Judul: Sago (Metroxylon spp.) Propagation with Ex vitro (Polybag and Raft seedlings) and In vitro through Tissue Culture
Abstrak: Present studies were carried out to determine the effect of auxin, weight of sucker, on root induction and growth variables in nursery of sago seedlings. The research were used Darmaga accession (spineless). For this purpose some parameters were studied after treating suckers with some auxin concentrations, i.e. control (without growth regulators/ 0 mM), 7.40 mM naphthalene acetic acid (NAA), 7.40 mM indole butyric acid (IBA), and 7.40 mM commercial auxin, and weight of sucker i.e 500-999 g, 1 000-1 499 g, and 1 500-2 000 g, with polybag and raft nursery. The treatments were applied by one method (quick dip) and the treated suckers were submerged 30 minutes in pesticides before. This research was conducted at Cikarawang, Dramaga, Bogor, West Java and Physiology and Chromatoghraphy Laboratory, Department of Agronomy and Horticulture, Bogor Agricultural University, from July 2012 to Mart 2013. The result from polybag nursery showed that suckers weight 1 000-1 499 g and 1 500-2 000 g were not significantly different on polibag nursery. The result of without auxin, IBA, NAA, and commercial auxin treatments for survival rate were 52%, 70%, 62%, 53% respectively. Increasing percentage of starch content in line with the increasing weight of sucker. On the raft nursery,treatment of NAA showed significantly inhibit seedling growth, as indicated by reduction the 1st rachis height and amount of 1st rachis leaflets compare with kontrol and commercial auxin. Treatments of auxin did not give significantly different on some variables (number of primary roots, number of aerenchym roots, and the length of root. Survival rate percentage of seedlings were obtained 65% (for both weight sucker 1 000 – 1 499 g and 1 500-2 000 g) on 4 month after nursery (MAN), while the sucker weights 500-999 g produced survival rate percentage is lower than 40%. Either polybag and raft nurseries, showed that there were significantly different to height of abnormal rachis, number of leaflets of abnormal rachis, number of leaflets of 1st rachis, diameter of 1st rachis, number of primary roots, and aerenchyma roots. Both of nursery techniques were not significantly different on percentage of survival rate seedlings. Rachis diameter in raft nursery was significantly higher than in polybag nursery, 5.9 cm and 1.2 cm respectively. The number of primary roots at polybag higher than at raft nursery.Combination treatments of without auxin and suckerr weight 500-999 g has a number of primary roots 5.5 at polibag nursery and 0.13 at raft nursery. Combination treatments of 7.04 mM IBA, without auxin auxin and suckerr weight 1000-1499 g have a number of primary roots 9.6 and 18.2 at polibag nursery and 0.19 and 0.73 at raft nursery, respectively. Combination treatments of without auxin, 7.04 mM IBA, 7.04 AK and suckerr weight 1500-2000 g have a number of primary roots 7.6, 6.8, and 8.8 at polibag nursery and 0.31, 0.29, dan 0.33 at raft nursery, respectively.But, a number of aerenchyma roots at raft nursery were higher than at polybag nursery i.e. 7.08 dan 1, respectively. In vitro culture for sago palm from shoot tip and young leaf explants were conducted. This study was carried
Keyword: root induction, primary roots, aerenchyma roots, sucker, auxin

Judul: Pengelolaan budidaya sagu (Metroxylon spp.) Di PT National sago prima, Selat Panjang, Riau dengan aspek khusus pemangkasan dan aplikasi
Abstrak: The study was conducted in PT National Sago Prima, Selat Panjang, Riau on February to June 2011. The study aimed to provide knowledge, skills, technique capability and management of sago palm especially in sago nursery. The method are direct for getting primary data and indirect for secondary data. Secondary data takes from interviewing and discussing with the company staff and literacy study to get more information. Generally, the primary data could get from technique activity in the field but the focus case in sago nursery. The experiment was conducted to obtain information in a nursery on the effects of trimming and organic hormone application. The experiment was arranged in Split-plot design, where the main plot was trimming on sucker petiole with three factors (without trimming (P0), trimming 20 cm above baneer (P1), and trimming 30 cm above baneer (P2)) and the subplot was four factors of application of organic hormone (without concentration (H0), concentration 1ml/l (H1), concentration 3 ml/l (H2), and concentration 5 ml/l (H3)). The result showed trimming on sucker petiole was significant difference in presentation survival rate and vegetative growth. Trimming 20 cm above baneer (P1) better than trimming 30 cm above baneer (P2) and without trimming (P0). Generally, organic hormone application didn’t show any significant difference, but organic hormone application concentration 5 ml/l (H3) was significant difference in number of sucker leaves, new leaf length, and trimming leaf wide. The interaction between treatments was significant difference in trimming leaf length and number of sucker new leaflet. Based on average value trimming 20 cm above baneer and without concentration (P1H0) showed the best result in survival rate and number of sucker leaves. The survival rate of sucker was positively correlated with the emergence of breath root. The results of this experiment showed that the hight survival rate of sucker displayed higher percentage of emergence breath root.
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Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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