生根的影响

以河沙、黄土、河沙＋黄土为扦插基质,采用ABT1、IBA、NAA3种激素对扦条进行处理,研究激素和基质对八角金盘扦插生根的影响。结果表明：高浓度（200—500mg／L）的激素处理有利于扦插生根,低浓度（50-100mg／L）的激素处理效果不明显。河沙、河沙＋黄土、黄土3种基质中,以透气保湿性好的河沙最优。     

几种生根剂对金银忍冬嫩枝扦插育苗作用的试验初报

用IBA、NAA、ABT1、IBA＋NAA四种生根剂,分别以不同浓度,不同浸泡时间处理金银忍冬嫩枝插穗进行扦插育苗试验,结果表明：用IBA 1000×10^-6、处理2s、生根率最高为69.4%;用NAA 1000×10^-6、处理时间2s、生根率最高为90%;用ABT1 200×10^-6、处理时间2h、生根率最高为80.2%;用NAA 100×10^-6＋IBA 50×10^6、处理2h、生根率90%或NAA 50×10^-6＋IBA 100×10^-6、处理12h、生根率90%,用清水处理2h,生根率70.4%,表明用外源激素处理能够提高金银忍冬嫩枝扦插的生根率,增加不定根数量。从上面的方差分析结果综合生根率和生根性状的各项指标,如果选择一种激素,选择NAA 100×10^-6＋IBA50×10^-6、处理2h、生根率90%,效果最为理想。     

Acceleration of Early Growth of Seedlings and Rooted Cuttings of Quercus robur L.

The normal delays in the production of useful planting materialin tree species such as Quercus robur from both seedlings andcuttings can be overcome by growing the plants at relativelyhigh temperature and in continuous light. Top growth could befurther accelerated by application of gibberellic acid (GA3)as foliar spray. There were, however, distinct differences inresponse between seedlings (with a high root: top dry matterratio, 4:1), and freshly rooted cuttings. The latter evincedonly onefifth the seedling response, but when cuttings attainedsimilar root:top ratios, their response reached that of seedlings. GA3 treatment accelerated top growth at the expense of rootgrowth, but a root dip for 4h in 100 ppm indole-3yl-butyricacid (IBA) given to 4-month-old cuttings restored root growthto normal even with GA3 treatment. During rooting, cutting commonlybecame dormant but this was prevented by foliar GA3 sprays.Growth was further and substantially improved by inclusion ofcytokinin in such sprays (benzylandenine purine, BAP). Furtherimprovements of growth were obtained by 5% sucrose suppliedto the foliage. In field experiments, assessing ‘establishment’of seedlings and cuttings, the latter established well but after550 days still had not attained the same root:shoot ratio asseedlings. GA3 (50 ppm) again greatly promoted shoot growth,while BAP increased branching and leaf number; when given togethermaximum leaf numbers and shoot dry weight were obtained, yetroot growth remained normal. Further addition of IBA raisedshoot growth still further, but other characters measured sufferedreductions. The potential use of these findings is discussed.     

Synergism Between IBA and Thiamine for Induction and Growth of Adventitious Roots in Tectona grandis

Abstract

Application of IBA (0, 1000, 2000, and 3000 ppm) and thiamine (0, 200, 400, 600, and 800 ppm) alone or in all possible combinations, was investigated for induction and growth of adventitious roots in branch cuttings of teak (Tectona grandis). Of these, 1000 ppm IBA and 600 ppm thiamine alone or 1000 ppm IBA × 800 ppm thiamine significantly promoted various characteristics of adventitious roots. However, a very strong synergism between IBA and thamine was observed, as the effect of 1000 ppm IBA × 800 ppm thiamine was several fold more pronounced than that of individual application of IBA or thiamine in induction and growth of adventitious roots. Therefore, administration of 1000 ppm IBA × 800 ppm thiamineis recommended for clonal propagation of teak on a large scale.     

Phytohormones and their metabolites during long shoot development in Douglas-fir following cone induction by gibberellin injection

Changes in plant hormones and metabolites in long-shoot stems of interior Douglas-fir (Pseudotsuga menziesii var. glauca (Beissn.) Franco) during cone induction by gibberellic acid (GA) treatment were analyzed by high performance liquid chromatography-electrospray ionization tandem mass spectrometry in multiple reaction monitoring mode. A mixture of GA(4) and GA(7), including small amounts of GA(3) and GA(1), was stem-injected into each tree in amounts of 0, 4, 40 or 400 mg. One week after injection, concentrations of GA(4), GA(7) and GA(3) were elevated in all GA-treated samples. The ratio of GA(4) to GA(7) decreased significantly at Week 3. Absolute concentrations of all gibberellins declined sharply at Week 3 after GA application. After 5 weeks, GA(1) and GA(4) were below detection limits in all samples, and GA(7) and GA(3) were found only in the samples from trees treated with 40 or 400 mg of GA. Endogenous indole-3-acetic acid (IAA) concentrations increased following GA injection, and peaked at Week 2 or Week 3 in the trees treated with 40 or 400 mg GA, respectively. Injection of 400 mg of GA brought about a twofold increase in IAA concentration compared with control values. Injection of 40 and 400 mg of GA caused significant increases in stem dry mass in Week 5. Seed orchard data revealed that injection of either 40 or 400 mg GA enhanced female cone formation, whereas male cone formation was enhanced only by 400 mg GA. Slight decreases in concentrations of abscisic acid (ABA) and isopentenyl adenosine were observed after GA application. No significant changes were detected in the concentrations of ABA metabolites except for a slight decrease in the concentration of 7'-hydroxy ABA. The concentration of ABA declined during the growing season and the concentration of ABA glucose ester increased correspondingly.     

中间锦鸡儿硬枝扦插试验

以中间锦鸡儿为材料进行了硬枝扦插试验,在珍珠岩和粗沙2种不同的基质上进行扦插,分别采用不同浓度的吲哚丁酸(IBA)、奈乙酸(NAA)、ABT1#、ABT2#生根粉进行处理。试验表明:粗沙硬枝扦插较为理想,平均生根率较珍珠岩提高14.1%;不同激素种类对中间锦鸡儿硬枝插穗生根情况影响极显著,珍珠岩基质上扦插,以ABT1#100 ppm和200 ppm生根效果最佳;粗沙基质上扦插,处理浓度以IBA 1000 ppm、ABT1#500 ppm、ABT2#500 ppm对中间锦鸡儿硬枝扦插生根效果最佳。     

几种激素及稀土对牡丹幼苗生长的影响

用GA3、6-BAI、BA、芸苔素内酯、稀土等处理牡丹幼苗,结果表明:几种处理均有效影响牡丹幼苗的生长;对增强牡丹幼苗的叶绿素含量、硝酸还原酶活性和根系活力有积极作用;并在一定程度上提高牡丹幼苗的抗性。综合效果为GA3、稀土、芸苔素内酯对牡丹幼苗生长最有利,IBA、6-BA与前三者相比对牡丹幼苗生长影响较弱。