MODEL PENDUGA VOLUME POHON NYAWAI (Ficus variegata Blume) DI KALIMANTAN TIMUR

Qirom, Muhammad Abdul; Supriyadi, Supriyadi

doi:10.20886/jpht.2013.10.4.173-284

Cited by 10 publications

(13 citation statements)

References 6 publications

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“…Disamping untuk kayu pertukangan, dapat juga untuk kayu lapis, peti kemas dan alat rumah tangga (Liu et al, 2008). Volume kayu nyawai mempunyai variasi yang cukup tinggi diantara pohon, rerata volume tanaman nyawai pada umur 4 tahun sebesar 21,66 m 3 /ha; pada umur 5 tahun sebesar 24,20 m 3 /ha; pada umur 6 tahun sebesar 38,84 m 3 /ha (riap volume sebesar 6,5 m 3 /ha/tahun) (Qirom & Supriyadi, 2013).…”

Section: Pendahuluanunclassified

Variasi Pertumbuhan dan Estimasi Parameter Genetik Semai Nyawai (Ficus variegata Blume)

Haryjanto¹

2018

bionature

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Growth variation and genetic parameter estimation of Ficus variegata Blume seedlings were done at The Centre for Forest Biotechnology and Tree Improvement, Yogyakarta at 8 months of age. Genetic materials from Banyuwangi population which comprised of 15 families and Cilacap-Pangandaran population comprised of 19 families. The trial was designed as a Randomized Completely Block Design (RCBD) with family as treatment, 3 replications and each replication comprises 10 seedlings. The purpose of this study was to observe growth variation and genetic parameter of these populations at seedlings level. Analysis of variance was performed to find out family effect on height and diameter traits. Analysis of variance component was used to estimate coefficient of genetic variation, heritability and genetic correlation. This study showed that family effect on height and diameter variation was very significant at both populations. The estimation of coefficient of genetic variation for height and diameter trait ranged from 10.80% (categorized as intermediate) to 18.04% (categorized as high). Family heritability estimation for height trait ranged from 0.96 to 0.99 and diameter trait ranged from 0.89 to 0.96, both categorized as high. Strong genetic correlation for height and diameter trait ranged from 0.87 to 0.89.

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Section: Pendahuluanunclassified

Variasi Pertumbuhan dan Estimasi Parameter Genetik Semai Nyawai (Ficus variegata Blume)

Haryjanto¹

2018

bionature

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“…Pengukuran dilakukan pada saat tanaman berumur 4 tahun setelah penanaman. Volume pohon dihitung dengan rumus (Qirom & Supriyadi, 2013): Analisis varians dilakukan menggunakan data individual dengan model linear sebagai berikut:…”

Section: Pengumpulan Dataunclassified

SELEKSI DAN PEROLEHAN GENETIK PADA UJI KETURUNAN NYAWAI (Ficus variegata Blume) DI BANTUL

Haryjanto¹,

Prastyono²,

Hadiyan³

2018

JPTH

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Nyawai (Ficus variegata Blume) is a fast growing species which is promising for forest industrial plantation. Tree improvement of nyawai was then initiated through some progeny trials involving wide range of genetic base in Bantul. Study on initial growth reported that nyawai originated from Cilacap-Pangandaran showed higher genetic variation than those from other locations. However, further growth performance including the effect of selection in the progeny trial was not reported. This study was aimed to observe the growth and genetic parameter of nyawai in the progeny trial at advanced age. The genetic gain resulted from series of within plot selection was also estimated. The design of progeny trial was a randomized complete block with 19 families from Cilacap-Pangandaran, 4 non-contiguous tree-plot, 7 blocks at spacing of 5 m × 5 m. The observed traits were height, diameter at breast height and volume at four years of age. The results of study showed that survival rate was high at 89%. The mean annual increment for height, diameter and volume were 1.52 m/yr; 2.35 cm/yr and 8.65(×10-3) m 3 /yr, respectively. The proportion of variance to the total variance for family, plot and within plot ranged from 0.06% to 2.10%, 25.54% to 27.50% and 70.57% to 73.91%, respectively. In general, narrowsense heritability for individual, family and within family were low. Genetic gain from within family selection that was practiced as within plot selection using selection ratio 25% were also low ranging from 0.19% to1.91% for all traits.

