镇江市红叶石楠叶部病害及其发生特点

红叶石楠是镇江市主要推广彩叶苗木之一,通过调查发现红叶石楠叶部有轮纹病、炭疽病、灰霉病等3种病害,其中轮纹病每年有3次发病高峰,阻碍了红叶石楠的生长并降低了红叶石楠观赏价值,为红叶石楠主要病害,该病害的发生与苗龄关系密切,与土壤、坡向等立地条件亦有一定的关系。经初步鉴定该病害的病原为小孢拟盘多毛孢。     

红叶石楠扦插育苗技术

红叶石楠是一种优良的美化和绿化苗木。本文通过对红叶石楠扦插苗圃地建设、容器扦插育苗、炼苗、移植以及出圃后的栽培管理等技术环节进行试验,掌握了红叶石楠扦插快繁育苗技术。     

红叶石楠栽培技术

红叶石楠的叶色鲜艳夺目,观赏性佳。这一新兴色叶树种被广泛看好,市场前景广阔,发展潜力巨大。以大量培育红叶石楠为目标,介绍红叶石楠的栽培技术。     

红叶石楠繁育技术研究进展

红叶石楠是蔷薇科石楠属杂交种的统称。由于其具有观赏性强、适应性广、栽培容易等特点,在园林绿化中应用广泛。对红叶石楠的扦插繁殖和组培繁殖的方法与技术要点进行了概述,分析了不同繁育方式的特点,并针对红叶石楠的育苗及应用提出了一些建议。     

红叶石楠山地造林效果分析

为探讨红叶石楠在山地上的栽植效果,2011年在建阳范桥国有林场进行红叶石楠不同坡位、不同施肥处理对比试验。对6年生的红叶石楠试验林调查结果表明:在山地上栽植,红叶石楠平均地径生长量0.9 cm·a~(-1),平均树高生长量48.8 cm·a~(-1),平均冠幅生长量28.4 cm·a~(-1)。不同坡位对红叶石楠的生长有显著影响,地径、树高、冠幅的生长量大小均表现为下坡>中坡>上坡,且下坡与中坡、上坡间均达到显著差异。不同施肥处理红叶石楠的地径、树高、冠幅的生长量大小均表现为施基肥+追肥处理>追肥处理>不施肥处理,且3种处理间差异极显著。说明山地上栽植红叶石楠是可行的。选择山地的下坡位,采用施基肥+追肥的施肥措施可以显著提高红叶石楠的生长量。     

红叶石楠的扦插育苗技术

<正>红叶石楠为常绿灌木或小乔木,是石楠属杂交种的统称。常见的有红罗宾、红唇两个品种,其中红罗宾观赏性更好,它是由石楠与光叶石楠杂交而成。红叶石楠的叶色可随叶片新老程度变化而变化,春秋两季时,新梢和嫩叶火红亮丽,极具观赏价值,在园林绿化美化中极具应用价值。红叶石楠生长速度快,在幼苗期,年生长量可达     

红叶石楠推广应用现状及前景分析

通过查阅相关文献资料,综述了红叶石楠在引种、良种繁育技术、栽培技术方面的研究及推广应用进展;探讨了红叶石楠推广应用中存在的问题及解决措施;并对红叶石楠的推广应用前景进行了分析。     

不同品种的红叶石楠苗木生长差异研究初报

以7个品种的2年生红叶石楠苗木为试验材料,就不同品种的红叶石楠的红叶期、成活率、地径生长和高生长等进行差异化分析,以及生长优势和有无主干性显著特征,筛选出适合本地生长的乔木型红叶石楠品种:罗宾斯和火艳。     

转基因红叶石楠抗冻能力的研究

通过对转基因红叶石楠组培苗不同温度条件下耐受低温试验,得出:0℃冷冻处理条件下转基因红叶石楠及对照均无明显受冻害现象;在-3℃条件下,转基因红叶石楠在冷冻48h后过半数存活,未转基因苗在冷冻48h后全部死亡;在-12℃条件下,转基因红叶石楠在冷冻12h后全部死亡,未转基因苗在冷冻6h后全部死亡;试验证明沙冬青抗寒基因转入红叶石楠中抗寒性获得表达。     

红叶石楠在天津城市绿化中的生长观测调查

通过对在天津地区园林绿化中栽植的红叶石楠的物候期、越冬表现和苗高生长量进行的观测分析,结果表明:红叶石楠在天津3月上旬萌芽,4月末开花,花期15d左右,年周期内有2次生长高峰期。红叶石楠适宜在天津栽植。     

Effects of nutrition spatial heterogeneity on root traits and carbon usage by roots of Cercis chinensis seedlings in split root rooms

