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该试验用带叶硬枝插穗、容器袋混合基质、全光雾扦插法,试验了激素处理、位置效应、插穗粗度和扦插时期等因子对插穗生根的影响。结果是以PRB生根素处理,以顶梢枝作插穗、插穗下剪口落在芽眼处,插穗粗度0.5~0.8cm、在5月下旬扦插的效果最好,生根率达到81.4~100%。 相似文献
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三尖杉扦插育苗技术研究 总被引:2,自引:1,他引:1
对三尖杉不同种源、树龄、插穗类型、插穗处理和基质等多种因素扦插育苗试验结果表明,扦插成活率在种源、插穗类型、基质、ABT生根粉处理×扦插基质和插穗类型×ABT生根粉处理互作效应达显著或极显著水平,不同种源的扦插成活率在60.50% ~ 77.32%,带顶芽插穗易于生根,与不带顶芽插穗相比扦插成活率高10.94% ~ 16.41%,后者采用ABT生根粉处理、黄心土基质扦插效果显著.扦插基质黄心土的成活率明显优于细河沙,前者达84.22%,后者仅为60.51%.4年生母树扦插苗的苗高、地径和分枝数都显著优于2年生母树扦插苗.插穗类型不仅显著影响扦插成活率,而且还明显影响苗木质量,侧枝顶段半木质化枝条的扦插苗不仅成活率高,而且苗高生长量大.地径、分枝数和侧根数三者存在显著的正相关,而地径的大小与插穗的粗细密切相关,因此采用带顶芽的粗壮插穗可培育优质扦插苗. 相似文献
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惠园橄榄扦插繁殖育苗技术的研究 总被引:2,自引:0,他引:2
分年度对惠园橄榄品种扦插繁殖的生根及生长能力与插穗年龄、生根促进剂、扦插时间、扦插基质、插穗长度等相关因素进行研究,结果表明:①扦插后50d开始形成不定根;②插穗年龄、生根促进剂、扦插时间、扦插基质和插穗长度对插穗的生根及生长能力都有显著影响;③选用2年生已充分木质化的枝条作插穗,激素以100×10-6IAA+IBA浸基24h效果最好,基质以细河沙+黄心土(1∶1)为佳,成活率可达89 6%。 相似文献
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对山茶花品种六角红在不同配比基质上进行扦插试验,发现插穗在不同配比基质上的成活率、生根数和根长均存在极显著差异。方差分析结果表明:1)插穗在2/3黄心土+1/3腐熟松针土配比基质上的成活率最高,达92%;生根数最多,为7.20;根长最长,达10.13 cm;2/3黄心土+1/3腐熟松最适宜用于山茶花扦插。2)1/3黄心土+1/3河沙+1/3腐熟松针土也可以作为扦插基质,插穗的成活率达到84.33%。3)插穗在1/2黄心土+1/2河沙上的成活率也达80%,但生根数较少,根系不长。4)插穗在1/2黄心土+1/2草木灰和1/3黄心土+1/3草木灰+1/3河沙这2种配比基质上成活率都很低,并且生根数少,根系生长慢,不适合用作扦插基质。
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本试验研究了不同生长素种类与浓度及处理方法对红花荷扦插苗的成活率、不定根条数以及新叶增长的影响。研究结果表明:NAA 200 mg/L作为红花荷扦插苗的促进剂最理想。 相似文献
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Adventitious rooting in shoot cuttings of neem (Azadirachta indica) and karanj (Pongamia pinnata) was investigated in different seasons. The influence of auxins and B-vitamins (neem only) was evaluated. Maximum rhizogenesis coincided with the emergence of new sprouts i.e. February (neem) and March (karanj). Considering both rooting percentage and root biomass, IBA was the most effective auxin tested. Compared to auxin free controls, IBA (1000 ppm in neem and 800 ppm in karanj) significantly increased adventitious rooting percentage (80 to 100 % respectively), the numbers of roots and root biomass for both species. In neem, B-vitamin treatment yielded 40–50% rooting for cuttings. This was significantly greater than rooting for controls but equivalent to IAA treatments. In neem, some of the cuttings treated with 2000–3000 ppm IBA had well developed root systems without any sprouts. In karanj, all auxin treatments promoted sprouting. The level of total soluble sugars in the rooting zone of neem and karanj was higher in non-rooted than rooted cuttings. 相似文献
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Aging of the donor tree decreased adventitious root formation in shoot cuttings of Tectona grandis Linn. f. (teak). Exogenous application of auxins, i.e., α-naphthalene acetic acid (NAA) and indole-3-butyric acid (IBA) has
a significant positive effect on the percentage of rooting. The maximum percent rooting was obtained with 4,000 ppm IBA as
compared to other treatment. Significant increase in root number was recorded in shoot cuttings treated with 4,000 ppm NAA.
