Judul: Arbuscular Mycorrhizal Symbiosis of Upland Rice  Intercropped with Shallots
Abstrak: IKHSANNUL AMAL. Mikoriza Arbuskula pada Padi Gogo Tumpang Sari dengan Bawang Merah. Dibimbing oleh NAMPIAH SUKARNO dan AHMAD JUNAEDI Aplikasi cendawan mikoriza arbuskula (CMA) merupakan salah satu upaya untuk meningkatkan produktivitas padi gogo. Penelitian ini bertujuan menganalisis pengaruh CMA dan sistem tanam terhadap pertumbuhan vegetatif serta produktivitas padi dan bawang merah. Penelitian menggunakan rancangan acak lengkap (RAL) dengan satu faktor yaitu kombinasi sistem tanam padi dengan bawang merah dan inokulasi CMA. Parameter yang diamati pada padi dan bawang merah ialah persentase kolonisasi CMA, tinggi tanaman, jumlah daun, volume dan bobot akar, sedangkan untuk padi terdapat parameter lain yaitu jumlah anakan, bobot batang, helai daun, seludang daun, dan malai, nilai SPAD, kerapatan malai, jumlah butir, persentase gabah isi dan gabah hampa, bobot 100 butir, indeks panen, dan rasio tajuk:akar. Hasil penelitian menunjukkan kombinasi CMA dan sistem penanaman tidak memengaruhi pertumbuhan vegetatif tetapi memengaruhi beberapa parameter pertumbuhan generatif tanaman padi seperti bobot malai, persentase gabah isi, indeks panen dan persentase gabah hampa. Kolonisasi CMA pada padi yang ditumpangsarikan dengan bawang merah yang diinokulasi CMA meningkatkan rasio tajuk:akar padi dan tinggi tanaman bawang merah., IKHSANNUL AMAL. Arbuscular Mycorrhizal Symbiosis of Upland Rice Intercropped with Shallots. Supervised by NAMPIAH SUKARNO and AHMAD JUNAEDI Arbuscular mycorrhizal fungal (AMF) application is one of the efforts to increase the upland rice productivity. This study aimed to analyze the effect of AMF application and planting system on the vegetative growth and productivity of rice and shallots. This study used a completely randomized design with one factor, namely a combination of rice planting system with shallots and AMF inoculation. The parameters measured in rice and shallots were plant height, number of leaves, volume and weight of root. Meanwhile, for rice there were additional parameters observed namely number of tillers, weight of stem, leaf blade, leaf sheath, and panicle, SPAD value, panicle density, number of grains, percentage of filled and empty grains, weight of one hundred grains, harvest index, and shoot:root ratio. The results showed that the combination of AMF application and planting system did not affect vegetative growth but did affect several parameters of generative growth of rice such as panicle weight, percentage of filled grain, harvest index and percentage of empty grain. AMF colonization in intercropped rice and shallots increased shoot:root ratio and shallots plant height.
Keyword: AMF, panicle weight, percentage of filled grain, percentage of root colonization, shoot:root ratio

Judul: Respon Pertumbuhan dan Produksi Beberapa  Varietas Padi (Oryza sativa L.) pada Inokulasi  Cendawan Mikoriza Arbuskula (CMA)
Abstrak: Aplikasi cendawan mikoriza arbuskula (CMA) sebagai pupuk hayati merupakan salah satu upaya untuk meningkatkan produktivitas padi. Penelitian ini bertujuan mempelajari respon inokulasi CMA pada varietas padi IPB 3S, Ciherang, Jatiluhur dan IPB 9G. Penelitian menggunakan rancangan acak lengkap (RAL) dengan dua faktor, yaitu inokulasi CMA dan 4 varietas tanaman padi. Benih yang telah diinokulasi disemai dan dipelihara selama 14 hari, kemudian dipindahkan ke dalam pot dan dipelihara di rumah kaca selama 19 minggu setelah semai (MSS). Pengamatan parameter vegetatif dilakukan pada umur yang berbeda. Tinggi tanaman dilakukan pada umur 9, 14 dan 19 MSS, jumlah daun pada umur 9, dan 14 MSS, jumlah anakan pada umur 14, dan 19 MSS, jumlah malai pada umur 19 MSS. Pada umur 19 MSS dilakukan pengataman vegetatif berupa tinggi tanaman, jumlah anakan, jumlah malai, kolonisasi CMA, dan parameter generatif seperti volume dan bobot kering akar, bobot kering batang, bobot kering daun, bobot kering malai, jumlah gabah, persentase gabah isi, dan indeks panen. Hasil pengamatan menunjukkan perlakuan CMA pada tanaman padi meningkatkan pertumbuhan vegetatif seperti tinggi tanaman, jumlah anakan umur 14 MSS, jumlah daun dan jumlah malai. CMA mampu meningkatkan produksi tanaman padi pada karakter bobot kering malai, jumlah gabah isi, total jumlah gabah, persentase gabah isi, dan indeks panen. Varietas padi baik yang diinokulasi CMA maupun tidak, meningkatkan pertumbuhan tinggi tanaman, jumlah anakan umur 14 MSS, jumlah daun, bobot malai, bobot batang, bobot daun, jumlah, gabah isi, dan total jumlah gabah. Setiap varietas padi memiliki respon yang sama terhadap inokulasi CMA, Application of arbuscular mycorrhizal fungi (AMF) as a biofertilizer is one of the efforts to enhance rice productivity. This study aimed to investigate the response of AMF inoculation on the rice varieties namely IPB 3S, Ciherang, Jatiluhur, and IPB 9G. The research employed a completely randomized design (CRD) with two factors, vis AMF inoculation and four varieties of rice plants. Inoculated seeds were germinated and maintained for 14 days, then transferred to pots and grown in a greenhouse for 19 weeks after sowing (WAS). Observations of vegetative parameters were conducted at different stages. Plant height was measured at 9, 14, and 19 WAS, number of leaves at 9 and 14 WAS, number of tillers at 14 and 19 WAS, and number of panicle at 19 WAS. At 19 WAS, vegetative measurements such as plant height,number of tillers, number of panicle, root colonization by AMF and rice, as well as generative parameters including root volume and dry weight, stem dry weight, leaf dry weight, panicle dry weight, number of grains, percentage of filled grains, and harvest index were recorded. The results showed that AMF treatment in rice plants enhanced vegetative growth, such as plant height, number of tillers at 14 WAS, number of leaves, and number of panicle at 19 WAS. AMF also increased rice plant production in terms of panicle dry weight, number of filled grains, total grain number, percentage of filled grains, and harvest index. Both AMF-inoculated and non-inoculated rice varieties exhibited similar responses in terms of plant height, number of tillers at 14 WAS,number of leaves, panicle weight, stem weight, leaf weight, number
Keyword: AMF treatment, filled grain, harvest index, number of panicles

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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