Judul: Percepatan pematahan dormansi subang gladiol (Gladiolus hybridus) dengan aplikasi zat pengatur tumbuh
Abstrak: The main constraint of gladiolus cut flower production is the limited planting material. The availability of ready to plant corms is hindered by the long period of dormancy. The objective of the research was to ivestigate the effect of plant growth regulators (PGR) in breaking the dormancy of gladiolus corms cv. Nabila. The first experiment was carried out in two steps. In the first step NAA was combined with BAP. The concentration of NAA were 0, 50, 100, 150 ppm whereas BAP were 0, 50 100, 150 ppm. In the second step GA3 was combined with BAP. The concentration of GA3 were 0, 50, 100, 150 ppm whereas BAP were 0, 50 100, 150 ppm. The Randomized Complete Block Design with one factor was used in the first experiment with five replication. In the second experiment the best combination of PGR from the first experiment were selected and applied to corms with different storage periode (0, 2, 4, 6, 8 weeks). The Randomized Complete Block Design with two factor and five replication was used. The results of the first experiment showed that all treatment using NAA, GA3, BAP hastened the rooting and sprouting of the corms therefore breaking the dormancy. Considering the efficiency of dormancy breaking techniques, the treatment NAA 100 ppm and GA3 50 ppm were selected for the second experiment. The results of the second experiment showed that NAA 100 ppm and GA 50 ppm were similarly effective for breaking dormancy of the corms. The newly harvested and two weeks old corms rooted and sprouted earlier than the corms that had been longer in storage.
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Judul: Pengaruh GA3, Ethrel dan kombinasi GA3, Ethrel dengan Sitacinin dan cycocel terhadap pertumbuhan dan perkembangan tanaman Gladiolus hybridus
Abstrak: Penelitian ini bertujuan untuk mengetahui pengaruh perlakuan GA3, Ethrel, dan kombinasi GA3, Ethrel dengan Sitokinin dan Cycocel terhadap pertumbuhan dan pembungaan Gladiol11s hybridus. Percobaan ini merupakan percobaan lapangan yang dilaksanakan di Kebun Percobaan di Balai Penelitian Hortikultura Cipanas UPT Sindanglaya pada ketinggian 1100 m di atas permukaan laut. Dimulai awal Juli 1989 hingga awal April 1990. Percobaan ini adalah percobaan non faktorial dengan menggunakan Rancangan Acak Kelompok (RAK). Terdapat 9 perlakuan masing-masing diulang 3 kali, sehingga seluruhnya ada 27 petak percobaan. Perlakuan itu terdiri dari A (tanpa zat pengatur tumbuh), B (Giberelin), C (Ethrel), D (Giberelin + Sitokinin), E (Ethrel + Sitokinin), F (Giberelin + Cycocel), G (Ethrel + (Cycocel), H (Giberelin + Sitokinin + Cycocel), I (Ethrel + Sitokinin + Cycocel). Pemberian zat pengatur tumbuh dengan cara perendaman corm selama 1 jam, pada pemberian lebih dari satu zat pengatur tumbuh, pemberian zat pengatur tumbuh kedua dilakukan satu jam sesudah pemberian zat pengatur tumbuh yang pertama selama 1 jam. Pada perlakuan H dan I pemberian Cycocel dilakukan satu minggu sesudah pemberian zat pengatur tumbuh yang kedua. ...
Keyword: Gladiolus hybridus, Plant growth regulators, Ethrel

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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