乌桕优良无性系评选及可配性研究

对收集的２０个乌桕无性系的生物学特性，主要经济性状进行了观测和比较，经多年测产，评选出８个高产无性系，并进行了可配性试验，用无性系造林，宜选择葡萄桕（类型）混合种植。     

二乔木兰花粉萌发特性及其保存方法的研究

通过使用不同的培养基,采用液体培养法研究了蔗糖、硼酸和钙离子对二乔木兰花粉萌发的影响。将所用花粉分为两组,组1于8:00采集,组2于16:00采集,结果表明:一定浓度的蔗糖、硼酸和钙离子对花粉的萌发有较大的促进作用,但超过一定浓度时则起抑制作用,二乔木兰花粉萌发的最适培养基为30 g·L~-1蔗糖 100mg·L~-1硼酸 500 mg·L~-1Ca~2 ,在该培养基内,组1花粉的萌发率为46．21%±1．86%,花粉管长度为1156．25Um;组2花粉的萌发率仅为14．22%±1．86%,花粉管长度为1022um。此外,在其离体萌发过程中,二乔木兰花粉存在花粉管双萌发的现象。用不同的花粉保存方法保存二乔木兰花粉后,发现干燥处理后于-18℃下保存的花粉活性最高,30d后仍有6．92%±0．75%的萌发率,而于常温25℃下保存的花粉10d后就基本失活,说明低温干燥保存是保存二乔木兰花粉活性的有效途径。     

枣授粉受精及胚胎发育研究

The processes about pollination, fertilization and embryo development of Chinese Date ‘Wu-he-zao‘ (ziziphus jujuba) were observed by means of lightmicrocope combining histochemical dyeing and fluorescent technique. The results were summarized as follows:The pollen grains germinated on the stigma at the 4th hour after pollination. On the 5th day after pollination,the primary endosperm nucleus formed, and the zygote formed on the 6th day. The double fertilization of Wu-he-zao was the type premitotic syngamy. The first division of the zygote took place after a dormancy for about 6 - 7 days. The proembryonal development of Wu-he-zao belonged to the Solanad type. The development of the endosperm belonged to the nuclear type.     

Cutting technic forPinus elliottii plantation of the multi-benefit management pattern

The cutting technic for thePinus elliottii plantation of the multi-benefit management pattern in the hilly region of Jiangxi Province was studied by establishing the model of growth progress according to Richards function and simulating the tending cutting on computer by use of dynamic programming. The results showed that the best time for the initial thinning was at tree age of 8–10 and final cutting was at tree age of 25. The optimal thinning project was 3 times of thinning cutting including the first thinning, and the thinning time was at tree ages of 8, 12 and 16, respectively. Their thinning intensities were separately 950, 700 and 300 trunks per hectare, and the preserved density was 550 trunks per hectare until the final cutting Foundation item: This study was supported by Natural Science Foundation of Jiangxi Province (A grant 0330023) Biography: WANG Qing-chun (1970-), male, Ph. Doctor, Senior Engineer in Academy of Forest Inventory & Planning, Jiangxi, Nanchang 330046, P.R. China. Responsible editor: Song Funan     

长山列岛猛禽的环志研究

长山列岛,为环太平洋西岸、东北亚、东亚等地区候鸟迁徙的必经之路,有候鸟319种,特别是猛禽的种类多数量大,有2目、4科41种和亚种。1984年,国家在这里建立“山东省长岛候鸟保护环志中心站”,开始了侯鸟的环志研究,到2005年累计环志候鸟128种,近17.7万多只,其中猛禽22种,近6万只,已在国内、国外回收环志猛禽169只。进行了部分猛禽迁徙生态生物学研究,初步掌握了猛禽在长山列岛的迁徙规律。     

蒙特卡罗在项目融资风险评估中的应用

项目融资具有强大的筹资能力，在我国的应用具有广阔的前景。但项目融资也存在巨大的风险，需要对风险加以管理．风险评估是风险管理的重要步骤。本文通过介绍蒙特卡罗的基木概念、基本原理和工作程序，采用蒙特卡罗模拟与Matlab程序相结合的方法进行了项目融资风险定量评估，并结合实例对此方法予以说明。     

营林技术决策系统的研究与开发

A set of forestation decision-making system which covers 140 tree species growing extensively in Zhejiang Province including coniferous forest, broad-leaf forest, production forest, and bamboo forest, was developed by cooperation of silvicultural techniques and computer programming based on the experience of forestry management and mathematical models. It can be easily operated to help user selecting tree species in given site types and optimize their benefits, which advances the efficiency of forestation and improves the rationality of decision-making.     

沙棘籽的综合利用Ⅰ——沙棘籽油渣的化学成分研究

以甘肃省漳县产沙棘籽提油后的渣为原料对其所含化学成分进行了研究。实验结果表明，油渣中含有十多类化学成分，特别是含有丰富的蛋白质、糖类、可食纤维素、钾、镁、铬、硒和锰等人体必需的营养成分。说明沙棘籽中的大部分生物活性物质在提油之后仍遗留在油渣中。为了提高沙棘资源的利用率、增加沙棘籽的附加值，必须进一步深入研究沙棘籽油渣的化学成分及其提取工艺，开发这些成分的新用途，对沙棘籽实行综合利用。     

四川乡土和引进丛生竹的生长表现及竹丛营养空间拓展分析

围绕四川竹业资源培植需求,对8个丛生竹竹(品)种引种栽培3 a的生长性状变化和适应性进行分析.从立竹胸高断面积、竹丛篼幅及冠幅的变异系数变化,探讨了竹丛生长的营养空间拓展及其立地适应性表现.结果表明,丛生竹造林3 a的生长增殖已正常地表现出丛生竹无性系种群增长及结构动态,竹林已具备资源生态经济价值.