共查询到19条相似文献,搜索用时 203 毫秒
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侧柏1年生苗在不同程度的干旱胁迫下,根水势、须根外渗液电导率、细胞膜破损率、须根导电能力和造林成活率都发生了变化,经测定和分析,作者认为:苗木根水势、须根外渗液电导率和导电能力在反映苗木质量方面是一致的,能够准确地评价苗。本的生命活力,可以作为评价侧柏苗木质量的生理指标。并认为,应用BLY植物组织活力测定仪测定苗木须根的导电能力,是测定苗木生理活性的简便方法。 相似文献
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造林苗木水分状况与苗木活力关系试验分析 总被引:4,自引:0,他引:4
造林苗木水分状况与苗木活力关系试验分析刘俊义,韩东秀,徐正权,张明峰(黑龙江省南岔林业局)(黑龙江省绥棱林业局)近几年来,针对苗木水分状况影响造林成活率这一问题,对伊春林区主要造林树种落叶松、红松、云杉、樟子松、水曲柳等不同苗龄型树苗(按综合分级均为... 相似文献
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本文通过大兴安岭地区落叶松S1-1苗19个形态指档的PCA分析,确定各指标的重要程度;通过对不同等级苗木的6个生理指标测定,分析生理指标与形态指标的关系;通过不同失水程度苗木水势测定和造林试验,确定苗木活力指标。 相似文献
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贮藏对针叶树苗木活力和苗木生理的影响 总被引:3,自引:1,他引:2
通过对贮藏条件下苗木活力和苗木生理的研究,基本摸清了在低温贮藏条件下,油松、侧柏苗木病原菌感染情况,苗木叶绿素、碳水化合物、水势、RGP、DBB及根系外渗液电导率的变化规律。得出根系渗液电导率是评价苗木因贮藏造成根系烂而推动活力的简便有效指标。研究还发现,苗木休眠可分为生理休眠和强迫休眠,生理休苗木,在进入完全休眠后,需经过一定时期的低温才能打眠,油松是生理休眠苗木,需5℃以下温度35-80天才能 相似文献
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樟子松苗木全封闭造林研究 总被引:2,自引:0,他引:2
樟子松苗木全封闭造林研究邓琢人,刘石丁,孙显苍,马春成(黑龙江省林科所)(扎赉诺尔矿务局林业处)(黑龙江省海林林业局)苗木全封闭造林就是在高活力苗木的基础上,采用新材料、新技术使苗木从苗圃起苗到造林成活这一段时间内,全株处于较好的微环境中,即苗木茎、... 相似文献
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A microbial inoculant, known as effective microorganisms(EM), was applied to determine its efficacy on seed germination and seedling growth in the nursery of Acacia auriculiformis A Cunn. ex Benth. The seedlings were grown in a mixture of sandy soil and cow dung(3:1) and kept in polybags; EM was poured at different concentrations(0.1%, 0.5%, 1%, 2%, 5% and 10%). Seed germination rate and growth parameters of seedlings – shoot and root lengths, fresh and dry weights of shoots and roots, vigor, volume, and quality indices and sturdiness – were measured. The nodulation status influenced by EM was also observed, along with the measurement of pigment contents in leaves. The highest germination rate(72%) was observed in 2% EM solution while the lowest(55%) was found in control treatment. The highest shoot and root lengths(30.6 cm and 31.2 cm respectively) were recorded in 2% EM and were significantly(p 0.05) different from control. Both fresh and dry weights of shoots were maximum(8.66 g and 2.99 g respectively) in 2% EM, whereas both fresh and dry weights of root were maximum(2.56 g and 1.23 g respectively) in 5% EM solution. Although the highest vigor index, volume index, and sturdiness(4450, 628 and 67.5 respectively) were found in 2% EM, the highest quality index(0.455) was found in 5% EM solution. The nodule number was higher at a very low(0.5%) concentration of EM but it normally decreased with the increase of concentration. The contents of chlorophyll a, chlorophyll b, and carotenoid were maximum(43.26 mg?L-1, 13.56 mg?L-1and 17.99 mg?L-1 respectively) in 2% EM. Therefore, low concentration of EM(up to 2%)can be recommended for getting maximum seed germination and seedling development of A. auriculiformis in the nursery. 相似文献
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通过对金沙江干热河谷上段乡土树种川楝1年生苗木进行5种晾晒处理试验,测定不同晾晒处理后根系的相对含水率、相对电导率、根系活力和移植后的成活率,分析探讨川楝苗木水分与苗木活力的关系.结果表明:川楝苗木活力与其苗木水分密切相关,在晾晒的过程中苗木失水使相对含水量下降,相对电导率增加,根系活力下降,最终导致苗木成活率降低和影响幼林生长情况.在川楝造林时,要做好起苗后的苗木保护工作,尤其是根系的保护,这对于维持苗木活力,提高造林成活率和保存率有重要的意义. 相似文献
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QU Zhiwei WANG Xiangfeng LIANG Jun Research Institute of Forest Ecology Environment Protection Chinese Academy of Forestry Beijing P.R.China 《中国林业科技(英文版)》2005,4(4):37-42
When individual trees or large areas of forests are subjected to environmental stresses, such as drought, cold, repeated insect pests and diseases, decline of tree vigor and forests degradation may take place. For forest managements, it is necessary to predict the health conditions of individual trees or forests in both outbreak and nonoutbreak areas. Thus, forest resources can be better protected and risks of environmental stresses can be reduced. Meanwhile, in the field of forest theory rese… 相似文献
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我国苗木培育理论与技术进展 总被引:52,自引:5,他引:52
分别从裸根苗培育技术,容器苗培育技术,无性繁殖苗培育技术,生物制剂在育苗中的应用,稀土在育苗中的应用,苗木质量评价技术,苗木活力保护技术等方面,总结了我国苗木培育理论和生产技术的最新进展. 相似文献
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