共查询到20条相似文献，搜索用时 140 毫秒
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刺楸是集用材、绿化、食用和药用于一身的高价值树种。生产上,存在苗木繁育技术不完善的问题,一定程度上制约了该树种的产业发展。该文从播种育苗技术和无性繁育技术（根繁和组织培养）两个方面总结了我国刺楸育苗技术的研究现状,指出当前刺楸育苗技术存在的问题并提出发展建议,旨在为完善刺楸育苗技术,促进刺楸产业发展提供指导与参考。 相似文献
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Planting stock type and quality can have an important impact on early growth rates of plantations. The goal of this study was to evaluate early growth and root/shoot development of different planting materials in typical heavy clay soils of northwestern Quebec. Using one-year-old bareroot hybrid poplar dormant stock, four planting materials were compared: (1) regular bareroot stock, (2) rootstock (stem pruned before planting), (3) whips (roots pruned before planting), and (4) cuttings (30 cm stem sections taken from the basal portion of bareroot trees, i.e. roots and shoot pruned). Rooted stock types (bareroot and rootstock) produced, on average, 1.2 times larger trees than unrooted stock types (cuttings and whips). However, shoot-pruned stock types (rootstocks and cuttings) reached similar heights and basal diameters as unpruned stock types (bareroots and whips), during the first growing season. Shoot pruning reduced leaf carbon isotopic ratios, suggesting that unpruned stock types were water-stressed during the first growing season. The stress was most likely caused by early leaf development while root growth occurred later in the summer. We conclude that shoot pruning bareroot stock is a useful management option to reduce planting stress without compromising early growth rates of hybrid poplars. 相似文献
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With the increased availability of cell grown broadleaved plantingstock on the UK market there has been a need to evaluate itsplace in amenity and forestry planting. The results of threeexperiments using oak and beech seedlings grown in three typesof modular cell or as undercut bare-rooted stock are described.Plants were subjected to poor plant handling, planting outsidethe normal season, cold storage and different planting methods. The results demonstrate that, one season after outplanting,cell grown stock was more resistant to poor standards of planthandling, and being planted outside the normal planting season,compared with bare-rooted stock. On the other hand, there wereno significant differences between the stock types due to coldstorage or planting method. The difficulties of conducting trials between stock types arediscussed. The development of a Plant Quality Index which describesthe morphological and physiological features of good plantingstock, and the assessment of complete establishment systemsis advocated as a better approach. 相似文献
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对西吉县梯田地埂灌木树种(以杞柳和柠条为主)的栽培技术进行了研究。结果表明：(1)造林整地时，梯形槽和鱼鳞坑整地均可，整地深度以40cm左右为宜，整地时间以雨季预整地最佳；(2)造林方法要根据具体树种而定。柠条最好选择植苗造林，春秋皆宜，杞柳适宜秋季造林，总体上秋造的苗木成活率和存活率明显好于春造。另外，在柠条播种造林时，坡向最好在阴坡；(3)杞柳造林时的种植深度以种条覆土2cm最佳，适宜的几种种植深度模式为：阳坡种条覆土2cm、阴坡种条齐地面、阴坡种条覆土2cm；(4)造林整地、种植深度对苗木生长量的影响较大，造林方法、造林坡向、种植深度对造林成活率和保存率的影响相对显著。 相似文献
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通过不同试验材料、GA3应用和变温层积催芽对比试验,对刺楸种子解除休眠进行研究的结果表明:鲜种+GA3+(15℃,30 d;冷冻,90 d;-4~0℃,90 d)处理方法发芽率达到90.2%,出苗率达到81.5%;气干种温水(72 h)+GA3+(13~18℃,90 d;0~4℃,90 d)处理方法发芽率达到76.3%,出苗率达到66.4%。采用鲜种进行变温催芽处理对刺楸种子发芽率、出苗率和1年生苗木质量提高具有显著作用(p<0.01和p<0.05)。研究表明,刺楸种子属于形态-生理休眠类型,采用鲜种+GA3+变温层积催芽的综合处理方法能有效解除刺楸种子休眠。 相似文献
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Vegetative propagation of Acacia senegal is possible from branch fragments taken from the crown of mature trees (13 years old), without causing ortet destruction.The most responsive planting stock is taken from cuttings 15 cm long (with 12 to 15 nodes) and a diameter of 10 ± 6 mm (wood of 2 to 4 years old). With this material, the ablation of the leaves prior to planting is a factor which furthers development of the cutting's root system.The development of the root system is also highly influenced by the time at which the cutting is taken: results vary from 10% during the dry season to more than 70% during the rainy season (June—October).Cuttings can be taken from branches 50 cm long. It is thus possible to preserve the planting stock for 8 days in a continually humidified jute cloth and then to make the cuttings at the time of establishment in a nursery, without changing their rhizogenic aptitude.The cuttings show characteristics of maturity (slow growth, plagiotropy, fructification). It is nevertheless possible to preserve the collected genotypes in the field, or better, in planting pots in the nursery, so as to further the process of physiologic rejuvenation with the aim of in vitro cloning.researcher at CIRAD/C.T.F.T., detached to ISRA/D.R.P.F. 相似文献
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通过对红松、刺楸人工混交林,红松纯林物种多样性的研究,结果表明,红松、刺楸混交林物种丰富度最大,植物种类最多,红松纯林仅为混交林的43%,总数量为混交林的32%,红松、刺楸混交林乔木层多样性指数为1.430 5,均匀度指数为0.687 9,优势度指数为0.290 6,丰富度指数为1.413 7,而红松纯林多样性指数、均匀度指数均为0,优势度指数为1,丰富度指数为0.371 2。在灌木层中,混交林与纯林各项指标区别不大,只有丰富度指数为混交林(纯林。在草本层中,混交林各项指数基本都大于纯林,只有均匀度指数红松纯林(混交林。 相似文献
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在景谷县大黄栀子多年来的种植基础上,探讨了景谷县大黄栀子的主要技术措施,内容包括：采种、育苗、选地、整地、定植、初植、密度、病虫害、抚育管理,为进一步推动景谷县发展山区经济、增加农民收入、调整产业结构提供科学和实践依据。 相似文献