New proposals of the recycling system to symbiose with the nature based on the evaluation of the environmental improvement functions of roof-top planting in urban area

根据对城市居民进行的一些问卷调查，他们更喜欢公园和路边树木，而不是建筑物的绿色屋顶，因为他们所在的城市地区是绿色的。在公共措施方面，城市居民优先对大规模的私人机构实施绿化。对于有屋顶种植政策的地方政府来说，问题是缺乏推广预算，有必要对公民进行种植意识的教育。另一方面，对于屋顶种植的设施，由于设施管理员的支付金额很大，他们需要不断的维护费和减税的帮助。甘薯是在屋顶的水培系统中种植的。与混凝土表面相比，植物冠层温度最多降低23℃。甘薯冠层温度低于草地和树木冠层。甜蜜的…生长速率较高的马铃薯品种表现出较强的降温能力。屋顶上的红薯产量与常规田间种植的植物基本相同。屋顶上的池塘里有蜻蜓幼虫、黄腹蜻蜓幼虫和粘虫成虫等水生昆虫。地面和屋顶上均有燕尾蝶、马哈蝶和徐氏凤蝶幼虫的存在，屋顶上的死亡率明显较低。小区试验结果表明，屋面种植设施对其周围和建筑内部的热环境具有一定的保护作用。该设施还可以减少屋顶上的降雨排放。该设施净化大气污染物负荷的功能基本不能预期，但地面有草坪的设施只能减少大气中的总氮负荷。为了评价绿化屋顶潜热通量对改善城市热岛效应的效果，将池塘安装在建筑物屋顶上。通过水位和降水观测估算了夏季的蒸散量。在76天的研究中，总蒸散量为361毫米，相当于总太阳辐射能量的78%。水面复盖水生植物提高了蒸散效率。较少

According to some conducted question surveys for urban residents, their preferences are for parks and roadside trees rather than green roofs of buildings as greenness in their city areas. In terms of public measures, urban residents give priority to imposition of greening of the on a large scale private institutions. As for the local governments that have the policy of a rooftop planting, the problem is the lack of the budget for the promotion and it is necessary to educate the citizens concerning the consciousness of planting. On the other hand, as for the facilities with the rooftop planting, they need the continual help of the maintenance expenses and the reduction of the tax because the payment of the facility administrator was large. Sweet potato plants were cultured in a hydroponic system on a roof. The plant canopy temperature decreased by 23℃ at most compared with a concrete surface. The temperature on the sweet potato canopy was lower than a grassland and tree canopies. Sweet … More potato varieties with higher growth rates showed higher ability for reducing temperatures. The yield of sweet potatoes on the roof was mostly the same as conventional field grown plants. Aquatic insects such as larvae of a dragonfly, Pantala flavescens, and adults of a dytiscid, Eretes sticticus, occurred in the ponds placed on the roof. Larvae of swallowtail butterflies, Papilio machaon and Papilio xuthus were found both on the ground and on the roof, and the mortality rate was significantly lower on the roof. Result of a plot experiment indicated that roof planting facility had a conservation function of thermal environment of its surroundings and the inside of building. The facility could also reduce the discharge of rainfall on the roof. The function to purify pollutant load from atmosphere by the facility cannot be expected basically, but the facility with lawn on its surface can reduce only the total nitrogen load from the atmosphere. In order to evaluate the amelioration of urban heat island effects with latent heat flux from green roofs, the pond was installed on a building roof. Evapotranspiration in summer was estimated with the observation of water level and precipitation. Over the 76 days study, total evapotranspiration was 361 mm corresponding to 78% energy of total solar radiation. Covering with aquatic plants on water surface increased evapotrnspiration efficiency. Less