共查询到20条相似文献，搜索用时 234 毫秒
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根据“2001—2015年林业生态建设规划和建设宜居生态、和谐富裕巴彦淖尔”的奋斗目标，巴彦淖尔市提出了今后林业建设的“三五”发展（用五年时间，抓好五大工程建设，以五项措施做保障）思路，在五项保障措施中科技支撑是其中一项重要内容；明确了每年完成林业建设面积不低于100万亩，林业产值每年增加1亿元的奋斗目标。完成上述建设目标和任务，需要进一步加快造林绿化进程，不断增加森林资源总量。 相似文献
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林冠的结构和光的分布——光的吸收理论的探讨 总被引：1，自引：0，他引：1
本文提出了短波辐射通过林冠层时的吸收理论。讨论中将叶层结构分为水平叶层、垂直向光叶层、特殊交角叶层和随机分布叶层等四种情况来考虑,分别推导出被林冠吸收的直射和散射光强的数学模式。 相似文献
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神秘的地下的原始森林老诚在黑龙江省乐南部的张广才岭中，有一个闻名遐尔的旅游胜地——地下原始森林。大约在１万年以前，张广岭中发生火山爆发，堵塞了河道，不但为人类留下了美丽的镜泊湖，同时，在这里形成了内壁深壑陡峭的大小不等、形状奇异的１０个火山口。它们呈... 相似文献
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根据中苏两国政府的协定,中苏科学家对黑龙江流域生产力的共同考察工作已是第二年了。由各种专业的科学家们亲手来完成的伟大事业,有利于苏联远东和中国东北地区社会主义经济的发展。在考察计划中,森林学问题佔有很重要的地位。按照森林植物条件及树种组成来说,苏联远东的森林和中国东北的森林似乎是一个林区,这就便于我们选择研究这块森林资源的方法及其开发技术。 相似文献
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区域的持续发展和林业的相关研究的评述杨学军（南京林业大学２１００３７）关键词：持续发展，系统研究，区域经济，林业景观，生态系统１区域的持续发展与林业的作用１．１区域及其持续发展的战略目标区域是一定地域范畴中各种自然生态要素、社会要素、经济要素综合作用... 相似文献
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邹幸福 《中南林业科技大学学报(自然科学版)》1990,(2)
本文对两个具有时滞的生物数学模型进行了研究。结果表明:当时滞大到一定程度时,模型的任何非常数解,都绕其平衡状态振荡。从而揭示了具时滞的模型的解与不具时滞的模型的解之间的本质差别。也较好地解释了传统生态学观点不能解释的有关实验结果。将时滞看作为生物种群数量振荡的内在原因,这是对有关传统观点的更新和补充。 相似文献
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正黄柏山,一座连接鄂豫皖三省的大山。群山巍峨,烟波浩渺,垒垒岩石,纤纤翠草。这条大别山腰间的绿色丝带就像千里大平原惊艳而凝重的舞台,内敛而壮阔的山川画卷,吸引着一批又一批崇尚绿色的人群。造访黄柏山,它的博大震撼了我。高山不朽,水润万物,作为长江和淮河的分水岭,淮河的发源地,黄柏山用一颗清澈如水的心滋养着四季不凋的广袤森林,那些古树遮天蔽日透着古朴清新的气息。沿着略加整饬的林中小路走入密林深处,踏着厚实的苔藓,感觉泥土的潮气和植物 相似文献
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Leaves of fine Populus tomentosa genotype TC152 were used as explants to establish cell suspension lines. The effects of plant growth regulators on callus induction and establishment of cell suspension lines were studied. The callus induction rate was the highest on a MS solid medium supplemented with 1.0 mg·L-1 2,4-D. A cell suspension line could be obtained by inoculating calli which were not subcultured into a MS liquid medium supplemented with 1.5 mg·L-1 2,4-D. The best subculture medium was MS + 0.8 mg... 相似文献
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采用油茶上胚轴、下胚轴和子叶作外植体进行油茶组织离体培养诱导愈伤组织发生和不定芽分化的实验.实验结果表明,0.2％的HgCl2消毒处理油茶种胚外植体10 min效果较好;油茶上胚轴、下胚轴和子叶组织在MS+2,4-D2mg/L+KT0.5 mg/L的培养基上,愈伤组织诱导率分别为95.0％、66.7％和30.0％;在MS+6- BA2.5 mg/L+ KT0.1 mg/L+ NAA0.5 mg/L培养基上,不定芽诱导率分别是66.7％、33.3％和11.1％;以MS+6- BA 2 mg/L+ NAA 0.2 mg/L继代培养,上胚轴、下胚轴和子叶所形成愈伤组织芽增殖系数40天时为5.8、5.6和5.3. 相似文献