The overall rooting response was better in the treatment with IBA rather than with NAA. Further periodic samples (0, 10, 20,
and 30 days) were taken to assess the total soluble sugar, starch, protein, and peroxidase (PER) activity in the rooting zone
of shoot cuttings of teak during adventitious root formation. Application NAA and IBA to shoot cuttings resulted in an increase
in the level of total soluble sugar, starch, protein, and PER-activity in the rooting zone. The stored carbohydrates were
utilized during adventitious root formation. Hence, total soluble sugar and starch contents of cuttings, irrespective of age
of donor plants, decreased with the passage of time in cuttings planted for rooting. Significant fluctuations were observed
in the protein content of cuttings during the time of root induction. There was an increase in the protein content with the
passage of time from the day of planting up to its 20th day, followed by a sharp decline in the protein content of cuttings
at the 30th day of planting, irrespective of the age of donor plants or the treatment of cuttings with auxins. Irrespective
of donor plant age, PER-activity in the cuttings increased from the day of their planting for rooting up to the 20th day,
and then declined at its 30th day of planting. It was interesting to note that PER-activity remained higher at all stages
in the cuttings of 2-month-old seedlings which rooted profusely as compared to the cuttings of 15- and 30-year-old donor plants
those rooted poorly. This study suggested that the exogenously applied NAA and IBA at different concentration seems to activate
sugar metabolism for release of energy, protein and PER-activity which are necessary for cellular division and differentiation
during adventitious root primordium initiation or development in the rooting zone of shoot cuttings. 相似文献
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Traditional knowledge in northern Ethiopia points towards the root-stimulating properties of the latex found in Euphorbia abyssinica (EAG). Stem cuttings of EAG as well as cuttings of other species treated with EAG latex reportedly root easily in dry soil.
This could be attributable to endogenous auxins contained in the latex. We screened EAG latex for auxins and precursor molecules
using analytical LC-MS/MS, and tested the effect of EAG latex on the rooting of woody cuttings of Boswellia papyrifera, a threatened multipurpose tree. The EAG latex contained indole acetic acid (IAA) (0.06 μg/g latex), an auxin controlling
apical dominance and lateral rooting, as well as IAA metabolites and conjugates. Boswellia cuttings treated with EAG latex rooted significantly sooner and showed higher survival ratios than untreated controls. EAG
is widely available and its latex easy to obtain. Therefore it is a promising source of a natural plant growth regulator which
may be used for improving low technology vegetative propagation of woody species in East and Northeast Africa, including the
threatened Boswellia tree. 相似文献
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Applying auxins to freshly cut basal ends of leafy single-node cuttings of Triplochiton scleroxylon, an important timber tree of West Africa, considerably enhanced rooting percentages. The optimal concentrations in 10 μl MeOH droplets of a 50 : 50 mixture of α-naphthalene acetic acid (NAA) and indole-3-butyric acid (IBA) ranged from 8–40 μg according to clone. Larger amounts, which tended to increase numbers of roots per rooted cutting, inhibited root production in some clones. When applied singly, IBA was more effective than NAA in most clones.Leafless cuttings rarely rooted even when treated with auxins. Rooting occurred following the retention of 5 cm2 of leaf lamina, and was maximal, as judged by rooting percentages, with 50 cm2. The inability of leafless cuttings to root was associated with the rapid depletion of all carbohydrates in stem tissues, while those in unshaded leafy cuttings tended to increase.Percentages of cuttings rooting increased when temperatures of propagating-beds were raised above 20°C, and 28°C was optimal for most clones, especially if treated with auxins. Cutting survival declined above 28°C, although up to 38°C surviving cuttings rooted equally well. 相似文献
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激素处理南方红豆杉扦插生根的研究 总被引:10,自引:5,他引:5
应用吲哚乙酸、吲哚丁酸、奈乙酸三种不同的生长素对插条进行处理,探讨它们在不同扦插基质上的生根率。基质配比采用(4,4)单形重心设计,结果重心设计,结果是:三种生长素中以吲哚乙酸对扦插生根的影响最好,基质以45%黄心土和55%珍珠岩配比效果最好。插穗浸泡时间不同对扦插生根率也产生了显著影响。 相似文献
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Shoot anatomical features viz., number of vessel elements, width and length of vessel and fibre elements were studied in relation
to juvenility/maturity of teak (Tectona grandis Linn. f.). The findings show significant differences in these features, which indicates that variation in shoot anatomy can
be used as a reliable indicator of juvenility/maturity in teak. The effect of age of donor plants and application of auxins
on adventitious root formation in single noded leafy stem cuttings of teak was also investigated. Aging of donor trees suppressed
rooting and sprouting of cuttings, but increased callus formation at the base of cuttings. Per cent rooting and per cent sprouting
in cuttings decreased as age of donor plants increased from 2-months to 15-years and up to 30-years. IBA treatment promoted
per cent rooting as well as per cent sprouting, NAA promoted only rooting and it suppressed sprouting. The effect of auxin
treatment on rooting and sprouting of teak stem cuttings varied with the age of donor plants. Auxin and its concentration,
which suppressed rooting and sprouting in cuttings of younger donor plants, actually promoted rooting when cuttings were taken
from more mature donor plants. It appears that the auxin requirement for causing and promoting rooting in teak cuttings increased
with increasing age of donor plants. The higher auxin requirement for causing and promoting rooting in cuttings of older trees
may be due to a decrease in the content on endogenous auxins or decreased sensitivity of aging tissues to rooting promoters
and /or accumulation of inhibitory substances which inhibit rooting. 相似文献
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《Scandinavian Journal of Forest Research》2012,27(1-4):27-36
Leader shoots from juvenile succulent Norway spruce seedlings were used as cuttings 11 weeks after sowing. The seedlings were grown for 6 additional weeks and then apically dominant and lateral shoots were also used as cuttings. These three cutting categories, leaders, dominants and laterals, rooted 99.4, 99.0 and 97.5 % respectively and performed differently with respect to rooting development, number of roots per cutting and response to IBA and PIBA treatments (synthetic auxins). A large individual variation in number of roots per cutting, which auxin treatments did not reduce, was present within each cutting categoty. Laterals from the three different families included in the study showed a different variation than did leaders and dominants. Generally, the juvenile succulent cuttings were easy to root. Seedlings grown at a rather high light intensity (62 W/m2) had the potential to give good rooting even without hormonal treatments. 相似文献