紫叶矮樱不同基质育苗比较试验

以炉渣、锯末、菇渣废料、鸡粪、羊粪、田园土分别按照不同体积比配制9种供试基质,对紫叶矮樱进行处理,研究不同基质养分对紫叶矮樱苗木株高及成品苗质量的影响.结果表明:G6基质(田园土∶炉渣∶菇渣废料∶鸡粪=6∶3∶0.5∶0.5)为最佳栽培基质.     

落叶松采穗圃的建立与经营技术的研究

落叶松采穗圃的建立与经营技术的研究黄宗文，林殿国，王振明（黑龙江省林科所）（黑龙江省森林经营研究所）（伊春市汤旺河区中心苗圃）落叶松是黑龙江省重要的针叶用材树种之一，年人工更新面积极大，但其种子产量不足，质量低下的问题一直是人们所关注的。，近年来，落...     

利用碳14研究杉木苗根系分泌物

对１年生杉木苗进行二氧化碳１４喂饲，同时收集苗木根系分泌的有机物质，用液闪技术进行测定。结果表明：杉木苗的光合产物在标记１ｄ后就有１．０６％运输入根部组织中，３ｄ后则为４．９０％；２０ｄ近达到２４．０４％。二氧化碳１４喂饲一结束根系就有碳１４分泌物产生；３－５ｄ后分泌量达到最高峰，以后逐渐减少。对分泌物进行分离测定表明，其中糖类占３９．５３％，有机酸占１３．８０，氨基酸占５．４５％。     

种苗生产管理及苗圃抗旱技术研究

我国是个地广物博国家,不同地区气候变化较大,不过随着气候环境不断变化,很多地方雨量较少,经常会出现旱灾情况,加强植树造林,绿化我们生活环境是很有必要的,而旱灾情况对苗木生长是极为不利的,本文就种苗生产管理与苗圃的抗旱技术进行了简单分析研究.     

Modern Nursery Practices in the Production of Quality Seedlings of Indian Sandalwood (Santalum album L.)— Stage of Host Requirement and Screening of Primary Host Species

Abstract

Fewer than one tenth of tropical forests are being managed on a sustainable basis. Sustainable forest management means managing the forest in such a way as to not irreversibly reduce the potential of that forest to produce all products in subsequent harvests. The United Nations Conference on Environment and Development in Rio resulted in several decisions that are relevant to the future of forestry. The Conference also focused world attention on questions of the environment. One outcome of this increased awareness has been the growing support for eco-labelling, which may provide an opportunity for those countries able to prove their forest products are harvested sustainably. Other economic opportunities present themselves in the utilization for cellulose of tree crops such as rubberwood and oil palm trunks and fronds. Non-wood resources such as rattan also hold promise if we are able to grow them in conjunction with existing tree crops. The roles of tropical forests as carbon sinks require more in-depth study as does the question of what constitutes critical levels of biodiversity. Aesthetic values such as recreational use increasingly require that sufficient buffer zones of unique features be preserved. These challenges demand that the forestry profession becomes more proactive and support major policy changes to address the need for sustainable forest management.     

生长调节剂对落叶松杂种生根和幼苗生长的影响

该文利用方差分析及多重比较的方法研究了不同生长调节剂、处理浓度对不同日本落叶松×长白落叶松杂交组合半木质化插穗生根能力及扦插幼苗生长的影响,并选配出了有利于提高插穗生根能力的最佳生根促进剂配方. 研究表明:参试杂交组合间生根能力差异不显著,生长调节剂处理与杂交组合的交互作用也不明显; 适宜的生长调节剂处理对促进落叶松杂种插穗生根有一定作用,尤其对促进根系发育、增加生根量和降低偏根率的作用十分显著;虽然不同浓度IBA处理（100～300 mg/L）对苗期生长的影响未达显著水平,但经处理的生根插穗大田移栽成活率、苗高和地径均高于对照;较高浓度IBA处理（400 mg/L）和生长调节剂配合处理对落叶松杂种半木质化插穗生根率、平均生根量和偏根率有明显的改善作用,其中添加少量维生素的L4配方插穗生根率高达93%,每穗平均生根量多达9.4条,偏根率下降到4.5%.      

Nitrogen Fixation as a Stress-Avoidance Strategy Among Actinorhizal (Non-Legume) Trees and Shrubs

Summary

Actinorhizal species of trees and shrubs are a diverse group of plants that may survive in poor soils by virtue of their associations with the actinomycete Frankia. These species include several important woody plants that are well suited for horticultural use in temperate climates. The symbiosis between Frankia and actinorhizal species shows some similarity to symbioses between rhizobia and woody legumes, and a common ancestor has been proposed for the predisposition to root-nodule symbiosis. Despite their probable common origin, important differences exist between actinorhizal and leguminous symbioses; characteristics of the microsymbiont, nodule architecture, and mechanisms controlling oxygen relations of the nodule are among the ways the two systems differ. If nitrogen fixation is sustained under unfavorable conditions, woody plants that associate with nitrogen-fixing organisms may show enhanced tolerance of environmental stress; species of plants capable of nitrogen-fixing symbioses are known to have comparatively strong resistance to invasion by pathogens. Expansion of the capacity to form nitrogen-fixing symbioses to novel species is a goal of those concerned with the economic and ecological impact of chemical fertilizers. Small in-roads have been made in this regard, but much remains to be discovered about introducing nitrogen fixation to additional species. Herein we review biological aspects of actinorhizal symbioses; consider the horticultural potential of temperate, woody species that form these symbioses; and discuss how nitrogen-fixing symbiosis may impact the stress resistance and use of actinorhizal species as horticultural crops.     

塑料大棚苗床电热恒温系统的研究

本文介绍了组成塑料大棚苗床电热恒温系统的概况,恒温自控原理及特点,同时分析了运行中存在问题,提出了解决办法。为冬季扦插育苗提供了一个简单、实用、安全、可靠的电热恒温系统。     

乙氧氟草醚、乙草胺和盖草能在苗圃中的应用

为了探讨乙氧氟草醚、乙草胺和盖草能在森林苗圃中的应用效果,进行马尾松Pinusmassoniana、火力楠Micheliamacclurei和乳源木莲Manglietiayuyuanensis苗圃化学除草正交试验。试验结果表明,乙氧氟草醚和乙草胺在苗圃播种后芽前期使用和苗期使用乙氧氟草醚、乙草胺和盖草能除草率达90%以上,持效期45～63d,同时对种子发芽出苗和苗木生长安全。采用20%乙氧氟草醚、90%乙草胺和10 8%盖草能,使用剂量为0 105mL·m-2进行化学除草,比人工除草减少除草用工59 1%～66 7%,降低除草成本46 8%～62 9%。表3参4     

贵州省凯里山区马尾松繁育栽培技术管理初探

作为重要的用材、荒山造林的先锋树种的马尾松,在凯里林业资源生态发展中成了自然风景区和普遍绿化及造林的重要树种。文章结合当地的地理条件着重介绍了怎样有技术性的管理马尾松。