Noise attenuation provided by hedges

During the past few decades, urban areas have experienced increasing environmental stress. Noise is considered as one of the most important sources of urban pollution with adverse effects on human health. Urban vegetation provides many ecosystem services including the reduction of noise pollution. Hedges are widespread in cities and have the peculiarity of being often grown close to the source of noise. The study investigated the noise reduction due to hedges of Prunus laurocerasus and Laurus nobilis and the effect of the vegetation on sound spectra. Four different trials were carried out, including the use of two different noise sources and the measurement of noise at different distances both from the green barrier and from the noise source. During one trial, the influence of the type of ground surfaces between the noise source and the receiver was also evaluated. In the three trials where a significant attenuation of the noise occurred, the porosity of hedges measured less than 4.6% and an average noise reduction of about 2.7 dB(A) (max 7.0 dB(A)) was observed. This effect was particularly relevant in the range of higher frequencies (between 2 and 20 kHz). This study can contribute to plan and design hedges in the urban context.

DIVERSITY OF SOIL ARTHROPOD IN GREEN BARRIER AREA PT. PUSRI

The research was conducted to inventory and identify as well as acknowledge the correlation between vegetation type with soil arthropods in the Green Barrier area of PT Pusri. PT. Pusri green Barrier area is 28 hectares and dominated by 10 types of vegetation, such as, the Angsana (Pterocarpus indicus Wild), Bambu (Bambusa Sp), Beringin (Ficus benyamina), Buah Roda (Hura crepitans L), Jati (Tectona grandis L), Kelampayan (Neolamarckia cadamba) , Ketapang (Terminalia catappa L), Mahony (Swietenia macrophylla King), Pulai (Alstonia scholaris), and Sengon (Paraserianthes falcataria L). Soil arthropods were collected by using pit fall traps and funnel barlese-tullgren in every type of vegetation, between July-August 2015. Identification of arthropod genera Identification has been done in Entomology Laboratory of the Agriculture Plant Disease Faculty Sriwijaya University, and analysis of soil organic in the Laboratory of Soil Faculty of Agriculture Sriwijaya University. The results were obtained into 3 classes of soil arthropods belonging to the 10 orders, 28 families and 35 genera. The diversity index value of soil arthropods in various types of vegetation is classified moderately (H= 1-3), and no type of soil arthropods were dominant, mean that soil arthropods with different types spread over in the various types of vegetation in the area of Green Barrier PT. Pusri. Light intensity abiotic factors play an important role in the life of the soil arthropod communities in vegetation Sengon (Paraserianthes falcataria L) with a correlation coefficient 1.00Keywords: soil arthropods, community structure, a biotic factors, Green Barrier PT. Pusri

GREEN BARRIER PT PUSRI POTENTIAL AS BIRD HABITAT

The study was conducted to determine birds in Green Barrier PT. Pusri and explains the function of the existing vegetation in the Green Barrier for many species of birds. Retrieval of data was conducted in a 28 ha Green barrier area of PT Pusri, during July to August 2015. The collecting of data determined by line transects through observation directly. assuming the selection of sites in the area of water resources and representation of vegetation types that represent a potential habitat for birds. Birds observed then identified and recorded the type, activity include, nesting, feeding, perch and plants that exploited. The results of this study found 17 species in 13 families. Plant species are most frequently used by birds is batai wood (Paraserianthes falcataria). Recorded at least 10 species of birds found in the Green Barrier PT. Pusri utilize these plants as a perch, feeding and nesting. The availability of water in the form of an artificial fish ponds at the fish pond 1 (transect 3) to attract water birds such as; Javan Pond-heron (Ardeola spesiosa) and Common Sandpipers (Tringa hypoleeucos) to come looking for food that needs to be managed to maintain its function as a habitat for birds.Keywords: Birds, plant, habitat, Green Barrier PT. Pusri.

Suggestions for Construction of Chinese Green Barrier

Green barriers of western countries restrict the product export of developing countries. This is a new problem on international trade recent years. After China s entry into WTO, green barriers have become a biggest barrier in Chinese foreign trade. This paper provides the system shortage about Chinese green barriers. So China should launch a campaign to construct the system of green barriers according to Chinese Economic backgrounds. This paper also proposes some law countermeasures to set up and improve the Chinese green barrier system.