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Nurmawan, W.
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Agriculture, Biological Sciences & Forestry

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ANALISIS KEMAMPUAN VEGETASI DALAM MEREDAM KEBISINGAN Putra, Imam Syah; Rombang, J. A.; Nurmawan, W.
EUGENIA Vol 24, No 3 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.24.3.2018.22660

Abstract

ABSTRACT Noise is one of the environmental problems that is often overlooked. To solve an environmental problems like this, vegetation is considered as the most effective and efficient noise damper. This research was conducted in Warembungan Village, Pineleng District, Minahasa Regency from May to July 2018, using the 3 factor factorial field experiment method in a Randomized Block Design, 3 main factors are vegetation canopy cover level, rotation per minute (RPM) rate of sound source, and distance level. The vegetation canopy cover level was determined purposively.The aim of this research to determine the capacity of various level of vegetation canopy coverage to reduce noise at various levels of noise. The role of vegetation in reducing noise depends on the coverage of vegetation canopy. At low level coverage of vegetation canopy, noise decreases about 1.25 dBA or 1.69% lower than the noise recorded without vegetation coverage. at the middle level coverage and high level coverage of vegetation canopy, the noises decrease about  2.46 dBA (or 3.32% lower) and 5.72 dBA (or 7.82% lower) respectively. Keywords: sound, noise, vegetation, canopy cover
ANALISIS KANDUNGAN TIMBAL (Pb) DALAM DAUN TANAMAN DI RUANG TERBUKA HIJAU Nurmawan, W.; Ogie, Tommy B.; Kainde, R. P.
EUGENIA Vol 25, No 3 (2019)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.25.3.2019.31403

Abstract

Lead (Pb) is a highly toxic heavy metal that can have a negative influence on chlorophyll because most of it is accumulated by plant organs, namely leaves, stems, and roots, as well as soil around plants. This study aims to examine the Pb content in the leaves of Angsana (P1), Trembesi (P2), and Mahoni plants in the urban green spaces around UNSRAT (T1), KONI (T2) and Sparta Tikala Sport Field (T3) in Manado. Pb content testing uses the AAS (Atomic Absorption Spectrophotometery) method in the laboratory of Manado Industrial Standards Agency. This research was compiled using a Randomized Block Design (RCBD) with 2 treatment factors, namely tree species (P) and sampling locations (T). Each treatment was repeated 3 times to obtain 27 experimental units. The results showed that the treatment of tree species and sampling locations had a significant influence on lead sorption by leaves. Interaction of P3T3 treatment produced the highest lead sorption at 1.14 ppm, which was not significantly different from P3T1 (1.12 ppm), P3T2 (1.07 ppm), P2T2 (1.01 ppm), P2T3 (0.97 ppm), P2T1 (0.97 ppm), P1T3 (0.92 ppm) but significantly different from P1T2 (0.89 ppm) and P1T1 (0.87 ppm).  Overall, the results of Pb sorption are within the normal limits of Pb content in plants ranging from 0.5 to 3.0 ppm.
INVENTARISASI POLA AGROFORESTRI DI DESA TONSEA LAMA KECAMATAN TONDANO UTARA KABUPATEN MINAHASA Mataputung, Sifan M.; Nurmawan, W.; Sumakud, Maria Y. M. A
EUGENIA Vol 25, No 2 (2019)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.25.2.2019.31400

Abstract

Agroforestry is a land management system used in combination with agricultural production that includes fruit trees and pastoral practices with forestry plants. One of the most efficient ways to solve pattern-related agroforestry problems is by using a central plant species that will play a role in multiple land uses. Inventory is the practice of listing plant and animal species in the forest, as well as potential resources. This study was done in Tonsea Lama village, North Tondano district, Minahasa regency, in the months of April to May 2018, with the purpose of making an inventory of agroforestry land use patterns. Result of this study are expected to provide actionable data for future studies on inventory of agroforestry patterns, as well as information for planning agroforestry patterns and land use. Data collection used purposive sampling methods. Agroforestry in Tonsea Lama village was found to follow the following patterns: 13 gardens with agrosilviculture patterns (86,67%) and 2 gardens with agrosilvopastoral patterns (13,33%). There were 74 different types of plants in the agroforestry systems.
Co-Authors JOHAN A. ROMBANG Kainde, R. P. Maria Y.M.A. Sumakud Mataputung, Sifan M. Ogie, Tommy B. Putra, Imam Syah