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Leaves of fine Populus tomentosa genotype TC152 were used as explants to establish cell suspension lines. The effects of plant growth regulators on callus induction and establishment of cell suspension lines were studied. The callus induction rate was the highest on a MS solid medium supplemented with 1.0 mg·L^-1 2,4-D. A cell suspension line could be obtained by inoculating calli which were not subcultured into a MS liquid medium supplemented with 1.5 mg·L^-1 2,4-D. The best subculture medium was MS ＋ 0.8 mg＇L-1 2,4-D ＋ 30 g·L^-1 sucrose with a subculture cycle of seven days. 相似文献
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以巴西香蕉品种的薄切片为外植体高频地诱导出愈伤组织,并诱导出了不定芽,获得了再生植株。在实验过程中,利用正交实验中筛选出愈伤组织诱导的最佳培养基为MS+2,4-D 4.0 mg.L-1+KT 1.0 mg.L-1+NAA 1.0 mg.L-1+活性炭200 mg.L-1,诱导率可达100%,愈伤组织增殖的最佳培养基是MS+2,4-D 2.0 mg.L-1+6-BA 0.5 mg.L-1+NAA 0.5 mg.L-1+活性炭100 mg.L-1,继代3-4次的愈伤组织在6-BA浓度为5.0 mg.L-1的分化培养基上能分化出不定芽,继代10次之后愈伤组织在继代培养基上开始出现褐化现象,愈伤组织增殖明显受到抑制,褐化的愈伤组织逐渐死亡。 相似文献
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巨龙竹种子、小穗外植体愈伤组织的诱导培养 总被引：5，自引：0，他引：5
通过对巨龙竹种子和小穗两种外植体愈伤组织初导培养基和增生培养基的筛选及防褐化处理试验,结果表明,巨龙竹种子和小穗初导培养基最优组合为3/4 MS 3 mg/L 2,4-D 0.3 mg/L KT 25 g/L,MS 3 mg/L2,4-D 0.3 mg/L KT 25 g/L;其种子和小穗的增生培养基最优组合分别为MS (3~5 mg/L)2,4-D 0.3mg/L KT、MS 3 mg/L 2,4-D 0.3 mg/L KT;在特定培养条件下,对褐变有一定程度的控制。 相似文献
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In vitro flowering of green and albino Dendrocalamus latiflorus 总被引：1，自引：0，他引：1
To propagate Dendrocalamus latiflorus, we used in vivo inflorescences to produce calli on Murashige and Skoog basal (MS) medium supplemented with 3 mg/l 2,4-dichlorophenoxyacetic
acid (2,4-D), 2 mg/l kinetin, 250 mg/l polyvinyl pyrrolidone (PVP), and 1% coconut milk. Multiple shoots were generated on
MS medium supplemented with 0.1 mg/l thidiazuron (TDZ). The green plantlets were successfully transferred to soil. Multiple
albino shoots also regenerated and were able to proliferate on medium containing cytokinins, especially TDZ. Albino multiple
shoots rooted in medium containing α-naphthaleneacetic acid (NAA), and callus formation was observed in the presence of 2,4-D
and picloram. Green and albino regenerates flowered after 8 months of subculture. The flowering ratio increased to 44% after
three treatments in medium containing 1 mg/l TDZ. Morphological observations revealed that the in vitro green and albino flower
