白花马蹄莲离体快繁技术研究

[目的]建立白花马蹄莲的离体快繁体系。[方法]选取白花马蹄莲球茎和叶片作为试验材料,采用组培法进行繁殖试验。[结果]接种前球茎的消毒时间以8 min为宜,叶片的消毒时间以4～6 min为宜,最佳球茎诱导分化培养基为MS+2.0 mg/L BA+0.1 mg/LNAA,最佳叶片诱导分化培养基为MS+1.0 mg/L BA+0.5 mg/L NAA;在相同的温度、湿度和光照条件下,应选择马蹄莲球茎作为培养材料;最佳增殖培养基为MS+1.0 mg/L BA;最佳生根培养基为MS+0.1 mg/L IBA;最佳移栽基质为珍珠岩∶蛭石∶草炭土∶沙子=2∶2∶4∶1;最佳移栽时期为生根培养后10～15 d。[结论]为白花马蹄莲的组织培养提供了参考依据。     

积雪草的组织培养与快速繁殖试验

以积雪草(Centella asiatica)的春芽作为外植体,以MS培养基为基本培养基,添加不同激素,分别组配成12种愈伤组织诱导培养基和丛芽增殖培养基进行组织培养,然后将诱导的积雪草丛芽切成单株后接入4种生根培养基,研究不同激素配比对愈伤组织的形成、丛芽的增殖及生根的影响.结果表明积雪草春芽在MS+6-BA 1.0 mg/L+NAA 0.20 mg/L+2,4-D 0.5 mg/L培养基上容易诱导愈伤组织,诱导率为86％.丛芽在MS+6-BA 3.0 mg/L+NAA 1.0 mg/L+活性炭0.1 g/L培养基上的成活率为94％,增殖系数为5.9.以MS+6-BA 0.4 mg/L+NAA 0.2 mg/L+活性炭0.1 g/L为培养基较有利于生根培养.     

怀地黄试管苗的快繁体系研究

[目的]建立怀地黄试管苗的快繁体系。[方法]分别进行了NAA、6-BA和KT对茎尖培养以及NAA、6-BA试管苗快速繁殖的试验。[结果]中低浓度的NAA和6-BA可以在一定程度上促进怀地黄试管苗的快速繁殖,而高浓度的NAA和6-BA则会抑制怀地黄试管苗的快速繁殖;优选出的怀地黄试管苗的快速繁殖的最佳培养基为MS+0.002 mg/L NAA+0.2 mg/L 6-BA。[结论]试验优选出了怀地黄试管苗的快速繁殖的最佳培养基,为怀地黄的开发利用提供了理论依据。     

基于数值模拟的山东威海区域风能资源评估

利用MM5和CALMET模式对威海风能分布情况进行数值模拟,分析了威海地区不同季节及模拟时段全年平均风能分布的详细特征,并利用马石泊及双岛湾松林两座测风塔的资料对模拟结果进行了评估。结果表明,威海市风能资源储量丰富,MM5和CALMET数值模式对威海市风能分布有一定模拟能力,但精确程度尚需进一步提高。     

Autumn propagation and seed production technique of water spinach

选用翠玉龙品种,利用早稻收割后或早甘薯等作物收获后的田地推广应用空心菜秋繁制种技术,每667 m2制种产量达125～160 kg。该文介绍空心菜秋繁制种的具体技术。     

不同数量传感器下云杉模拟缺陷材应力波成像规律探讨

以云杉原木圆盘为对象,研究不同面积、不同轮廓形状的空洞缺陷及用不同数量传感器情况时应力波成像技术检测缺陷图像与实际缺陷的关系.结果表明:应力波成像系统可以直观显示木材内部缺陷,其检测精度与空洞等实际缺陷面积和被测木材的截面积比率、使用传感器数量及空洞等缺陷轮廓形状有关;当空洞实际面积与被测木材截而积比从1.6％上升到25.0％时,应力波成像系统显示缺陷图像面积与实际缺陷面积相对误差从22.6％下降到9.7％;成像用传感器数量在6～24个之间时,应力波成像系统均能显示空洞等缺陷的存在,但成像用传感器的数量会影响检测精度;缺陷轮廓形状对应力波成像有一定影响,缺陷面积一定时,狭长形缺陷容易被检出,近圆形缺陷检测相对误差小.     

昙花盆栽技术措施

本文简要介绍了昙花的植物学特征、生态学特性,阐述了昙花的繁殖、移栽、光照、肥水管理、整形修剪、病虫害防治以及花期调控等技术措施,为今后人们盆栽和养护昙花提供技术指导和帮助。     

A review of the challenges and opportunities in estimating above ground forest biomass using tree-level models

Accurate biomass measurements and analyses are critical components in quantifying carbon stocks and sequestration rates, assessing potential impacts due to climate change, locating bio-energy processing plants, and mapping and planning fuel treatments. To this end, biomass equations will remain a key component of future carbon measurements and estimation. As researchers in biomass and carbon estimation, we review the present scenario of aboveground biomass estimation, focusing particularly on estimation using tree-level models and identify some cautionary points that we believe will improve the accuracy of biomass and carbon estimates to meet societal needs. In addition, we discuss the critical challenges in developing or calibrating tree biomass models and opportunities for improved biomass. Some of the opportunities to improve biomass estimate include integration of taper and other attributes and combining different data sources. Biomass estimation is a complex process, when possible, we should make use of already available resources such as wood density and forest inventory databases. Combining different data-sets for model development and using independent data-sets for model verification will offer opportunities to improve biomass estimation. Focus should also be made on belowground biomass estimation to accurately estimate the full forest contribution to carbon sequestration. In addition, we suggest developing comprehensive biomass estimation methods that account for differences in site and stand density and improve forest biomass modeling and validation at a range of spatial scales.     

广玉兰的几种繁殖技术

介绍了广玉兰的嫁接繁殖、种子繁殖和扦插繁殖3种繁殖方法的关键技术,其中,嫁接繁殖是广玉兰繁殖中应用最普遍、嫁接成活率较高的繁殖技术。     

彩叶地被植物栽培试验

在湖南省森林植物园内对26种彩叶地被植物进行了繁殖和栽培试验,对其适应性进行了观察与分析,筛选出了金焰绣线菊、金叶连翘、金叶大花六道木、银姬小腊、金脉连翘、小丑火棘、银边石菖蒲、金心黄菖蒲、金叶苔草、大叶花叶络石、金边阔叶麦冬、花叶凤梨薄荷、花叶锦带花、金叶过路黄、书带草、红脉酸膜、紫叶酢浆草、花叶忍冬、花叶马兰、金山绣线菊等20种适合长沙地区栽培的优良彩叶地被植物。