Judul: Pengayaan pupuk organik dengan pupuk hayati untuk meningkatkan efisiensi penggunaan hara, pertumbuhan, dan produksi tanaman cabai, The Enrichment of Organic Fertilizer with Biofertilizer to Improve Nutrient Use Efficiency, Growth, and Yield of Red Chili).
Abstrak: Red chili production in Indonesia is low due to low soil productivity. Soil productivity can be increased by using biofertilizer. Biofertilizer can improve plant growth, yield, and soil quality. The aim of this study was to study influence of enriched compost and ordinary compost to increase nutrient use efficiency, growth, and yield of red chili. This study used biofertilizer which consisted of Bacillus subtilis (strain HU48), Pseudomonas beteli (strain ATCC1986IT), Azotobacter sp. (strain HY1141), and Azospirillum sp. (strain NS01). The experiment was conducted in the field using randomized block design (RBD) with two factors and three replications. The first factor was organic fertilizer that consisted of ordinary compost (O1), enriched compost (O2), and compost added biofertilizer when planted (O3). The second factor was inorganic fertilizer that consisted of 50% dosage of NPK and 100% dosage of NPK. The plants were grown on plots of 3 m x 3 m with a plant distance about 50 cm x 60 cm. The observed parameters were nutrient use efficiency, plant growth, and yield. The results showed that biofertilizer increased plant nutrient uttilization efficiency, plant growth, and yield by 65 %, 59%, and 126%, respectively. The combination of enriched compost and 50% dosage of NPK (O2A1) had the highest plant nutrient uttilization efficiency, plant growth, and yield than the other treatment.
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Judul: Efektivitas Penggunaan Pupuk Organik yang diperkaya Mikrob Aktivator dalam Mengatur Keseimbangan Tajuk dan Akar Tanaman Cabai (Capsicum annuum. L)
Abstrak: The aim of this research was to evaluate the effect of enriched biofertilizer in some dosed for balancing shoot and root growth of red chili (Capsicum annuum. L) to support productivity and for biocontrol of pest and disease. The activator microbes used in this research belongs to Plant Growth Promoting Rhizobacteria (PGPR), consist of : Azospirillum sp. (Strain NS01), Azotobacter sp. (Strain HY1141), Bacillus subtilis (Strain HU48), and Pseudomonas beteli (Strain ATCC1986IT). The experiment was carried out in green house by Completley Randomize Design Method that consist of 6 treatments and 9 replications. The treatments were soil with unriched biofertilizer in 2:1 dosed (P1), soil with enriched biofertilizer in 2:1 dosed (P2), soil with unriched biofertilizer in 3:1 dosed (P3), soil with enriched biofertilizer in 3:1 dosed (P4), soil with anorganic fertilizer (NPK) and soil without any fertilizer (Ko). The result showed that application of enriched biofertilizers by activator microbes increased macro nutrients C, N, P, K, Ca and Mg in biofertilizers, increased growth and balancing of red chili. Application of enriched biofertilizers also increased imunity of red chili from pest and disease.
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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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