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“…Hal ini menunjukkan bahwa keragaman volume pohon karet dipengaruhi oleh lilit batang setinggi dada. Oleh karena itu, hasil ini sama dengan beberapa penelitian yang dilakukan, dimana terdapat hubungan korelasi yang erat antara diameter dengan volume pohon dengan R 2 lebih besar dari 60% (Qirom & Supriyadi, 2012;Qirom & Supriyadi, 2013). Model penduga volume pohon karet klon GT1, PR255, PR261, dan klon gabungan dipengaruhi oleh lilit batang setinggi dada dan dipengaruhi oleh jenis klon.…”

Section: Pengolahan Dan Analisis Data a Perhitungan Volume Pohon Aktualunclassified

Model Pendugaan Volume Pohon Karet Saat Peremajaan Di Sembawa, Sumatera Selatan

Sahuri¹

2017

Jur.pen.hut.tanaman

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Estimation model of rubber (Hevea brasiliensis) tree volume compiled pursuant to one independent variable of stem girth. This study aimed to develop a model of mathematical equations to estimate the volume of rubber trees of clones GT 1, PR 255, PR 261, and the combined clones. The experiment was conducted at the Sembawa Research Station, South Sumatra. Sampling was purposive. The results showed that the volume of rubber tree clones of GT1, PR255, PR261 and mixed clones affected by stem girth at breast height and affected by clone.The model of PR255 clone volume, VPR255=0.5827G1.7182 (R 2 =95.6%), klon GT1 VGT1=0.5818G1.0352 , (R 2 =97.8%), klon PR261 VPR261=0.5651G 0.6471 (R 2 =93.5%) and the mixed clones, V=0.5806G 0.5696 (R 2 =98.6%). At replanting time, rubber wood has a potential used for sawn timber, plywood, veneer and MDF raw materials. The biggest utilization of rubber wood is for MDF raw materials, because in MDF processing all parts of the trees can be utilized.Keywords: Clone, hevea brasiliensis, stem girth, and volume estimation ABSTRAK Model penduga volume pohon karet (Hevea brasiliensis) disusun berdasarkan satu peubah bebas lilit batang. Penelitian ini bertujuan menyusun model persamaan matematis untuk menduga volume pohon karet jenis klon GT 1, PR 255, PR 261, dan klon gabungan. Penelitian dilaksanakan pada areal peremajan karet di Kebun Percobaan Balai Penelitian Sembawa, Sumatera Selatan. Pengambilan sampel pohon dilakukan secara purposive. Model penduga volume pohon karet klon GT1, PR255, PR261, dan klon gabungan dipengaruhi oleh lilit batang setinggi dada dan dipengaruhi oleh jenis klon. Model penduga volume klon PR255, VPR255=0,5827G 1,7182 (R 2 =95,6%), klon GT1 VGT1=0,5818G 1,0352 (R 2 =97,8%), klon PR261 VPR261=0,5651G 0,6471 (R 2 =93,5%), dan klon gabungan, V=0,5806G 0,5696 (R 2 =98,6%). Pada saat peremajaan, kayu karet memiliki potensi untuk digunakan dalam industri kayu gergajian, kayu lapis, veneer, dan bahan baku MDF. Pemanfaatan kayu karet terbesar adalah untuk bahan baku MDF, karena pada pengolahan MDF semua bagian pohon dapat dimanfaatkan.Kata kunci: Hevea brasiliensis, klon, lilit batang, dan pendugaan volume

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MODEL PENDUGA VOLUME POHON NYAWAI (Ficus variegata Blume) DI KALIMANTAN TIMUR

Cited by 10 publications

References 6 publications

Variasi Pertumbuhan dan Estimasi Parameter Genetik Semai Nyawai (Ficus variegata Blume)

Variasi Pertumbuhan dan Estimasi Parameter Genetik Semai Nyawai (Ficus variegata Blume)

SELEKSI DAN PEROLEHAN GENETIK PADA UJI KETURUNAN NYAWAI (Ficus variegata Blume) DI BANTUL

Model Pendugaan Volume Pohon Karet Saat Peremajaan Di Sembawa, Sumatera Selatan

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