关于山东省小城镇园林景观建设的探讨

本文分析了山东省小城镇园林景观建设存在的问题,提出小城镇园林景观建设要编制科学的建设规划,应突出地方特色,重视营造植物景观,注重节约。同时要充分发挥政府宏观调控职能。     

焦作地区野果植物资源的调查与研究

焦作地区山地广阔,自然条件优越,植物资源十分丰富,且有很多可供开发利用的野生植物资源。其中野果植物是野生植物资源中利用价值较高的类群。据初步统计,焦作地区有各类野果植物12科、75种(含变种、变型)。然而,目前这些野果资源未被人们充分重视和利用。     

大丽花品种资源的研究

探讨了大丽花品种花型的演变与进化教唆地我国的大丽花品种资源作了初步调查，对品种分类推进了比较研究，按照花朵特征，花瓣形状变化及花蕊瓣化程度，将大丽花品种分为１０个花型，根据调查发现生产存在的问题，并提出具体解决途径。     

福建一新记录归化植物——伏胁花

报道福建玄参科一新记录归化植物——伏胁花[Mecardonia procumbens(Mill.)Small]。凭证标本存放于福建农林大学林学院树木标本室(FJFC)。     

Phosphorus Fertility Assessment of Intensively Farmed Areas of Catchments Draining to the Great Barrier Reef World Heritage Area; 1: Soil Phosphorus Status

Abstract

Australia's reef water quality protection plan has a key objective: “reduce the load of pollutants from diffuse sources in the water entering the Reef.” This article reports on a survey to assess the contemporary phosphorus (P) status of fertilized cropping soils across 21 catchments in coastal Queensland, Australia. The survey focused on surface soils from cane farms, vegetable and subtropical/tropical fruit tree sites. There were sampling depth effects on P levels in sugar and fruit tree sites (lower with depth). Importantly, 84% of 105 sugarcane sites were excessively fertile and only 3% rated low (P deficient). Some 75% of 16 vegetable sites and 38% of 8 fruit tree sites had excess ratings for extractable soil P fertility. Highest total P levels (0–10 cm) occurred in fruit tree sites, followed by vegetable and sugarcane soils. There are regional differences in P soil fertility, and the recycling of mill by‐products needs attention. Part 2 (Bloesch and Rayment 2006 Bloesch, P. M. and Rayment, G. E. 2006. “Phosphorus fertility assessment of intensively farmed areas of catchments draining to the Great Barrier Reef World Heritage Area, 2: Potential of soils to release soluble phosphorus”. In Communications in Soil Science and Plant Analysis 37 [Google Scholar]) examines the potential of these soils to release soluble P in a nutrient‐sensitive area.     

Effects of naturally recovered vegetation on chemical speciation of Mn in gold-tracesmining wasteland,northeastern China

应用BCR连续提取法,以大兴安岭漠河县胭脂沟典型采金迹地4种自然植被群落类型为研究对象,研究了不同植被群落类型对土壤锰元素4种化学形态的影响。结果表明：大穗薹草--玉蝉花群落、兴安柳--白桦群落、兴安落叶松群落和樟子松群落土壤弱酸可提取态锰平均含量占该群落总量的比例分别为36.25%、36.63%、31.04%和43.39%;可还原态锰平均含量占总量的比例分别为30.71%、32.98%、36.80%和27.28%;可氧化态锰平均含量占总量的比例分别为9.07%、7.10%、8.30%和7.13%;残渣态锰平均含量占总量的比例分别为23.97%、23.28%、23.86%和22.20%。通过因子分析表明：大穗薹草--玉蝉花群落对锰难分解形态固持效果好,且对土壤弱酸可提取态锰含量积累较高;兴安柳--白桦群落对锰难分解形态固持效果差,且对土壤弱酸可提取态锰含量消耗较大;樟子松群落对土壤弱酸可提取态锰含量积累程度最高,且有利于锰难分解形态向着对植物有效的形态转化;兴安落叶松群落对土壤弱酸可提取态锰含量消耗最大,且对锰难分解形态活化程度低。此研究结果可为采金迹地人工恢复植被过程中筛选植物提供参考。     

球花石斛人工授粉试验

试验表明球花石斛通过人工异花授粉才能结实,同株异花在开花后第3、5、10 d授粉的座果率依次为43%、52%、15%,异株异花相同时间授粉的座果率依次为45%、54%、18%,两者座果率差别不大;花开后第3～10 d都能人工授粉,但以花开后第5 d左右授粉的座果率最高。     

Effects of Water Deficit on the Dynamics of Flowering and Fruit Production in Capsicum chinense Jacq in a Tropical Semiarid Region of Venezuela

The degree of crop sensitivity to water deficit, during the different developmental stages of a plant, is an important aspect to consider in tropical semiarid regions. The effect of water deficit on flowering dynamics and fruit production of sweet pepper (Capsicum chinense) was evaluated under several water regimes, during three consecutive years. A complete randomized block design with three replicates was employed. Flowering dynamics and fruit production were measured weekly, and water potentials were obtained twice during the experiments. For all years, flowering began at approximately 70 days after transplanting. In the most favourable year (trial 1996), there were no differences in total flower and fruit production in terms of irrigation frequency. For the other less favourable years, flowering and fruit production were significantly different between irrigation frequencies. Our results show that low water availability, prior to flowering, reduces the number of flowers produced and retards the occurrence of maximum flowering. On the other hand, a water deficit during the period between flowering and fruit development reduces final fruit production. This suggests that a water deficit during this last stage affects final yield to a greater extent.     

病态池的检查和维修技术

随着沼气建设的快速发展,病态池的数量也随之增多。本文就如何分辨沼气池和输气线路病态、确定病态沼气池的病态类型、查找病态池漏水漏气部位及维修病态池提出了具体的方法。     

小城镇居住区环境的生态补偿设计研讨

针对小城镇居住区环境的现状,从生态学的角度提出改善种植质量、选择适宜的树种和合理的施工与管理方法、增加空间变化等方面进行了生态补偿设计方法的探讨,同时对加强居住区生态文化的建设、提高居民的意识等方面提出了一些合理化建议。