In natural ecosystems, nutrition available for plants shows great spatial heterogeneity. Much is known about plant root responses to the spatial heterogeneity of nutrition, but little is known about carbon usage in roots in nutrition-deficient patches and its effect on root longevity. In this study, split-room boxes were used for culture of Cercis chinensis seedlings, and the small rooms were supplied with different nutrition levels. The number of the first-order roots in the rooms with nutrition supply was significantly higher than that in the rooms with deficient nutrition. Specific root length （SRL） of the first-order roots in the rooms with deficient nutrition reached its peak at day 64 after nutrition treatment. There was no significant SRL differences between the two order roots during the experiment. Biomass of the first-order roots in the rooms without nutrition supply was significantly less than that of the first-order roots in the rooms with nutrition supply from day 64 to 96. The total biomass of the lateral roots in the rooms without nutrition supply decreased from day 64 to 96. The activities of the enzymes in roots in the rooms without nutrition supply increased and the activities of alkaline invertases in roots in the two sides of split box did not change significantly. The activities of the enzymes in roots in the rooms without nutrition supply increased gradually. These results suggest that nutrition spatial heterogeneity induced the changes in root traits and plants actively controlled carbon usage in roots in nutrition-deficient patches by regulating the activities of invertases and sucrose synthases, resulting in the reduction in carbon usage in the roots in nutrition-deficient patches.     

Effects of nutrition spatial heterogeneity on root traits and carbon usage by roots of Cercis chinensis seedlings in split root rooms

In natural ecosystems, nutrition available for plants shows great spatial heterogeneity. Much is known about plant root responses to the spatial heterogeneity of nutrition, but little is known about carbon usage in roots in nutrition-deficient patches and its effect on root longevity. In this study, split-room boxes were used for culture of Cercis chinensis seedlings, and the small rooms were supplied with different nutrition levels. The number of the first-order roots in the rooms with nutrition supply was significantly higher than that in the rooms with deficient nutrition. Specific root length (SRL) of the first-order roots in the rooms with deficient nutrition reached its peak at day 64 after nutrition treatment. There was no significant SRL differences between the two order roots during the experiment. Biomass of the first-order roots in the rooms without nutrition supply was significantly less than that of the first-order roots in the rooms with nutrition supply from day 64 to 96. The total biomass of the lateral roots in the rooms without nu-trition supply decreased from day 64 to 96. The activities of the enzymes in roots in the rooms without nutrition supply increased and the activities of alkaline invertases in roots in the two sides of split box did not change significantly. The activities of the enzymes in roots in the rooms without nutrition supply increased gradually. These results suggest that nutrition spatial heterogeneity induced the changes in root traits and plants actively controlled carbon usage in roots in nutrition-deficient patches by regulating the activities of invertases and sucrose synthases, resulting in the reduction in carbon usage in the roots in nutrition-deficient patches.     

余姚地区松幽天牛发生情况及其在枯死马尾松根部分布规律的初步研究

调查了松幽天牛(Asemum amurense)在余姚地区的发生情况及其幼虫在枯死松树根内的分布规律。结果表明,松幽天牛在余姚地区1年发生1代,以幼虫在松树根内越冬。4月中旬开始化蛹,5月中旬成虫开始羽化,6月上旬成虫开始产卵,7月下旬卵开始孵化。松幽天牛在余姚地区的平均危害率达42.9%,其发生与土壤理化性质密切相关。松幽天牛幼虫在主、侧根内的分布数量差异显著,主根内的幼虫数显著多于侧根内。还依据松幽天牛的生活学特性提出了松幽天牛的防治措施     

全国杉木家系区域试验研究

湖南省林科院先后于 1984年春、 1989年春两次参加全国杉木家系区域试验。方差分析表明 :提供家系的种子园之间以及种子园内家系之间各主要数量因子存在显著差异。对样本观测值进行标准化变换主成分分析 ,求出遗传综合指数 ,再聚类分析评价 :湖南靖州、江西赣南、广西柳州、贵州东南、福建三明、广东曲江种子园提供的家系生长有明显优势。     

The status and conservation of whooper swans (Cygnus cygnus) in China

There are five species of swan in the world. Three of them were recorded in China. They are whooper swan (Cygnus cygnus), whistling swan (Cygnus columbianus) and mute swan (Cygnus olor). Among them. whooper swan is the most famous in China. Whooper swan is a resident bird in China. They breed in Xinjiang Ugyur Autonomous Region. Inner Mongol Autonomous Region. Heilongjiang Province. etc., and winter in Qinghai. Shandong. Henan Province, etc, and the lower reaches of the Changjiang River. The total number in China is about 5.000 in breeding grounds and 15.000 in wintering grounds. Higher number were found in 1960s. Because of the changes in environment and hunting, of picking up eggs and of catching nestlings, their population is being reduced rapidly. They are in danger now. In order to protect the whooper swans, some protection measures must be taken, such as strengthening public education and scientific research, estabilshing a base of raising and breeding: developing international cooperation, strengthening the construction of natural reserves in the breeding and wintering grounds. Up to the end of 1993. 34 natural reserves have been established in China. (Responsible Editor: Sun Yueqi)     

