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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
Jan Barlian
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Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance

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PENGUJIAN CEPAT VIADILITAS DENIH PINUS (Pinus merkusii) DENGAN KONTRAS RADIOGRAPHY Barlian, Jan; Rinawan, Decky; Nurhasybi, ,
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 26 No. 3 (1998): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1653.1 KB) | DOI: 10.24831/jai.v26i3.1586

Abstract

The objective of the research was to determine the best chemical for radiography contras test of pines seed viability and the key for interpretation of pines seed viability. The experiment was conducted at Seed Technology Laboratory of Forestry, Bogor from February until May 1994.           The result found the best radiography test for the pine seed with parameters for X-ray as follows, (KVp) 14 K volt voltage, (mA) 5.5 A, length of radiation (et) for 12 second, distance of focus film to object (FFD) by 25 cm, and film placed (OFD) directly above the X-ray film.           Contrast chemical BaCl2 decrease the seed viability at concentration of 30 % and soaking time for 30 minutes. Both KI and NaI decrease the viability at 10% and soaking time of 45 and 15 minutes, consequtively. Contrast chemical effectively interprete the viable and non viable seed at 10% concentration.           Viable seeds have complete structure, did not absorb the chemicals and the physical damage was less than 25% of the seed space. Non viable seeds did not have a complete structure, absorbed the chemicals and physical damage was more than 25% of the seed space
STUDI FENOLOGI DAN PENGARUH POSISI BUAH SERTA UKURAN BENIH TERHADAP VIABILITAS BENIH GMELINA (Gmelina arborea Roxb) Barlian, Jan; Yeni, Hediani; Masano, ,
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 26 No. 2 (1998): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1086.883 KB) | DOI: 10.24831/jai.v26i2.1588

Abstract

The objective of this research was to study the development of the flower and fruit, to enable determining physiological maturity (PM) and the effect of fruit position and seed size on seed viability of Gmelina. Gmelina seed reaches physiological maturity at the age 32 days after anthesis to have maximum potential viability, vigor and seed dry weight. Fruit position has significant effect on germination potential. Seed size do not affect parameter observed, and so is the interaction between seed position and seed size. Fruit from the middle part of the tree's stand has the highest germination potential and those from the top has the lowest. Seed having small (size 15-20 mm) has better viability compared with the big ones (> 20 mm) and seed from the fruit of the top and below which size 15-20 mm and > 20 mm.
Co-Authors , Masano , Nurhasybi Decky Rinawan Hediani Yeni