Crop productivity under differently lopped canopies of multipurpose trees in Central Himalaya, India   总被引：3，自引：1，他引：3  

R.L. Semwal  R.K. Maikhuri  K.S. Rao  K. Singh  K.G. Saxena 《Agroforestry Systems》2002,56(1):57-63

Ficus species are multipurpose trees well known by rural populations in Sahelian and Sudanian zones of Africa. Their uses are well documented but their amenability for vegetative propagation has not been extensively studied. This paper compares the rooting ability of stem and aerial root cuttings from thirteen Ficus species found in West Africa. It highlights the differences between species belonging to the sub-genera Sycomorus and Urostigma. The former show no capacity to propagate from cuttings whereas the latter, with epiphytic development, can be propagated by cuttings, although this capacity varies among species. Thus, F. thonningii, F. leprieurii and F. ovata are easily propagated, while F. platyphylla and F. elasticoides are propagated with difficulty. The rooting capacity also varies depending on the cutting material used. It decreases in the following order: long leafless hardwood cuttings (pole) > nodal cuttings > apical cuttings. Rooting potential increases when the cuttings are harvested towards the end of the dry season(March to May). Aerial root can be used for cuttings in all species of the sub-genus Urostigma. The capacity of root cuttings to regenerate is greatest when cuttings are collected at the beginning of the dry season (November). In this case, wound-induced adventitious roots arise at the basal end of the cutting while de novo buds are developed from the cambium at the distal end. The subsequent morphological development is identical to that of a stem cutting. These results clarify and allow the optimal use of the knowledge and methods developed by the indigenous people of the Sahel and could assist and promote fig tree (Ficus sp.) domestication in the dry tropics.This revised version was published online in November 2005 with corrections to the Cover Date.  相似文献   

Mass propagation method from the cutting of three dipterocarp species     

Chikaya Sakai  Atok Subiakto  Hani Sitti Nuroniah  Naoto Kamata  Koji Nakamura 《Journal of Forest Research》2002,7(2):73-80

We developed a vegetative propagation system for mass-producing three dipterocarps species,Shorea selanica Bl.,Shorea leprosula Mig., andShorea platyclados Sloot. This system uses fog evaporative cooling inside a greenhouse to reduce the leaf-to-air vapor pressure deficit (leaf-to-air VPD) inside the propagator, even under high irradiance conditions. This cooling method has no negative influence on medium conditions such as overwetting. A plastic tent propagator combined with this cooling method was used for vegetative propagation experiments. In mass-production experiments, the annual rooting percentages from the cuttings were low in the first 2 years (1997–1998) due to operational problems of the tent propagator (S. selanica, 48–51%;S. leprosula, 56–59%;S. platyclados: 50–63%). A hard cover propagator improved the rooting percentages in the mass-production experiments in 1999 because it made operations easier (S. selanica, 70%;S. leprosula, 77%;S. platyclados, 77%). This system, which uses a combination of fog evaporative cooling and a hard plastic propagator, should be useful for the mass propagation of these dipterocarp planting stocks. This study was carried out under a joint project of the Ministry of Forestry, Indonesia and Komatsu Ltd. The project was supported by Research Association for Reforestation of Tropical Forest (RETROF) organized by Japanese Forestry Agency.  相似文献   

Effects of leaf area and auxin on rooting and growth of rooted stem cuttings of neem     

M. Kamaluddin  M. Ali 《New Forests》1996,12(1):11-18

Green stem cuttings, obtained from 2-year old managed stockplants, with 30, 50 or 100% leaf area were rooted in a non-mist propagator following treatment with 0, 0.2, 0.4 or 0.8% IBA solution. The rooted cuttings were transferred to polythene pots and grown in a nursery for 12 weeks. Rooting percentages of IBA treated cuttings did not significantly differ from those of control cuttings. Likewise leaf area did not significantly influence the percentage of cuttings that rooted. The effects of leaf area and/or IBA treatment in the propagation unit were manifested on the growth of rooted cuttings in polythene pots. Number of roots increased with the increase in IBA concentration and this response was enhanced by increasing leaf area. Root biomass increased with the increase in leaf area even in the control cuttings. Root development was highly influenced by the leaf area and IBA, and hence the growth of rooted cuttings. Cuttings treated with 0.2 or 0.4% IBA at 100% leaf area yielded the best performing rooted cuttings.  相似文献   

