共查询到19条相似文献,搜索用时 203 毫秒
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为探索适合辽西半干旱区油松的最佳造林方式,对容器苗造林、塑料袋保苗造林、裸根造林3种方式进行比较试验。结果表明:容器苗造林方式下苗木保水性好,造林的成活率及保存率最高,造林的成本显著低于裸根造林;塑料袋保苗造林方式下苗木的保水性、成活率等均好于裸根造林方式,其造林成本最低。 相似文献
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樟子松是大兴安岭地带性森林植被的建群乔木树种,是半干旱风沙草原区营造防风固沙林、水土保持林,草牧场防护林和用材林的主要造林树木之一。传统造林工艺技术主要是春季裸根苗造林,因小苗失水过多,降低了造林成活率,延长了苗木的缓苗期。研究解决樟子松抗旱造林工艺技术,提高樟子松造林“三率”,扩大樟子松造林比例,加快防护林体系建设速度,意义很大。一、新工艺技术要点和试验内容、方法(一)新工艺技术要点改革传统樟子松造林工艺技术的要点是变小苗直接大面积造林的粗放经营,为小苗就近集中培育大苗的集约经营;变春季裸根小苗造林为多季带土坨大苗就近移植造林;变密植为稀植、一次成林。这样做不仅调整了育苗地与造林地生态条件差异过大的矛盾,而且采取大苗壮苗,移植时带土坨伤根很轻,根系基本完整,外生菌根不损失,为提高“三率”奠定了基础。(二)试验内容和方法本试验结合生产集中培育大苗。试验地 相似文献
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围场满族蒙古族自治县,地处河北省最北部,是一个八山一水一分田的山区县,县内阳坡面积大,坡度陡,土壤干旱瘠薄,石块多,加上春季十年九旱、大风日数多的不利气象因素,不但针叶树裸根植苗和直播造林成活率低,一般的容器苗造林也难成功.针对这种情况,技术人员研究了适应干旱立地类型的容器,经过试验,从十几种容器中筛选出30cm×14cm的塑料袋容器,采用移植成苗的育苗形式,确定了耐干旱、耐瘠薄的针叶树种油松、樟子松为容器育苗的主要树种,这种容器育苗方法,在围场由示范、试验到推广,取得了较好的生态效益、社会效益、经济效益.特别是实施退耕还林、防沙治沙、中德合作造林项目以来,全县年育塑料袋容器苗在600万株以上,造林成活率均在90%以上.深受广大造林户的喜爱,它是解决干旱阳坡、沙地造林难得的最佳途径. 相似文献
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针叶树幼树移栽与容器大苗造林试验 总被引:2,自引:0,他引:2
为了提高半干旱地区针叶树造林的成活率,在内蒙古奈曼旗兴隆沼林场开展了针叶树幼树带土坨移植试验与塑料容器大苗造林试验。结果表明,8年生境子松幼树移植成活率达88% ̄98%;4年生不同树种容器苗造林成话率达76% ̄87%。樟子松容器苗成活率比裸根苗高53%;流动风沙土造林地比生草风沙土造林地高45%。 相似文献
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为解决辽西北干旱半干旱石质山区造林成活率和保存率低的问题,选取抗旱能力较强的侧柏为供试树种,采用鱼鳞坑整地方式,分别采用常规植苗造林、覆膜造林及客土袋造林方法进行造林试验,当年入冬前调查成活率,3年后调查保存率,并对其进行统计分析。结果表明:应用客土袋造林方法林木成活率和保存率显著高于其他2种方法,确定客土袋造林方法为最适合石质山地的造林技术。 相似文献
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油茶大规格容器苗质量及其造林效果评价 总被引:1,自引:0,他引:1
为了筛选出适宜的容器规格、育苗基质及造林苗木规格,从而为油茶育苗和造林质量的提高提供技术依据,采用芽苗砧嫁接容器育苗方法,就不同规格的容器与不同类型的基质对容器苗质量的影响情况进行了试验研究,并对采用大规格容器苗的造林效果进行了调查与评价。试验结果表明:以大规格容器和轻基质培育的苗木其生长状况与根系质量均良好;运用3年生容器大苗造林的成活率平均为96.32%,其树高1.74 m、地径34.45 mm、冠幅1.07 m^2,当年挂果率达96.67%。研究结果表明:油茶大容器轻基质育苗和造林具有生产可行性,但相关技术还有待进一步优化与推广。 相似文献
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This review examines the published work on bareroot and container stocktypes in forest restoration programs. The objective was to define overall trends between these two stocktypes and describe what they mean in terms of available information on their nursery and field performance. Stock quality assessments show bareroot seedlings have larger shoot systems because they are typically grown at lower densities, and in many instances longer timeframes, than container seedlings. Container systems typically produce seedlings having a lower shoot to root ratio and a greater root growth potential, conferring greater drought avoidance potential. However, assessments of stress resistance and nutrition found no conclusive evidence that either stocktype has a performance advantage, other than the container plug acting as a source of water and nutrient storage