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油松容器苗与裸根苗造林效果调查分析 总被引:2,自引:0,他引:2
按照立地条件的不同,采用随机抽样法对渭北黄土高原后沟作业区油松容器苗与裸根苗造林效果进行了调查和分析.结果表明:不同立地条件下.油松容器苗造林成活率、幼树树高生长量均高于裸根苗,而且,不同坡位间容器苗与裸根苗造林成活率存在不同差异. 相似文献
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《浙江林业科技》2016,(3)
2014-2015年,在浙江省缙云县对赤皮青冈(Cyclobalanopsis gilva)、闽楠(Phoebe bournei)、木荷(Schima superba)3种树种进行容器苗和裸根苗在上、中、下3种不同坡位造林试验,并研究其对造林成活率、地径及树高生长量的影响。结果表明:不同树种容器苗造林后树高生长量、地径生长量及造林成活率均显著高于裸根苗;坡位对不同树种造林成活率、地径生长量和树高生长量的影响均表现为下坡中坡上坡;不同树种之间,木荷在各坡位造林的成活率均高于赤皮青冈、闽楠,闽楠则在地径生长量和树高生长量上优势最明显。试验表明容器苗造林可以有效提高造林成活率,下坡造林有利于幼苗更好生长。 相似文献
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对湿地松容器苗与裸根苗造林进行对比试验,结果表明:容器苗造林成活率及当年抽高均高于裸根苗造林;经成本分析,容器苗造林成本每公顷反而比裸根苗造林低4.50元。因而应大力推广与普及松类容器苗造林。 相似文献
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为了探索乡土树种容器苗和裸根苗造林成活率与当年树高生长量,试验选用了华南地区造林绿化常用的香樟、枫香、荷木、红椎、石砾等乡土树种为材料,分别用它们的容器苗和裸根苗造林,并对造林效果进行了对比分析,结果表明:用裸根苗造林,在合适的造林季节,枫香、荷木能够达到理想的造林效果,香樟次之,红椎、石栎最差;在春天雨季造林,木荷、枫香采用裸根苗即可,香樟尽量采用容器苗,红椎、石栎必须使用容器苗. 相似文献
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不同立地条件下红豆树容器苗与裸根苗造林对比试验 总被引:1,自引:0,他引:1
对红豆树(Ormosia hosiei)容器苗与裸根苗在3种不同立地条件下进行成活率、树高和胸径生长量造林对比试验。结果表明:红豆树在不同处理间造林,成活率、6年生幼树高和胸径生长量差异极显著,立地条件与苗木类型间的互作效应在成活率和胸径上呈极显著差异,在树高上无显著性差异;采用容器苗造林成活率、6年生幼树高和胸径生长量极显著大于裸根苗造林;不同立地条件下造林成活率、6年生树高和胸径生长量呈极显著差异,随着立地条件变差,容器苗与裸根苗之间的造林成活率、树高和胸径生长量差距逐渐拉大,对造林成效的影响依次为:胸径成活率树高。 相似文献
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绿洲防护林体系缓解霜冻作用的调查研究 总被引:3,自引:1,他引:2
通过对2004年5月3日晨发生在内蒙古河套平原的大面积霜冻调查显示,绿洲防护林在减轻霜冻方面具有明显作用。由于树体降温放热、林网对气流的阻挡作用以及林冠层对热辐射的影响等,防护林结构较完整的区域冻害明显轻于防护林不够完整的区域;寒流进入林网区后,产生霜冻的能力随纵深距离增大而逐步衰减。加强绿洲防护林体系建设、完善林网结构、重视农田周围闲散荒地的造林绿化对缓减霜冻具有重要意义。 相似文献
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以半年生桢楠(Phoebe zhennan)幼苗为试材,采用正交试验设计,初步研究了容器规格、肥料种类和育苗基质对桢楠容器苗的苗高、地径、根系长、全株鲜重、全株干重影响。结果表明,不同的肥料种类对幼苗的苗高、地径、全株鲜重、全株干重均有显著影响(P<0.05),而容器规格和育苗基质对容器苗的生长无显著影响。对不同因素、不同水平的各个组合处理进行分析,半年生桢楠的容器育苗最佳组合为8 cm×12 cm的容器规格,施用5%有机肥作为基肥,采用80%森林土+20%的火烧土作为育苗基质,其次是10 cm×14 cm的容器规格,施用5%有机肥作为基肥,采用100%森林土的育苗基质。 相似文献
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通过对3年生樟子松容器苗与裸根苗定植后的成活率、保存率、生长量、生产管理和投资费用对比分析,提出了定植容器苗大大优于裸根苗,定植成活率和保存率分别达到96.3%和99%。与裸根苗相比,容器苗造林每667 m2可节约投资764元。特别是在风沙、干旱、瘠薄的榆林沙区,由于风沙侵蚀严重,立地条件低劣,更应提倡并推广使用容器苗... 相似文献
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Seasonal and substrate effects on first-year seedling establishment of major conifer species (Abies mariesii, Abies veitchii, Picea jezoensis var. hondoensis, and Tsuga diversifolia) were assessed in an old-growth subalpine forest in central Japan. Older seedlings (≥1 year) were more abundant on woody debris (WD), such as fallen logs, than on soil. It is known that this preferential seedling establishment on WD is determined by the first-year seedling establishment. The present results indicate that first-summer seedling survivorship clearly contributes to the creation of such seedling–substrate associations, because mortality during the first-summer was greater on soil than WD but that during the first-autumn/winter was not different. Although the standardized mortality rate of current-year seedlings on WD was not so different among the three seasons, that on soil significantly decreased in the winter; indicating that soil is not an unsuitable substrate for seedling survivorship during snow-covered winter. Thus, it can be concluded that biotic and abiotic factors enhancing seedling mortality on soil are most active during summer, and seedling–substrate associations seem to be determined mainly during the first-summer soon after seedling emergence. Furthermore, the first-year survivorship of P. jezoensis var. hondoensis, which has smaller-sized seeds/seedlings that are disadvantageous for early survival, decreased with progressing WD decay toward soil. This suggests that the properties of WD also affect current-year seedling survivorship, especially for species sensitive to substrate properties. In conclusion, initial survivorship affects seedling bank dynamics, and such early dynamics are greatly regulated by the highly heterogeneous substrate availability on forest floors. 相似文献