Judul: Pengaruh Pemberian Bioorganik terhadap Pertumbuhan Anakan Paraserianthes falcataria L (Nielsen)
Abstrak: INTRODUCTION. The problems of soil in tropical climate region are tend to be dominated by soil type that has low natural fertility and easily eroded by high sunlight intensity and precipitation, on of which is latosol soil. Latosol soil has a low natural fertility and fair chemical and physical attribute, because of that it is inappropriate to be used as plant media. To overcome this problem, bio-organic use is suggested. Bio-organic beside can activate soil microorganisms; it also can enhance root growth so that the use of bioorganic at the right concentration is hoped to fix the plant media condition and also directly increase the plant growth. MATERIALS AND METHOD. The research was conducted in IPB Faculty of Forestry Green House and Forestry Biotechnology Laboratory in December 2008- April 2009. The bioorganic product that was used was liquid-fermented with bioremedy solid-bio which was mixed with zeolit absorbent. The plant that was used was two-month aged seedling of Paraserianthes falcataria. The bioorganic treatment were B0 = Control/no bioorganic, B1 = (Liquid-Bio 1L + Zeolit 1kg) with 2gr concentrate, B2 = (Liquid-Bio 1L + Zeolit 1kg) with 5 gr concentrate, B13= (Liquid-Bio 1L + Zeolit 1kg) with 10 gr concentrate, B4 = (Liquid-Bio ½ L + Zeolit 1kg) with 2 gr concentrate, B5 = (Liquid-Bio ½ L + Zeolit 1kg) with 5 gr concentrate, B6 = (Liquid-Bio ½ L + Zeolit 1kg) with 10 gr concentrate, B7 = (Liquid-Bio ¼ L + Zeolit 1kg) with 2 gr concentrate, B8 = (Liquid-Bio ¼ L + Zeolit 1kg) with 5 gr concentrate, B7 = (Liquid-Bio ¼ L + Zeolit 1kg) with 10 gr concentrate, each treatment consisted of three repetitions whereas each repetiotion consisted of three units. The data were analyzed Complete Chaos design pattern with Minitab 14 and Costat. RESULT AND CONCLUSION. Based on various investigation testing results, bioorganic factor has no real effects on height growth, diameter, root nodules amount and total dry weight, but it has real effect on root tip ratio. Research shows that treatment B7 = (Liquid-Bio ¼ L + Zeolit 1kg) with 2 gr concentrate gives the best effect on root tip ratio with average value of 1.81. Bioorganic treatment gives no significant effects on the growth of P. falcataria due to unfavorable environment condition. P. falcataria is a pioneer, so it needs full sunlight during its growing process. Lack of sunlight and high moisture conditions cause its constant growth in every observation. Lack of sunlight and pest attack on the leaf tip due to moisture cause the photosynthesis doesn’t run at the optimum level that makes the seed growth becomes hampered. These unfavorable environment conditions are caused by the placement of seed under the shade.
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Judul: Pengaruh pemberian bio-stimulant dan mikoriza terhadap pertumbuhan semai sengon (Paraserianthes falcataria (L) Nielsen)
Abstrak: Salah satu jenis tanah marginal adalah tanah Podsolik Merah Kuning. Masalah tanah ini adalah reaksinya yang masam (pH rendah), kandungan Alumunium tinggi dan unsur hara rendah. Beberapa teknologi yang dicobakan untuk mengatasi kendala-kendala pada tanah marginal tersebut antara lain: pemanfaatan mikroorganisme yang dapat mendukung pertumbuhan tanaman, dan aplikasi bio-nature yang dapat menstimulir perkembangan tanaman dan mikroorganisme. Penelitian ini bertujuan untuk menentukan tingkat konsentrasi dan waktu pemberian bio-nature pada pertumbuhan semai Paraserianthes falcataria, dan untuk mengetahui pengaruh bio-nature terhadap tingkat infeksi Cendawan Mikoriza Arbuskula (CMA) pada akar semai P. falcataria. Dihipotesakan bahwa inokulasi CMA dan pemberian bio-nature dapat meningkatkan pertumbuhan semai Paraserianthes falcataria. Variabel yang diukur dan diamati untuk mengetahui respon pertumbuhan semai Paraserianthes falcataria dan perkembangan mikoriza adalah tinggi, diameter, berat kering total, nisbah pucuk akar, dan tingkat infeksi akar oleh mikoriza. Bio-nature yang digunakan adalah campuran Bio-nature Custom dan Bio-nature Calcium dengan perbandingan 50% 50%. Pemberian bio-nature dilakukan dengan cara disemprotkan ke daun sebanyak lebih kurang 7 ml/bibit, dimana penyemprotan dilakukan setelah kotiledon jatuh dengan konsentrasi dan waktu pemberian yang berbeda yaitu: Tanpa pemberian bio-nature (kontrol). konsentrasi 30 cc/l, konsentrasi 60 cc/l, dan konsentrasi 120 cc/l. Pemberian bio-nature dilakukan pada minggu pertama, minggu ketiga, minggu kelima, dan ketujuh setelah penyapihan. Analisis data dilakukan secara statistik dengan menggunakan rancangan petak-petak terbagi dalam tiga faktor yaitu faktor mikoriza. konsentrsi bio-nature, dan waktu pemberian bio-nature (dengan masing-masing kombinasi perlakuan diulang 25 kali). Pada perlakuan yang berpengaruh nyata terhadap variabel yang diukur. selanjutnya dilakukan uji nilai tengah kuadrat terkecil untuk mengetahui kombinasi yang terbaik....
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Judul: Grup dan Homomorfisma Grup pada Rubik Revenge
Abstrak: Rubik cube is a kind of puzzle game. A player must arrange rubik sides, which have been disordered, back to the position where every side has the same colour. This paper does not focus on the settlement solution, but instead on proving the existence of a group homomorphism between rubik movement group and S96 symmetric permutation group in rubik revenge. Firstly, it has been proved that rubik movement set is a group. Then, it also has been proved that the M set, which contains numeric labels of 1 until 96 in cubinos sides, is S96 symmetric permutation group.
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