香榧细小卷蛾生物学特性及防治研究

香榧细小卷蛾Lepteucosma torreyaeWu et Chen是危害香榧的主要害虫之一,在浙江省绍兴市1 a发生2代,以老熟幼虫在枯枝落叶中做茧越冬,翌年2月中旬化蛹,3月上旬成虫羽化并产卵,3月下旬第1代幼虫孵化,5月中旬化蛹,5月下旬成虫羽化,6月上旬产卵,6月中旬第2代幼虫孵化,11月上旬开始越冬。在第2代幼虫期,使用1.8%阿维菌素乳油、5%抑太保乳油、2%阿维苏云制剂、35%吡虫啉乳油及20%杀灭菊酯乳油等5种药剂10个浓度进行喷雾防治试验,施药9 d后,防治效果均达到100%。     

蜡杨梅砧木嫁接的晚稻杨梅盐碱地栽培试验

用2种不同砧木嫁接晚稻杨梅种植于盐碱地和酸性土壤中,进行杨梅栽培试验.结果表明,两种土壤中的营养元素除速效钾盐碱土高于酸性土外,其它均低于酸性土,但两种土壤上的杨梅叶片元素含量有所不同,大量元素盐碱土稍低于酸性土,而微量元素除Cu相同外其它均高于酸性土;本接杨梅种植在盐碱地上与蜡杨梅作砧木嫁接杨梅生长相比较,本接杨梅树...     

生长环境及收获期对野鸦椿属植物三萜类化合物含量的影响

【目的】研究不同生境和收获时间对圆齿野鸦椿不同部位总三萜类化合物积累的影响情况,为其药用价值和科学栽培的研究奠定基础。【方法】选择3个低海拔地区的8年生圆齿野鸦椿,分别于2014年11月和2015年3月采集其叶片、枝条和果实,选择高海拔地区6年生的野鸦椿和圆齿野鸦椿,于2014年8月分别采其叶片和枝条,对其总三萜类化合物含量进行了测定和比较分析。【结果】1)8月采集的叶片中三萜类化合物的含量,野鸦椿高于圆齿野鸦椿,且其含量差异呈显著性水平;但是,8月采集的枝条中三萜类化合物含量,野鸦椿低于圆齿野鸦椿。2)圆齿野鸦椿不同部位的总三萜类化合物含量存在差异,且2个月份采集的含量高低顺序均为叶片>枝条>果皮>种子,均以叶片中的含量为最高,依次为9.06%(农大)、7.14%(清流)和6.85%(邵武)。3)11月采集的圆齿野鸦椿样品中的三萜类化合物含量高于3月所采样品中的含量,其叶片中的总三萜类化合物含量最多可提高172.91%。4)圆齿野鸦椿叶片、果皮和种子中的三萜类化合物含量与试验地的海拔高度、年降水量均表现出极显著的负相关关系,与年均气温存在极显著的正相关关系,其叶片中的三萜类化合物含量还与年均无霜期呈正相关关系,其枝条中的三萜类化合物含量与各地理和气象因素之间的相关性均不显著。【结论】圆齿野鸦椿的叶片采收期长于野鸦椿;低海拔、较少降水量和年均气温较高有利于圆齿野鸦椿植株对三萜类化合物的累积,这3个因子可以作为圆齿野鸦椿适宜栽培区域的划分指标;夏季采摘野鸦椿叶片,秋冬季采摘圆齿野鸦椿叶片,所采叶片的总三萜类化合物的含量均较高。     

Photosynthetic Characteristics of Ash and Larch in Mixture and Pure stands

IntroductionDuringthepasttwodecades,studieshaverevealedthatgrowingash(Fnainusmandshurica)andlarch(LarlksPP.)togetherinaproperwaycanincreasetheproduc-tivityQfthestandsI"'}'-'].Theyieldimprovementmechanismsattributetotwoaspects,i.e.,theabovegroundandundergr…     

湖南牡丹品种资源的调查

湖南牡丹属我国江南牡丹品种群。明清时期,先后形成湘西北以观赏牡丹为主和湘西南以药用牡丹为主的两个栽培中心。目前,全省约有21个牡丹品种,其中观赏牡丹品种12个,药用牡丹品种9个。湘西北的永顺县保存下来一批十分珍贵的古牡丹,长沙王陵公园建立了湖南首个本土牡丹专类园,为湖南牡丹品种资源的科学保护及开发利用创造了条件。