Judul: The effect of packaging, storage period and invigoration on seed viability and vigor of purwoceng (pimpinella pruatjan molk) seed
Abstrak: The effect of packaging, storage period and invigoration on viability and vigor of purwoceng (Pimpinella pruatjan Molk.) seed were studied through two experiments, (1) The effect of packaging and storage period on viability and vigor of seeds in ambient and Air Condition (AC) rooms, (2) The effect of invigoration on viability and vigor of seeds. The experiments were conducted at Gunung Putri Experimental Station Cipanas, Laboratory of Seed Science and Technology IPB, Physiology Laboratory of Indonesian Medical and Aromatic Crops Research Institute (IMACRI) Bogor, from April to December 2009. The first experiment was arranged in a Nested/Hierachical Design with 2 factors and 3 replications, where package material of paper, plastic and aluminium foil, as the main plots, and storage period of 0, 2,4, 6,8, and 10 weeks, as the sub-plots. The second experiment was arranged in a Completely Randomized Design with single factor of invigoration including 11 treatments, i.e. Control, PEG 6000 (-0.2, -0.4, -0.6 and -0.8 MPa), KN03 (0.1, 0.2 and 0.3%) and GA3 (25, 50, 75 and 100 ppm). Results of the first experiment showed that plastic was the best package material for storing purwoceng seed up to 10 weeks in ambient and air condition (AC) rooms with 7.4% initial water content. In ambient room, seed vigor with seedling growth rate variable increased significantly starting from 4 weeks until 10 weeks, whereas in air condition (AC) room, viability of seed indicated by germination percentage and dry weight of normal seedling variables and seed vigor indicated by germination speed and vigor index variables, were increased starting from 2 or 4 weeks until 10 weeks. The second experiment showed that GA3 of 75 ppm and 100 ppm produced the highest speed of germination inicated that those were the best invigoration treatments for increasing seed vigor of purwoceng seed.
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Judul: Pengaruh Perlakuan Invigorasi Pada Benih Yang Berbeda Tingkat Masak Terhadap Viabilitas Dan Vigor Benih, Pertumbuhan Tanaman, Dan Hasil Kacang Bogor (Vigna subterranea (L.) Verdcourt)
Abstrak: Bambara groundnut can be cultivated in marginal land, however, its productivity is low. In order to increase the productivity, high quality of seeds must be used. Two consecutive experiments were conducted in laboratory and field at Bogor Agricultural University from April to October 2010. Seeds of three maturity levels were harvested from farmer’s field in Sukabumi, April 2010. The seeds were dried down to 11.6% moisture content before being used. The objectives of the experiments were to evaluate effects of seed invigoration applied on bambara groundnut seeds of three maturity levels on seed vigor, plant growth, and yield. Laboratory experiment was arranged in a completely randomized design while field experiment was arranged in a completely randomized block design. In both experiments, two factors were applied, seed maturity and invigoration. There were three levels of seed maturity i.e. seeds harvested at 119, 122, and 125 days after planting (dap). Seed invigoration consisted of untreated, Rhizobium sp., matriconditioning, matriconditioning plus Rhizobium sp. Matriconditioning was conducted using ratio of seeds to carrier (burned rice hull) to water of 20:12:12 (g) for 3 days in air-conditioned room ca. 25 0C. Rhizobium sp. 0.3 g/100 g seeds was either applied on seeds just before planted or incorporated in matriconditioning. Results of the laboratory experiment showed that matriconditioning alone or matriconditioning plus Rhizobium sp. applied on seeds harvested at 122 daf or 125 dap improved seed vigor (speed of germination and index of vigor). However, there was no interaction occurred between the two factors in the field experiment. Seeds treated with matriconditioning plus Rhizobium sp. or harvested at 125 dap showed the best improvement in plant growth (plant height, number of leaves, number of branches) and yields (number and weight of pods).
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Judul: Formulasi Hamiltonian untuk Menggambarkan Gerak Gelombang Soliter Dimensi Tiga di Permukaan Laut
Abstrak: Gelombang permukaan adalah gelombang yang terjadi perbedaan rapat massa antara air dan udara. Salah satu gelombang permukaan yang ditinjau adalah gelombang soliter. Formulasi gelombang soliter dilakukan dengan menggunakan formulasi Hamiltonian.
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