available for outplanting performance. Bareroot seedlings are more sensitive to handling practices of lifting, storage, transport and planting and these practices can negatively affect their performance. Container seedlings can have a higher level of field survival which is related, in part, to their greater drought avoidance potential, thereby overcoming planting stress. Bareroot and container seedlings have comparable survival rates on sites with minimal planting stress. Once seedlings are established, bareroot and container seedlings can have comparable field performance. In many instances where plant competition is the main limiting site variable, larger sized bareroot and container stocktypes have the best chance for successful stand establishment. The lack of a natural root form and root distribution for both stocktypes is a debated mechanical stability issue, though risks of windthrow have not been consistently demonstrated for either stocktype. 相似文献
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Philip M. McDonald 《New Forests》1991,5(2):147-156
Ponderosa pine, Jeffrey pine, and Douglas-fir seedlings were planted in container or bareroot form at three elevations in northern California. At the lowest elevation (762 m), container seedlings of ponderosa pine were significantly taller than bareroot seedlings at ages 4 and 10, and had breast-height diameters that were significantly larger than bareroot counterparts at age 10. Survival of Douglas-fir container seedlings was significantly greater than that of barefoot seedlings for all ages tested. At the mid-elevation site (1220 m), container seedlings of ponderosa pine and Douglas-fir were significantly larger in breast-height diameter than bareroot seedlings at age 10. Douglas-fir container seedlings survived significantly better at all ages than barefoot seedlings. At the highest elevation (1662 m), seedling height and diameter did not differ significantly, but survival of container seedlings was significantly higher than barefoot seedlings for both pine species at all ages tested. 相似文献
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不同类型薄壳山核桃苗木栽植效果研究 总被引:2,自引:0,他引:2
以淮安地区种植园的1年生和泰州地区种植园的2年生‘波尼’薄壳山核桃苗为试材,研究裸根苗、土球苗、无纺布容器苗等3种不同类型薄壳山核桃苗栽植后生长发育的差异。结果表明:3种类型苗木栽植后新梢和根系生长差异较为显著。两处均以无纺布容器苗成活率最高,达到100%;新梢生长量最大,1年生和2年生苗木的生长量分别为110.77 cm和53.44 cm;根系也最为发达。土球苗次之,裸根苗的新梢、根系生长量最小。分析表明,在江苏淮安和泰州这两个地区,无纺布容器苗的成活率、平均新梢生长量、分枝数、总的新梢生长量、主根长度、粗度、侧根数量等均优于土球苗和裸根苗的。此外,3种类型苗木栽植后,2年生苗木的地上、地下部分生长均优于1年生苗木的。 相似文献
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进行样地调查与树干解析,以研究米槠生长过程。采用米槠容器苗和裸根苗造林,比较造林保存率、胸径、树高、冠幅、变异系数等指标,以了解两种苗木的幼林生长效应,并比较天然林与人工林米槠的早期生长。研究表明,米槠在10-20 a,树高、胸径生长较快;14-30 a,材积生长较快;树龄33 a时,尚未达到数量成熟阶段。米槠容器苗造林的保存率、胸径、树高值均大于裸根苗,其中保存率比裸根苗高9.5%,胸径值大11.3%,树高值大4.6%。比较人工林和天然林的早期生长,人工林树高和胸径值均大于天然林。米槠容器苗造林,可以促进米槠生长,取得较好的造林效果。 相似文献