朝仓花椒组织培养快繁试验   总被引：4，自引：0，他引：4  

郭伟珍  林艳  毕君  赵京献  徐振华  王春荣  王超 《林业科技开发》2005,19(5):19-21

以朝仓花椒为试材，研究了其组培快繁技术。试验表明，4～5月份接种外植体易获得无菌苗；初期适宜的增殖培养基为MS＋6-BA1．0mg／L（单位下同）＋IBA0．2＋3．0％蔗糖，继代增殖培养基为MS＋6-BA0．5＋IBA0．1＋3．0％蔗糖，适宜的生根培养基为1／4MS＋NAA0．3＋2．5％蔗糖，移栽最佳基质为蛭石。  相似文献   

臭椿花叶病病原病毒的研究     

姚俊梅  刘仪  周仲铭 《林业科学》1993,(6)

从出现花叶症状的臭椿上分离到一种线条状病毒,经过生物学特性、病毒粒体形态、血清学及超薄切片等方面的研究,确定为马铃薯Y病毒组病毒。  相似文献   

丛生竹的组培快繁技术   总被引：13，自引：1，他引：13  

张光楚  王裕霞  谭源杰  李兴伟 《竹子研究汇刊》2004,23(1):13-20

综合报道了20种丛生竹的组织培养,其中15种得到生根小植株.对幼年竹和成年竹各培养阶段的关键技术分别进行了阐述.针对目前竹子离体快速繁殖工作中出现的问题,作者强调应注意无性系苗的遗传品质和遗传多样性的保护,为了降低苗木成本和避免竹林提早开花,竹子组培技术应和常规育苗技术相结合.  相似文献   

南京百合快速繁殖   总被引：9，自引：0，他引：9  

汪有良 《江苏林业科技》1995,22(1):35-36,43

ＢＡ和ＮＡＡ浓度为０．５×１０－６最适于南京百合鳞片分化小鳞茎；较大的鳞片分化的小鳞茎数量较多；对鳞片作分割处理可显著增加单个鳞片分化小鳞茎的数量。  相似文献   

天水地区猫耳刺引种栽培技术研究     

袁军辉 《甘肃林业科技》2004,29(4):28-31

从猫儿刺的引种采挖、播种繁殖、扦插繁殖、分株繁殖等4个方面进行了猫儿刺引种繁育及栽培技术研究，总结出了一套适合天水地区的猫儿刺引种栽培技术。  相似文献   

杉木干基萌芽能力的遗传变异   总被引：3，自引：1，他引：3       下载免费PDF全文

何贵平  陈益泰  支济伟  封剑文  蔡宏明  张新法 《林业科学研究》1996,9(4):413-417

分析了两片杉木子代林伐桩和杉木无性系采穗圃萌条数量的遗传变异情况。结果表明：杉木子代林伐桩萌条数量在产地间、产地内家系间及组合间均存在极显著差异，并有中等以上遗传力；遗传变异系数在３７％～３９％之间；产地的遗传方差分量与产地内家系间的相近。伐桩萌条数量与基径粗度的关系随伐桩年龄的变化而表现不一；不同砍伐季节伐桩萌条数量也存在较大差异。杉木无性系采穗圃无性系间有效萌条数量存在极显著差异，无性系的萌芽能力有较高的重复力。  相似文献   

迷迭香工厂化育苗技术   总被引：6，自引：0，他引：6  

张华通  林爵平  吴永平  陈日东  林晓萍 《广东林业科技》2002,18(3):6-9

用迷迭香小苗枝条为外植体进行组织培养，用组培苗嫩梢作为插穗进行扦插育苗试验。结果表明：芽增殖以MS＋6BA0.5mg/L NAA0.01mg/L 蔗糖30g/L培养基的增殖率达1.4倍；不定根诱导以1／3MS＋IBA0.5mg/L 蔗糖20g/L的培养基效果好，生根率达100％；以组培苗嫩梢扦插，生根率达98％以上。利用芽增殖培养→生根炼苗培养→移栽上盆→扦插→出圃这一流程生产苗木，成本低、苗木质量优、繁殖速度快，可在生产上推广应用。  相似文献