浅析如何打造现代城市观花景观

针对贵州独特的气候条件与自然资源,首先提出城市观花景观的营造原则,在此基础上对于不同功能区和范围,提出了相应的景观营造方法及推荐观花树种,以期为贵州城市绿化工作提供参考。

不同用途树叶片主要物质含量的研究

[目的]采用不同的方法,对可食花、可食果、可观花3类不同用途的8种树叶片进行了研究。[方法]测定了抗逆性、糖类、营养物质3个方面9个指标。[结果]可食果树叶片黄酮含量高,可食花树叶片VC含量高。可食花、果树叶片中糖类含量在叶脉和叶中部多,SOD和营养物质在叶肉中多。可观花树叶片黄酮、蛋白质含量在新叶中高,SOD、VC、叶绿素在叶肉中高,可溶性糖含量在叶脉中高,还原糖和总糖及可溶性固形物含量在老叶中高。[结论]参试的8种叶片中龙眼树叶片基部SOD最高,芒果树新叶中黄酮和叶中部还原糖含量最高,黄槐树叶肉中VC含量最高,紫荆花树叶脉中蛋白质和叶中部叶绿素含量最高,桂花树叶脉中可溶性糖和总糖含量均最高,水石榕老叶中可溶性固形物含量最高。

蓝紫色梦幻——悉尼蓝花楹

初春的澳大利亚悉尼,让你魂牵梦断莫过于一抹柔情的蓝紫色,优雅希迹、纷繁平和、无处不在,那就是蓝花楹,世间罕有的开蓝紫色花的乔木。黑格尔曾说“大自然本身,包括黎明和日出,其实并没有美丑的问题。日出之所以美,是我们看到黎明的时候,唤起了生命里的某种感叹。”正如潜心半个世纪研究色彩的法国历史学家米歇尔·帕斯图罗定义色彩首先是一种社会行为,与文化息息相关,并且在某一个特定的社会文化地域内,随着时代的演变,不断创造、变迁。相信从悉尼环形码头Circular Quay岩石区The Rocks最初登上这片沃土的英国殖民者,一定是为这种奇异的蓝紫色花而如痴如醉、为这片具有生命力的迷人沃土而流连于此的吧。

Observation and Comparison of Pollen Submicroscopic Morphology of Seven Mulberry(Morus alba Linn.) Cultivars

[Objective] This study aimed to investigate the submicroscopic structure and morphological characteristics of mulberry pollen. [Method] Mulberry pollen of seven cultivars were treated by glutaraldehyde fixing, alcohol gradient dehydration, freeze-drying and metal plating to observe the size and surface ornamentation under the scanning electron microscope （SEM）. [Result] The pollen surface characteristics and ornamentation were clearly visible, indicating that this method is suitable for SEM observation of mulberry pollen; experimental mulberry pollen was nearly spher- ical, with two germination apertures and processes on aperture membrane; polar axis was 15.99-22.63 μm long, and equatorial axis was 14.98-20.78 μm long; the pollen volume of ＂Yu No.2＇ was the maximum, while that of ＂Jinxuan No.7＇ was the minimum; the surface of mulberry pollen showed smooth and tumor-like protuberance ornamentations, covered with different densities of particles. [Conclusion] Glutaralde- hyde fixative-alcohol gradient dehydration is an ideal method for morphological char- acteristics of mulberry pollen. This study may provide useful information for palynology identification of Morus plants or even species-level systematic classification.