Judul: Suplementasi Pupuk Kandang Ayam Broiler dalam Mendukung Produktivitas Rumput Brachiaria decumbens di UP3 Jonggol  IPB
Abstrak: Tujuan dari penelitian ini adalah mengevaluasi dosis suplementasi pupuk kandang ayam broiler terhadap produktivitas rumput Brachiaria decumbens. Penelitian dilaksanakan di UP3 Jonggol IPB. Penelitian dilakukan dengan menggunakan Rancangan Acak Lengkap (RAL) dengan 5 perlakuan dan 4 ulangan, yaitu P1 = urea 150 kg ha-1 , P2 = 5 ton ha-1 pupuk kandang ayam broiler + urea 75 kg ha-1 , P3 = 10 ton ha-1 pupuk kandang ayam broiler + urea 75 kg ha-1 , P4 = 15 ton ha-1 pupuk kandang ayam broiler + urea 75 kg ha-1 dan P5 = 20 ton/ha pupuk kandang ayam broiler + urea 75 kg ha-1 . Hasil penelitian menunjukkan dosis terbaik untuk produktivitas rumput Brachiaria decumbens adalah 20 ton ha-1 pupuk kandang ayam broiler dan 75 kg ha-1 pupuk urea. Dosis dari pupuk kandang ayam broiler sampai 20 ton ha-1 adalah yang terbaik dalam menghasilkan biomassa tanaman, peningkatan jumlah tunas, jumlah stolon, dan panjang stolon. Peningkatan dosis pupuk kandang ayam broiler berkorelasi positif terhadap produksi biomassa rumput Brachiaria decumbens dengan R² = 0.98., The aim of this research were to evaluate the supplementation dose of chicken manure given towards the productivity of Brachiaria decumbens. These experiment was conducted in Jonggol Animal Science Teaching and Research Unit (JASTRU) IPB. This research was designed by using Completely Randomized Design (CRD) with 5 treatments and 4 replications, namely P1 = urea 150 kg ha-1 , P2 = 5 tons ha-1 of broiler manure + urea 75 kg ha-1 , P3 = 10 tons ha-1 of broiler manure + urea 75 kg ha-1 , P4 = 15 tons ha-1 of broiler manure + urea 75 kg ha-1 and P5 = 20 tons ha-1 of broiler manure + urea 75 kg ha-1 . The results showed the best dose to support the productivity of Brachiaria decumbens is 20 tons ha-1 of broiler manure and 75 kg ha-1 of urea. The dose of broiler manure up to 20 tons ha-1 is the best in producing plant biomass, increasing the number of shoots, number of stolons, and stolon length. Increasing the dose of broiler manure has a positive correlation with the biomass production of Brachiaria decumbens grass with R² = 0.98.
Keyword: Brachiaria decumbens, broiler chicken manure, productivity, up3 jonggol

Judul: Optimization of Chicken Manure Fertilizer (Broiler) in  Supporting Productivity of Brachiaria humidicola in Jonggol Animal Science  Teaching and Research Unit (JASTRU)
Abstrak: Penelitian ini bertujuan untuk mengukur dosis pupuk kandang ayam yang memberikan hasil yang terbaik terhadap produktivitas rumput Brachiaria humidicola. Penelitian ini dilaksanakan di Unit Pendidikan dan Penelitian Peternakan Jonggol (UP3J). Penelitian dilakukan dengan menggunakan rancangan acak lengkap dengan pola petak terbagi (RAL split plot) dengan 5 perlakuan dan 4 ulangan, yaitu P1 = urea 150 kg ha-1, P2 = 5 ton ha-1 pupuk kandang ayam + urea 75 kg ha-1, P3 = 10 ton ha-1 pupuk kandang ayam + urea 75 kg ha-1, P4 = 15 ton ha-1 pupuk kandang ayam + urea 75 kg ha-1 dan P5 = 20 ton ha-1 pupuk kandang ayam + urea 75 kg ha-1. Hasil penelitian menunjukkan pupuk kandang ayam efektif meningkatkan jumlah tunas, jumlah stolon, panjang stolon, tinggi tanaman, produksi biomassa individu tanaman, warna tanah serta warna daun rumput Brachiaria humidicola. Dosis optimal dalam mendukung produktivitas rumput Brachiaria humidicola sebesar 20 ton ha-1 pupuk kandang ayam dan 75 kg ha-1 pupuk anorganik urea. Peningkatan dosis pupuk kandang ayam berkorelasi positif terhadap produksi biomassa rumput Brachiaria humidicola., The aim of this research were to measure the dose of chicken manure fertilizer that gives the best results on the productivity of Brachiaria humidicola. These experiment were conducted at Jonggol Animal Science Teaching and Research Unit (JASTRU). This research was designed by using split-plot design with 5 treatments and 4 replications, namely P1 = urea 150 kg ha-1, P2 = 5 tons ha-1 of chicken manure fertilizer + urea 75 kg ha-1, P3 = 10 tons ha-1 of chicken manure fertilizer + urea 75 kg ha-1, P4 = 15 tons ha-1 of chicken manure fertilizer + urea 75 kg ha-1 and P5 = 20 tons ha-1 of chicken manure fertilizer + urea 75 kg ha-1. The results showed that chicken manure fertilizer was effective in increasing the number of shoots, number of stolons, stolon length, plant height, individual plant biomass production, soil color and leaf color of Brachiaria humidicola. The optimal dose to support the productivity of Brachiaria humidicola is 20 tons ha-1 of chicken manure fertilizer and 75 kg ha-1 of urea. Increasing the dose of chicken manure fertilizer was positively correlated to the biomass production of Brachiaria humidicola.
Keyword: Brachiaria humidicola, chicken manure fertilizer, productivity, UP3J

Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology