河北省燕山区板栗害虫调查初报

１９９７￣１９９９年,在河北省燕山板栗产区的遵化、兴隆、迁西等县（市）进行了板栗害虫的调查。经采集、饲养、现场拍照,结合有关资料鉴定、整理,初步确定板栗害虫、害螨共有１２９种,隶属于６个目４６个科。     

李实蜂在河北地区发生特点的研究

１９９８、１９９９年在易县解村要场、西陵林场、中独乐村,对 蜂的发生特点进行了调查和研究。结果表明,李实蜂在河北易县４月初为羽化高蜂,和李树盛花期相吻合;第１代幼虫于５月下旬脱果。不同品种、树膛内外,李实蜂的为害程度有极显著差异;而不同方向不同高度的为害程度则无明显差异;幼虫的空间分布型为随机分布。根据研究结果和李实蜂发生太,提出在全省李树新品种推广区加强监测和治理的原则建议。     

石竹密度效应研究

本文运用石竹产区内３０块固定标准地的调查材料,配制竹林密度效应模型Ｗ＝０．０４１９２３４７Ｎ＾１．２０６８４１Ｄ＾１．８３３９２５复相关指数Ｒ＝０．９６,Ｆ检验值为１４１。偏相关系数Ｒ１＝０．８６,Ｒ２＝０．９８。检验结果达到极显著相关,对该模型进行生产弹性分析,边际产量分析,为调整竹林密度提供科学依据。     

桉树扦插育苗轻基质试验

试验结果表明：在１２种不同配方基质中,各组合基质间的干、湿重达极显著差异,扦插生根率和杯期苗木高生长达显著或极显著差异。以容积比为２：１的炭化木糠＋黄心土基质的平均每扦插杯干重和湿重都最轻,分别为４０．９ｇ和５２．１ｇ;扦插平均生根率最高的为泥炭土＋黄心土基质,生根率最低的为容积比１：１的炭化栲胶渣＋黄心土基质,分别为８５．％和６．７％;从基质改良角度考虑,容积比为２：１：１的木糠＋黄粘土＋黄心土     

几种防腐剂处理尾叶桉,湿地松和马尾松木材的室内促进试验

对马尾松、湿地松和尾叶桉３种木材用Ａ、Ｂ、Ｃ３种防腐剂处理,通过室内促进试验测得各种防腐剂使用量的临界值,结果表明,３种木材的天然耐腐性均属不耐腐或易腐烂等级,经防腐剂处理后,木材的防腐效果较好,且Ａ防腐剂较Ｂ、Ｃ为好。试验结果可为实际处理生产工艺的制定及预测防腐剂的处理效果提供参考。     

柏肤小蠹的生活史及防治

介绍了柏肤小蠹的生物学和生态学特性 ,并针对其发生为害特点 ,提出了监测预报方法和综合治理措施     

伞房属4个树种/亚种在广东乐昌的早期生长表现

分析引自澳大利亚东部的桃金娘科（Myrtaceae）伞房属(Corymbia) 4个树种/亚种在广东省乐昌试验点的早期生长表现,结果表明：10 a生时,4个树种/亚种生长量最大的是大叶斑皮桉（Corymbia henryi）,其次是斑皮柠檬桉（Corymbia citriodora ssp. variegata）、柠檬桉（Corymbia citriodora ssp. citriodora）和斑皮桉（Corymbia maculata）,平均单株材积分别为0067 4、0059 0、0054 1和0034 1 m3;与8 a生时比较,4个树种/亚种在10 a生时仍保持较快的增长速度,材积增长均在67%以上,其中斑皮桉的材积增长率高达1450%。方差分析结果表明：在试验组Ⅰ,柠檬桉和大叶斑皮桉3个生长性状在家系间差异极显著（P＜001）,种源间胸径差异达极显著水平（P＜001）,树高差异达显著水平（P＜005）,单株材积差异不显著;在试验组Ⅱ,斑皮柠檬桉和斑皮桉3个生长性状在种源、家系间差异极显著（P＜001）。以单株材积高于对照为选择目标,选出大叶斑皮桉2个种源2个家系,斑皮柠檬桉5个种源11个家系,共计7个种源13个家系,分别占参试种源和家系总数的389%和140%。     

Inoculation of ectomycorrhizal fungi contributes to the survival of tree seedlings in a copper mine tailing

To advance our understanding of the effects of inoculation with ectomycorrhizal fungi (EMF) on seedling colonization in mine wastelands, we conducted a field experiment in a copper tailing. Six-month-old seedlings of Japanese red pine (Pinus densiflora) and oak (Quercus variabilis) separately inoculated with three EMF species (Pisolithus sp., Cenococcum geophilum, Laccaria laccata) were transplanted to the copper tailing. The survival rates of tree seedlings were monitored monthly, and growth (biomass and height), contents of nutrients and heavy metals (K, P, Ca, Mg, Cu, Zn), and mycorrhizal infection rates of seedlings were determined 6 months after planting. Oak seedlings exhibited higher survival rates than pine seedlings after 6 months of growth on the tailing. EMF inoculations of pine seedlings significantly enhanced their survival, growth, and nutrient uptake. In contrast, EMF inoculations of oak seedlings improved growth only in terms of biomass. Additionally, EMF inoculation caused pine seedlings to accumulate more Cu and Zn in roots compared to non-inoculated seedlings, whereas inoculation inhibited the accumulation of heavy metals in shoots. However, similar results were not observed in oak seedlings. Observations of roots indicated that the rates of mycorrhizal infection of both tree species had dramatically declined at harvest time. In conclusion, ectomycorrhizal symbioses can improve the survival and performance of pine seedlings in mine tailings. The present study provided direct evidence of the importance of EMF inoculation of seedlings to the reforestation of mine wastelands.