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JURNAL PEMULIAAN TANAMAN HUTAN
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Core Subject : Agriculture,
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Articles 5 Documents
Search results for , issue " Vol 9, No 1 (2015): Jurnal pemuliaan Tanaman Hutan" : 5 Documents clear
KUALITAS KOKON HASIL PERSILANGAN ANTARA ULAT SUTERA (Bombyx mory L.) RAS CINA DAN RAS JEPANG Andadari, Lincah; Sunarti, Sri
Jurnal Pemuliaan Tanaman Hutan Vol 9, No 1 (2015): Jurnal pemuliaan Tanaman Hutan
Publisher : Center for Forest Biotechnology and Tree Improvement (CFBTI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jpth.2015.9.1.43-51

Abstract

This study was aimed to get the qualified silkworm (Bombyx mory L.) stock by crossing between Chinese dan Japanese races. The materials used in this study were the best fourth lines of Chinese and Japanese silkworm races at Forestry Research and Development Agency, Bogor. Experimental design used in this study was Completely Randomized Design. The results showed that observed parameters were significantly affected by crossed combination. Sixteen crossedbreed combinations resulted were potensial to be selected as commercial stock compared to control BS-09.
ANALISA KIMIA KAYU PADA TANAMAN Araucaria cunninghamii Aiton ex D.Don UNTUK BAHAN BAKU PULP Setiadi, Dedi; Susanto, Mudji; Fauzi, Mohammad Anis
Jurnal Pemuliaan Tanaman Hutan Vol 9, No 1 (2015): Jurnal pemuliaan Tanaman Hutan
Publisher : Center for Forest Biotechnology and Tree Improvement (CFBTI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jpth.2015.9.1.53-60

Abstract

Araucaria cunninghamii is one of the endemic needles tree species grown naturally in Papua. The material used in the study is wood of A.cunninghamii that was planted in the first-generation of progeny test in Bondowoso, East Java. This study aims to determine the characteristic chemical properties of A.cunninghamii wood from some provenances as raw material for pulp. Disk of wood samples were taken from the stem at 50 cm above the ground with 5 cm of thickness. Testing chemical properties include the levels of toluene extractives soluble in ethanol, hot water soluble extractives, holocellulose, cellulose and lignin. Data were analyzed to determine the effect of provenance to chemical properties of wood. The results of study showed that wood sample of A.cunninghamii contained 73.33% holocellulose, 46.39% cellulose, lignin 30.56%, 1.19% ethanol solubility and 1.34% hot water solubility. Based on the composition of chemical substances contained in the wood, A.cunninghamii generally has good quality to be used as raw materials of pulp and paper.
ESTIMASI PARAMETER GENETIK PADA UJI KETURUNAN Alstonia scholaris UMUR DUA TAHUN DI GUNUNGKIDUL, YOGYAKARTA Mashudi, Mashudi; Baskorowati, Liliana
Jurnal Pemuliaan Tanaman Hutan Vol 9, No 1 (2015): Jurnal pemuliaan Tanaman Hutan
Publisher : Center for Forest Biotechnology and Tree Improvement (CFBTI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (122.029 KB) | DOI: 10.20886/jpth.2015.9.1.1-11

Abstract

Estimates of genetic parameter were observed at two years old of Alstonia scholaris progeny trial in Gunungkidul, Yogyakarta. The experimental design of the trial was laid out in Randomized Complete Block Design consisting of 48 families, 5 replications, 4 tree-plot and spacing of 4 x 2 meters. This study is aimed to observe the growth variation (height and stem diameter) and the estimates of heritability and genetic correlation among the two growth traits. The results of study showed that the tested families were significantly different for height and stem diameter. The estimate of individual heritability was high at around 0.53 and 0.44 for height and stem diameter, respectively. While the corresponding of family heritability was at around 0.67 and 0.63 for height and stem diameter, respectively. Positive and strong genetic correlation were found between height and stem diameter of this species at two years of age (rg = 0.94).
PERAN MIKORIZA PADA SEMAI BEBERAPA SUMBER BENIH MANGIUM (Acacia mangium Willd.) YANG TUMBUH PADA TANAH KERING Hidayati, Nur; Faridah, Eny; Sumardi, Sumardi
Jurnal Pemuliaan Tanaman Hutan Vol 9, No 1 (2015): Jurnal pemuliaan Tanaman Hutan
Publisher : Center for Forest Biotechnology and Tree Improvement (CFBTI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jpth.2015.9.1.13-15

Abstract

Plants that have mycorrhizal symbiosis tend to be more resistant to the drought because external hyphae of mycorrhizal will expand the surface of water uptake and it can infiltrate into capillary pores so that water uptake for the host plant need will increase. This study aimed to know the response and adaptation mechanisms of mangium in facing drought stress, to investigate mycorrhizal roles in overcoming drought stress on mangium, and to select the origin of mangium seed source that is tolerant to drought stress. The study used mangium seedlings from four different seed sources and was arranged in split plot pattern of randomized block design, with three factors. The result showed that mangium root infected by mycorrhizal decreased along with increasing level of watering intervals. Mycorrhiza increased height-diameter growth and total biomass of mangium for the entire seed source. Total biomass growth of seven month mangium was significantly influenced by the origin of seed source. The highest total biomass was derived from F-1 Wonogiri (7.14 grams) and followed by Group B (6.82 grams), Group C (6.21 g) and Group A (5.84 g). Adaptation mechanisms of mangium seedlings during drought stress were keeping the water status of the plant, improving plant roots system, and thickening the leaf blades.
UJI ULTRADRY VACUUM UNTUK MENINGKATKAN VIABILITAS PENYIMPANAN BENIH MALAPARI (Pongamia pinnata Merril.) Putri, Asri Insiana; Jayusman, Jayusman
Jurnal Pemuliaan Tanaman Hutan Vol 9, No 1 (2015): Jurnal pemuliaan Tanaman Hutan
Publisher : Center for Forest Biotechnology and Tree Improvement (CFBTI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jpth.2015.9.1.31-41

Abstract

Malapari (Pongamia pinnata) seeds have low sensitivity to desiccation and freezing storage. In the effort to improve the viability of seed storage, preliminary test of the vacuum ultradry storage techniques were important to be done. The purpose of this study was to attain lengthen periode of viability seeds with vacuum ultradry technics. All parameters of the treatment with a vacuum ultradry technique showed better results than the control. Interaction between humidity and incubation period have significantly influnces on shoots length. Interaction between moisture with incubation period and intercation beetwen humidity with temperatures has significant effect on root length. Interaction between moisture, incubation period and temperature have significantly affect to vigor index. The highest vigor index was 8.1050 at 20% humidity, 12 weeks incubation period with temperature 5C,86% higher than in the control.

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