Maman Sutisna
Forestry Faculty of Mulawarman University Samarinda

Published : 4 Documents
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Physiological Process of Acacia mangium Willd. Plant of Six Months Old Attacked by Black Spots Disease in PT Itci Hutani Manunggal Terunen Syahfari, Helda; Bratawinata, Ach. Arieffin; Sutisna, Maman; Mardji, Djumali
International Journal of Science and Engineering (IJSE) Vol 5, No 1 (2013)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (329.073 KB) | DOI: 10.12777/ijse.5.1.15-18

Abstract

The purposes of this study were to determine symptoms and signs of black spot disease on mangium plants of 6 months old, frequency of the attacks and their effects on physiological processes of affected phyllode (amount of chlorophyll, transpiration, evaporation and water potential of phyllode). Fieldwork was conducted in the research plots measuring 25 m x 25 m) in mangium plantation. Observed plants were 6 months old amounted to 104 plants at a spacing of 3 m x 2 m, the seedlings were originated from Riau Islands. Plants were observed in the census in research plots .The results showed that the black spot disease was caused by a fungus Meliola brisbanensis with symptoms of black spots on phyllode, where the spots occured more on the upper surface than the lower surface. Other than phyllode, young part of the stem was also attacked. Attacked phyllode changed in color from green to yellow (chlorotic). Frequency of attacks on plot of 6 months old was 62.5%. The amount of chlorophyll in phyllode attacked by black spot fungus was 40.8 Spad. Transpiration velocity had the value of 1284.26 gr/dm2/second, evaporation rate of 0.00019 μgcm2/minute. Water potential of phyllode at 08:00 to 10:00 a.m was 18 bars, at 12:00 a.m to 14:00 p.m 21.2 bars and at 4:00 p.m. to 6:00 p.m. was 9 bars. Environmental factors that influence the physiological process of black spot fungus were soil pH, irradiation intensity, water content of soil and were influenced by factors inside of the black spot disease itself. Doi: 10.12777/ijse.5.1.15-18 [How to cite this article: Syahfari, H., Bratawinata, A.A., Sutisna, M. and Mardji, D. (2013). Physiological Process of Acacia mangium Willd. Plant of Six Months Old Attacked by Black Spots Disease in PT ITCI Hutani Manunggal Terunen. International Journal of Science and Engineering, 5(1),6-11. Doi: 10.12777/ijse.5.1.15-18 ]
Clonal Propagation of Two Clones Eucalyptus Pellita F. Muell By Mini-Cutting Dwi Sulichantini, Ellok; Sutisna, Maman; Sukartiningsih, Sukartiningsih; Rusdiansyah, Rusdiansyah
International Journal of Science and Engineering Vol 6, No 2 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1406.06 KB) | DOI: 10.12777/ijse.6.2.117-121

Abstract

Eucalypt is known as the fastest growing tree species in the world. Some advantages such as fast growing, hight yielding, short rotation, less desease, lots of purposes and good economic benefit have made Eucalypt as the most important forest tree product for industrial raw material in Indonesia. However, those advantages of Eucalypt including fast growing, high yielding, short rotation and less desease can only be achieved through selecting a good clone. Cutting propagation is considered as one of the main methode to produce good seedling. Sprouts of two clones of Eucalyptus pellita F. Muell (E. 13 and E. 77) were collected from mini hedge. Total of 1080 of each clone was planted in greenhouse. The result showned that Clone E. 77 was better than E. 13 in term of growth of rooting, the increment of height, stem diameter and number of leaves at 60 and 75 days after planting
PERUBAHAN PERSEDIAAN HARA DAN KARBON AKIBAT KONVERSI HUTAN ALAM MENJADI LAHAN PERKEBUNAN DI SEKITAR KAWASAN TAMAN NASIONAL LORE LINDU Muhardi, Muhardi; Sutisna, Maman; Basir, Muh; Lahjie, Abubakar M.
AGROLAND Vol 19, No 1 (2012)
Publisher : AGROLAND

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB)

Abstract

Land as a limited resource has been under much pressure due to increasing population which has lead to the conversion of natural forest to satisfy their need of land. The research aim was to study changes in nutrient availability and carbon stock caused by natural forest conversion to plantation in the surrounding area of the Lore Lindu National Park. The research results showed that natural forest converted to monoculture candle nut plantation decreased soil organic matter and total carbon by up to 20% and 45%, respectively, whereas changed to cacao plantation the total carbon declined by up to 44%. Available N, P, K, Mg declined by up to 23%, 30%, 43%, and 35%, respectively, in modest agroforestry. It is recommended that either complex agroforestry or forest plantation can be developed as these types of land use lead to only slightly changes in organic matter/carbon stock and nutrient availability compared to other land use types.
PERUBAHAN PERSEDIAAN HARA DAN KARBON AKIBAT KONVERSI HUTAN ALAM MENJADI LAHAN PERKEBUNAN DI SEKITAR KAWASAN TAMAN NASIONAL LORE LINDU Muhardi, Muhardi; Sutisna, Maman; Basir-cyio, Muhammad; Lajhie, Abubakar M.
Agroland Vol 19, No 1 (2012)
Publisher : Agroland

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB) | DOI: 10.22487/J.24077607.2012.v19.i1.8799

Abstract

Land as a limited resource has been under much pressure due to increasing population which has lead to the conversion of natural forest to satisfy their need of land. The research aim was to study changes in nutrient availability and carbon stock caused by natural forest conversion to plantation in the surrounding area of the Lore Lindu National Park. The research results showed that natural forest converted to monoculture candle nut plantation decreased soil organic matter and total carbon by up to 20% and 45%, respectively, whereas changed to cacao plantation the total carbon declined by up to 44%. Available N, P, K, Mg declined by up to 23%, 30%, 43%, and 35%, respectively, in modest agroforestry. It is recommended that either complex agroforestry or forest plantation can be developed as these types of land use lead to only slightly changes in organic matter/carbon stock and nutrient availability compared to other land use types.Key words : Agroforestry, biomass, carbon, nutrient availability.