organs were normal. However, pollen derived from the in vitro flowers of both the green and albino plants were sterile. 相似文献
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邓恩桉种子组织培养的研究 总被引：3，自引：0，他引：3
宋建英 《中南林业科技大学学报(自然科学版)》2008,28(6)
以邓恩桉种子为外植体,探讨用最少种子快速繁殖最多幼苗的方法,结果表明:MS培养基是较适合邓恩桉种子萌芽和生长的基本培养基;诱导种子直接脱分化成愈伤组织的较佳培养基配方为MS KT1.0 mg/L 2,4-D2.0 mg/L 半胱氨酸30 mg/L;以邓恩桉实生苗的芽来繁芽的较理想培养基配方为H BA2.0 mg/L IAA0.2 mg/L;邓恩桉实生苗的根诱导愈伤组织的较佳培养基配方为MS 6-BA2.0 mg/L NAA0.2 mg/L;诱导邓恩桉下胚轴分化芽较佳培养基配方为B5 6-BA2.0 mg/L 2,4-D0.2 mg/L;诱导邓恩桉下胚轴脱分化为胚性愈伤组织的较佳培养基配方为B5 Ad2.0 mg/L IAA0.2 mg/L. 相似文献
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Toru Taniguchi Kazuo Tabuchi Kazuho Yamaguchi Yoshitake Fujisawa 《Journal of Forest Research》1996,1(1):51-55
Somatic embryos ofAcanthopanax sciadophylloides Franch. et Sav. were differentiated from both zygotic and somatic embryos and calli, and plants were regenerated from these
somatic embryos. A zygotic embryo, enclosed within a small portion of the endosperm, was incubated on Murashige and Skoog
(MS) media supplemented with various combinations (range 0–10.0 mg/l) of 6-benzylaminopurine (BAP) and 2,4-dichlorophenoxyacetic acid (2,4-D). After 4 months, swelling of the zygotic embryos
and callus formation was observed. When the swollen embryos were transferred to MS medium supplemented with 0.5 mg/l of 2,4-D, somatic embryos were formed in one to two months. After subculture on the same medium, new embryos were differentiated
from various parts of the older somatic embryos. The calli were cultured on medium supplemented with 2.0 mg/l of 2,4-D and BAP for three weeks. Proliferated calli were transferred to medium supplemented with 1.0 mg/l of 2,4-D and BAP. Somatic embryos were differentiated from the calli within one to two months. Somatic embryos were germinated
on half-strength MS medium without plant growth regulators and the plantlets were grown in soil.
A part of this paper was presented at the 106th Annual Meeting of the Japanese Forestry Society (1995) & First Asia-Pacific
Symposium on Forest Tree Genetic Improvement (Beijing). 相似文献
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将虎杖P olygonum cusp id a tum不同外植体经不同消毒时间处理后,接种在添加不同激素种类和水平的相同基本培养基上或相同激素种类和水平基本培养基上进行诱导实验,同时对根和根茎芽、叶、韧皮诱导的愈伤组织进行白藜芦醇含量的测定.结果表明:基本培养基以M S较好,外植体叶对激素种类较为敏感,其中适当浓度的NAA诱导愈伤组织比2,4-D的效果好,KT比BA好,添加KT的培养基上诱导愈伤组织比较紧密,有利于分化,在M S+NAA 2 m g/L+KT 0.1 m g/L培养基上诱导愈伤组织较好,根茎芽的诱导率最高,为73%;愈伤组织的生长趋势从接种的第3天开始生长,到21 d时生长达到最高峰,干质量为0.461 2 g,以后生长速度减慢;对不同材料诱导的愈伤组织进行白藜芦醇含量的测定,其中根茎部芽的诱导的愈伤组织中白藜芦醇含量最高,其次是叶和根,最低的为韧皮. 相似文献