园林废弃物堆肥对宫粉紫荆袋苗生长的影响

选用黄泥、黄泥︰泥炭=5︰2、黄泥︰园林废弃物堆肥产品=5︰2、黄泥︰园林废弃物堆肥产品︰泥炭=5︰1︰1等4种基质,研究其对宫粉紫荆袋苗生长的影响。综合分析植株株高、叶片叶绿素含量及叶片氮含量3个指标,结果表明:以黄泥︰园林废弃物堆肥产品︰泥炭=5︰1︰1配制的基质对宫粉紫荆生长有最好的效果,其次是以黄泥︰园林废弃物堆肥产品=5︰2配制的基质,说明园林废弃物堆肥产品是园林苗木基质的优良组成材料。     

建筑物旁园林植物的选择与配置

介绍建筑物与园林植物的关系,总结建筑物四周园林植物的配置原则,提出了建筑周围园林植物配置的方法以及建筑不同部位植物配置要求,对建筑物周围环境的绿化景观设计具有一定的参考意义。     

Comparison of root system architecture and rhizosphere microbial communities of Balsas teosinte and domesticated corn cultivars

The progenitor of maize is Balsas teosinte (Zea mays subsp. parviglumis) which grows as a wild plant in the valley of the Balsas river in Mexico. Domestication, primarily targeting above-ground traits, has led to substantial changes in the plant's morphology and modern maize cultivars poorly resemble their wild ancestor. We examined the hypotheses that Balsas teosinte (accession PI 384071) has a) a different root system architecture and b) a structurally and functionally different rhizosphere microbial community than domesticated cultivars sweet corn (Zea mays subsp. mays accession PI 494083) and popping corn (Zea mays subsp. mays accession PI 542713). In a greenhouse experiment, five plants from each corn variety were grown in individual pots containing a Maury silt loam – perlite (2:1) mixture and grown to the V8 growth stage at which rhizosphere bacterial and fungal community structure was assessed using terminal restriction fragment length polymorphism and fatty acid methyl ester analysis. Functional characteristics of the rhizosphere were assayed by examining the potential activity of seven extracellular enzymes involved in carbon, nitrogen and phosphorus cycling. Root system architecture was characterized by root scans of sand grown plants at the V5 growth stage. Compared to the control the sweet corn rhizosphere had different bacterial and fungal community structure, decreased fungal diversity and increased bacterial abundance. Teosinte caused a significant change in the rhizosphere bacterial and fungal community structure and increased bacterial abundance, but no significant decrease in bacterial or fungal diversity where the former was found to be significantly greater than in the sweet corn rhizosphere. Popping corn did not trigger significant changes in the bacterial or fungal diversity and bacterial abundance in the soil. The individual popping corn plants changed the bacterial and fungal communities in different directions and the overall effect on community structure was significant, but small. Of the enzymes analyzed, potential N-acetylglucosaminidase (NAG) activity was found to contributed most to the differentiation of teosinte rhizosphere samples from the other corn varieties. The teosinte root system had proportionally more very fine (diameter < 0.03 mm) roots than popping corn and sweet corn and it developed the highest root to shoot dry weight ratio, followed by popping corn. Sweet corn had significantly lower average root diameter than popping corn and teosinte and grew proportionally the least below-ground dry mass. The results allude to functional and structural differences in the rhizosphere microbial communities of the corn varieties that, with additional research, could lead to useful discoveries on how corn domestication has altered rhizosphere processes and how plant genotype influences nutrient cycling.     

