油松、辽东栎混交林中生化他感作用的研究

研究了油松（ＰｉｎｕｓｔａｂｕｌａｅｆｏｒｍｉｓＣａｒｒ．）、辽东栎（ＱｕｅｒｃｕｓｌｉａｏｔｕｎｇｅｎｓｉｓＫｏｉｄｚ．）混交林中的生化他感作用，结果表明：油松、辽东栎纯林及松栎混交林下的枯落叶、半分解枯落叶及表层土壤水浸液对油松及其它植物的种子发芽和幼苗胚根、幼茎生长有显著的影响，一般在高浓度下表现为强烈的抑制作用，低浓度下作用不显著或起促进作用。其中辽东栎枯落叶水浸液的抑制作用最为强烈，混交林中枯落叶的抑制作用有所下降。说明在某些条件（干旱、混交比例和混交方式不当）下，两树种混交可引起林地生化他感物质富积，从而导致油松生长不良，林地生产力下降。解释了实际林地的现象，为营造松栎混交林提供了依据。     

许昌市城区立体绿化现状调查及发展建议

立体绿化是拓展城市绿化空间的有效途径。通过对许昌市建筑物外墙植绿、廊架绿化、护坡绿化、屋顶绿化等不同立体绿化形式的调查,发现许昌市建成区立体绿化存在植物种类少、实施立体绿化区域少、管理水平参齐不齐等问题。针对问题,从加强立体绿化植物研究,对立体绿化进行合理规划与引导,强化管理、提升景观效果、加强宣传、提升公众认知度、先易后难及逐步推广等方面提出了发展建议。     

‘豫杂一号’泡桐叶绿体基因组序列及特征分析

泡桐是中国重要的速生树种,对我国经济发展有着重要作用。以‘豫杂一号’泡桐为材料,IlluminaHiseq2000测序,对其全基因组序列基本结构特征、密码子偏好性和重复序列进行统计分析。结果表明,‘豫杂一号’泡桐为典型的四分体结构,全长序列为154615bp,编码114个基因,含4个rRNA,30个tRNA和80个蛋白质编码基因。该叶绿体全基因组测序的成功促进了叶绿体分子生物学的研究,也为泡桐以及其他物种的遗传育种和创制种质资源奠定了一定的理论基础。     

In vitro suppression of quercetin on hypertrophy and extracellular matrix accumulation in rat glomerular mesangial cells cultured by high glucose

Quercetin's protective effects on the glomerulosclerosis of diabetic nephropathy (DN) in rat mesangial cells were investigated. The cell cycles, type IV collagen and laminin, TGF-β₁ mRNA, Smad 2/3 and Smad 7, and activities of cell antioxidases were measured. Compared with the high glucose group, quercetin may decrease the cell percentages of G₀/G₁ phase, Smad 2/3 expression, laminin and type IV collagen, and TGF-β₁ mRNA level significantly. The antioxidant capacity, the cell percentages of S phase and Smad 7 expression was significantly increased by quercetin. These results suggest that quercetin is a protective agent against glomerulosclerosis in DN.     

太阳能路灯控制硬件电路设计

为实现太阳能路灯的智能开关控制、自动充放电、节能调光以及保护蓄电池等功能,设计了电源供电模块、AD采集模块、充放电控制模块、串口通信模块4个系统模块,并将系统设计成负系统,以保证系统稳定可靠的工作。     

竹文化景观表现形式研究

从园林建筑、园林楹联匾额、园林造景、园林雕塑和景观小品、园林设施5个方面探讨竹文化景观的表现形式,提出通过竹文化景观创建达到多样的园林景观效果,进而促进公园文化创意产业发展的建议。     

Factors affecting forest growth and possible effects of climate change in the Taihang Mountains, northern China

To estimate the possible effects of site factors and climatechange on forest growth in the Taihang Mountains, northern China,we assessed the factors influencing forest growth by using forestinventory data from 712 forest sample plots. Meteorologicaldata from 77 meteorological stations in the region were usedto estimate temperature and precipitation at each site fromelevation and longitude. Analyses showed that temperature, aspect,precipitation and soil thickness all significantly influencedforest growing stock (FGS), i.e. stem volume. When temperaturerose, FGS was reduced, possibly because increasing temperatureincreased evapotranspiration. Precipitation had a positive effecton FGS. The effect of aspect on FGS was perfectly expressedas a cosine function, with south-west- and south-facing slopeshaving the lowest FGS and north-facing slopes having the highest.We developed multifactorial regression models to predict changesin FGS in the Taihang Mountains. Temperature, forest age, forestcover, soil thickness, precipitation and aspect were well relatedto FGS. The effects of a temperature decrease and a precipitationincrease on FGS would be 2.5–8 per cent per degree centigradeand 10 per cent per 100 mm, respectively. The combination oftemperature increase and precipitation changes under futureclimate change is likely to result in a decrease of FGS, thoughthis does not take account the effect of increasing CO₂. Wealso used multifactorial regression models to analyse the effectsof site factors on FGS of Pinus tabulaeformis Carr. and Robiniapseudoacacia L., two major species used in afforestation inthe Taihang Mountains. Although site factors had similar effectson FGS, diameter at breast height and tree height of both species,prediction accuracy (regression coefficient) was improved greatlywhen we treated the species separately.     

人类宜居的汝城中部盆地气候舒适度研究

通过空气温度和相对湿度的组合确定人对周围环境感觉舒适的程度,采用舒适度列线图确定汝城县近三年逐日气候舒适程度。根据舒适程度分类标准,计算各等级的天数和各年的气候舒适期及其逐月分布状况,取三年平均值。采用Biiltner确认的日舒适有效温度等级,用日舒适有效温度计算式,计算每日逐时舒适有效温度及其持续时间。结果表明汝城县中部盆地,年气候舒适期长达196d,是目前湖南气候舒适期最长的县域。盛夏7月,昼夜24h内,夜间舒适有效温度持续长达9~16h,无极不舒适时间。适宜开展休闲度假、生态养生旅游,是人类居住的理想地域。       

“一带一路”背景下中柬林业合作现状与展望

文中结合中国"一带一路"倡议、"三亚宣言""金边宣言"等中柬林业国际合作的大背景,对中柬开展的主要林业合作进行简要回顾;在此基础上,从发展目标、基本原则、工作构架、合作方向等方面,对中柬未来林业合作的前景进行了展望。     

观赏竹在北京地区园林绿化中应用的调查与分析

随着首都园林绿化建设的迅速发展,观赏竹已逐渐成为北京地区园林绿化的重要植物材料,并达到了很好的园林景观效果。调查了北京地区观赏竹的主要分布、生长状况及园林应用,分析了北京地区竹种分布和应用频率、生长状况及园林应用形式等,提出了较适合北京地区生长的竹种及竹品种,并就观赏竹的养护技术要点提出了建设性意见。