速生杉木为基材的水曲柳薄木贴面初步研究

以速生杉木为基材，水曲柳薄木为贴面材料，用脲醛树脂粘剂（UF）和聚醋酸乙烯醋乳液胶（PVAc）按一定比例混合后作为胶粘剂，热压贴面胶合，对温度和时间与巾面效果的关系进行了研究。结果表明：①用UF与PVAC比例混合的胶粘剂，在生杉木上进行水曲柳薄木贴面是可行的；②热压温度和时间对贴面效果的影响都是极显著的，并得到了一种较理想的薄木贴面热压工艺。     

核桃楸枝条,插穗中生根抑制物质的含量

通过红心萝卜种子发芽试验表明核桃楸母树体内存在着生根抑制物质．枝皮内的生根抑制物质含量随母树年龄的增加而提高；生根抑制物质含量在高生长旺盛期枝皮内最低，在休眠期含量最高；平茬具有较强的生理复幼作用，根萌枝条皮内的生根抑制物质含量较低；插穗在扦插过程中皮内生根抑制物质含量逐渐降低．     

Study on the Provenancc of Fraxinus Mandshurica

INTROD[JCTloNljaxli7ilsma,7'l\hllrlcaisapril11aryaccol11pan}'il1gsPCciesofthctop-gradcpopuIationofthcbroadIcafforcstinnortI1castChina.Itdistributcd\"idcl\intl1carcasofsccondary'forcst.ltispossiblctl1attl1cpro\'cnal1ccsx`-itl1diffcrcntgcl1cticstructurclla\…     

白蜡实生苗培育技术

为了克服水曲柳播种苗适应性差,生长缓慢的缺点,本文对水曲柳的砧木白蜡的播种育苗技术从种实采集、种实处理、圃地选择与整地、播种育苗和幼苗的抚育管理等五个方面进行了试验研究,总结了一套白蜡培育壮苗的新技术。     

核桃楸树皮的没食子酸、鞣花酸及水解单宁成分研究

研究了核桃楸树皮丙酮-水提取物的水溶性萃取部位的化学成分.采用Sephadex LH-20柱色谱及薄层色谱等方法进行分离,经波谱分析及理化性质测定,鉴定了6个化合物:没食子酸(1)、鞣花酸(2)、1,2,6-三没食子酰葡萄糖(3)、1,3,6-三没食子酰葡萄糖(4)、1,2,4,6-四没食子酰葡萄糖(5)及1,2,3,4,6-五没食子酰葡萄糖(6).化合物2、4、6为首次从该植物中分得.     

Die Esche(Fraxinus excelsior L.) — ein Baum des Leipziger Auwaldes?

Zusammenfassung Die historische Analyse der Waldentwicklung des Leipziger Auwaldes ergab, da?Fraxinus excelsior bis Mitte des 19. Jahrhunderts nicht in der Baumschicht vorkam. Ihre Einbringung erfolgte durch forstliche Ma?nahmen beginnend am Ende des 18. Jahrhunderts und wurde ab 1870 verst?rkt. Heute ist die Esche die h?ufigste Baumart im Leipziger Auwald. Weitere Beispiele zeigen, da? der Eschenanbau keine lokale Erscheinung darstellt, sondern auch in anderen europ?ischen Gebieten zur gleichen Zeit erfolgte.      

水曲柳性状相关选优方法的探讨

根据30株天然水曲柳解析木资料，运用相关分析原理，对其胸径、树龄、树高之间关系进行了探讨，并利用其回归方程，编制了天然水曲柳胸径、树龄、树高相关表，为石沉大海 曲柳选优找到了简便可靠的方法。     

对节白蜡幼苗移栽育苗试验初报

大田播种不易管理，往往因种子还未发芽，苗田就长满杂草并与种子争水、争阳光，造成种子不易发芽，种子甚至发霉、变质、腐烂。而采取砂床播种，便于管理，发芽率高，出土整齐。     

不同光环境下水曲柳幼树光合指标的生理反应

应用Li-640002B型光合仪对生长在不同光环境下的水曲柳幼树的光合特性进行了测定。统计分析结果表明,幼树对低光环境具有较强的适应能力,能够在0.512μmol·m-2·s-1的条件下正常生活。幼树光合速率最高可达13.0μmol·m-2·s-1,光饱和点(LSP)1000μmol·m-2·s-1左右,适生光环境为800～1000μmol·m-2·s-1。     

Acorn dispersal and predation patterns of four tree species by wood mice in abandoned cut-over land

We compared patterns of acorn dispersal and predation by wood mice among four tree species (Quercus serrata, Quercus crispula, Castanea crenata, and Juglans mandshurica var. sieboldiana) that are abundant in cool temperate woodlands. We devised an acorn dispersal experiment using 400 magnet-inserted acorns and a magnetic locator in a 1.8-ha study plot, which spanned a cut-over area and an adjacent deciduous forest. Ten wire mesh baskets, each containing 40 acorns (10 acorns per species), were placed on the border between these two habitat types. About 13.0% (n = 52) of the total acorns remained in the baskets, while 77.3% (n = 309) were dispersed throughout the study plot and subsequently retrieved using the magnetic locator. Microhabitat, distance, and burial depth of transported acorns were significantly different among species. In the cut-over area, J. mandshurica var. sieboldiana acorns were dispersed under fallen trees or branches and near stumps, and were buried deeply in the soil. Dispersal distances of J. mandshurica var. sieboldiana acorns were significantly greater than those of Q. serrata acorns. The number and microhabitat of transported acorns significantly differed between habitat types. J. mandshurica var. sieboldiana acorns were dispersed in the cut-over area rather than in the forest. For all four species, the numbers of acorns delivered to fallen trees or branches, stumps, and crumbled soil with overhang under any vegetation type were greater in the cut-over area than in the forest.