清晖园的园林艺术文化探究

园林历史文化特色,很大程度上受到地域的自然环境、社会环境以及园主思想境界等因素的影响。据此,本文对清晖园的建园历史、园林布局、庭园空间、建筑特征和装饰风格等进行研究探讨以了解其园林艺术文化,希望为新时期的园林建设提供借鉴经验,并使优秀的广东传统园林文化发扬光大。     

广州地区高校毕业花束使用状况调查

通过调查理清广州地区大学生对毕业花束的价格、种类以及设计包装的要求,以期为花商的市场定位、花艺行业的发展提供理性借鉴。     

西南典型喀斯特洼地风景园林规划设计探析

基于风景园林多学科交叉的性质,以毕节撒拉溪示范区风景园林规划为例,探讨喀斯特洼地景观规划设计与水土保持措施。通过文献法、实地调查法、多学科综合研究法,分析喀斯特洼地在空间、视觉、文化等方面的特征,从自然条件、环境容量与规模预测、区位交通、资源分析、使用人群以及SWOT分析等方面,对喀斯特洼地进行功能分区、景观空间布局、道路布局、植物配植以及园林建筑营造研究,将景观营造与石漠化治理相结合,探索一种适宜喀斯特洼地的风景园林规划设计方法。     

吉兰泰盐湖不同造林方式下梭梭枝系构型特征分析

人工造林是干旱荒漠地区减少土地荒漠化的重要手段。不同造林措施影响着植物存活率及植物的生长状态。为探究干旱荒漠区不同造林方式对梭梭地上构件在空间排列方式的影响，采用枝系构型的理论和方法，对吉兰泰不同造林方式中梭梭的分枝构型特征进行研究。结果表明:1）不同造林方式下的梭梭分枝构型有较大的差异，主要体现在分枝长度、角度、枝径、体积等变化明显 ；2）不同造林方式中梭梭的分枝长度、枝径、体积总体均呈现随枝序级别的增加其值减小的趋势，但各级别分枝角度表现出不规则分布的特征；3）不同造林方式中梭梭的总体分枝率表现为:水冲造林＞机械穴植造林＞抢墒造林，分别为6.51±1.95、2.88±0.77、2.23±0.61。抢墒造林的梭梭枝系长度、枝径、体积、分枝能力均优于水冲、机械穴枝造林，能够在有限的自然资源中获得更多的空间资源。因此，抢墒造林技术是更适宜吉兰泰当地梭梭生长的人工造林方式。     

华侨城欢乐海岸景观规划设计

欢乐海岸项目以海洋文化为主题，以生态环保为理念，以创新型商业为主体，以构建都市滨海健康生活为梦想；欢乐海岸项目的建成及周边区域的可持续城市规划将重建沿海建成区生态系统，平衡环境与人类使用海岸线之间的关系，为滨海城市提供宜人的生态环境。     

大豆叶柄角的QTL定位分析

叶柄角是大豆株型的重要构成因素,影响大豆冠层结构、光合作用效率以及最终产量。解析大豆叶柄角的遗传基础对提升大豆产量具有重要意义。本研究以2个叶柄角具有显著差异的亲本BLA和SLA以及它们衍生的RIL群体为材料,构建高密度的遗传图谱,对大豆不同部位的叶柄角进行QTL分析,并利用近等基因系验证部分QTL。遗传分析结果显示,叶柄角呈连续正态分布,符合数量性状遗传特征。利用GBS技术构建了包含859个Bin标记的大豆高密度遗传图谱,总遗传长度为2326.9cM,标记间平均距离为2.763cM;共检测到14个调控叶柄角的QTL,LOD值在2.58~4.80之间,可解释遗传变异范围在6.9%~12.4%之间,其中5个QTL定位在第12染色体上且成簇存在;构建的qLA12和qLA18的近等基因系表型结果显示,叶柄角在同一对近等基因家系间差异显著,表明qLA12和qLA18是2个可信的QTL。本研究为进一步克隆调控叶柄角功能基因奠定了基础,为大豆理想株型育种提供了遗传材料。     

莆田城乡风貌特征及其典型性初探

文章以国土风貌的概念为切入点,综合运用文献分析、定性与定量结合等方法,从自然与人文两个方面梳理莆田城乡风貌的要素构成;在此基础上,将两者统一于格局关系、形态规模、地块肌理的表征因子中解译其风貌特征,并就风貌典型性作简要评述,探索改善、重塑并再现莆田典型风貌的策略,以期为当今市域范围内美丽中国背景下美丽莆田的建设提供借鉴。