Judul: Uji Laboratorium Microfertilizers Untuk Perkecambahan Benih Jelutung Rawa dan Padi
Abstrak: Deforestasi lahan gambut telah menyebabkan berbagai bencana ekologis bagi lingkungan. Program rehabilitasi menggunakan penanaman spesies adaptif jelutung rawa (Dyera polyphylla) dan padi Inpara 2 (Oryza sativa), serta pemupukan diperlukan sebagai upaya percepatan pemulihan ekosistem gambut. Penelitian ini bertujuan untuk memproduksi formula pupuk mikro berbasis limbah kelapa sawit dan menganalisis pengaruh aplikasi pupuk mikro terhadap perkecambahan jelutung dan benih padi. Pupuk yang digunakan berupa mikrokarbon teraktivasi (MT), mikrokarbon non aktivasi (MNT), mikrolignoselulosa (ML), dan mikrokristalin (MK) yang berasal dari biomassa kelapa sawit dengan konsentrasi 1%, 3%, 5%, dan 7%. Penelitian ini menunjukan bahwa pupuk berpengaruh signifikan terhadap semua parameter dalam uji perkecambahan rawa jelutung dan berpengaruh signifikan terhadap sebagian besar parameter uji perkecambahan padi, kecuali parameter laju perkecambahan. Perlakuan MK 5% menghasilkan perkecambahan jelutung rawa terbaik, sedangkan MNT 1% menghasilkan perkecambahan padi terbaik., Peatland deforestation has caused various ecological disasters for the environment. The rehabilitation program uses the planting of adaptive species of swamp jelutung (Dyera polyphylla) and Inpara 2 paddy (Oryza sativa), as well as fertilization as an effort to accelerate the recovery of the peat ecosystem. This research aimed to produce microfertilizers formula based on palm oil waste and analyze the effect of microfertilizer application on the germination of swamp jelutung and paddy seeds. The fertilizers used are activated microcarbon (MT), non-activated microcarbon (MNT), microlignocellulose (ML), and microcrystalline (MK) derived from oil palm biomass with concentrations of 1%, 3%, 5%, and 7%. Fertilizers application significantly affected all parameters in the swamp jelutung germination test and significantly impacted most of the rice germination test parameters, except for the Mean Germination Time parameter. The MK 5% treatment produced the best germination of swamp jelutung, while MNT 1% produced the best paddy germination.
Keyword: jelutung, microfertilizers, paddy, peat soil

Judul: Application of Microfertilizers for the Growth of Swamp Jelutong (Dyera polyphylla (Miq.) Steenis) and Rice (Oryza Sativa L.) on Peat Soil
Abstrak: Degradasi dan deforestasi lahan gambut memerlukan rehabilitasi melalui penanaman spesies adaptif dan aplikasi pupuk. Jelutung rawa (Dyera polyphylla) dan padi varietas Inpara-2 (Oryza sativa) merupakan tanaman adaptif di lahan gambut yang dapat digunakan dalam rehabilitasi. Microfertilizers berbasis limbah kelapa sawit memiliki potensi untuk memperbaiki unsur hara tanah. Tujuan dari penelitian ini adalah i) membuat formula microfertilizers berbasis limbah kelapa sawit, ii) menganalisis aplikasi microfertilizers terhadap unsur hara tanah gambut, dan iii) menganalisis aplikasi pupuk mikro terhadap pertumbuhan tanaman jelutung rawa dan padi di tanah gambut. Rancangan percobaan menggunakan Rancangan Acak Lengkap (RAL) dengan 1 faktor dan 3 ulangan. Faktor tersebut adalah jenis pupuk mikro yang terdiri dari mikro karbon teraktivasi (MT), mikro karbon tidak teraktivasi (MNT), mikro lignoselulosa (ML), mikro selulosa kristal (MK) dengan konsentrasi 1%, 3%, 5%, dan 7%. Terjadi peningkatan pH tanah gambut (pH 7,70- 7,80) dan kandungan NPK. Pemberian 7% MT menghasilkan pertumbuhan terbaik pada jelutung rawa, sedangkan pemberian 3% MNT menghasilkan pertumbuhan terbaik pada padi., Peatland degradation and deforestation require rehabilitation through adaptive species planting and fertilizer application. Swamp jelutung (Dyera polyphylla) and Inpara-2 variety paddy (Oryza sativa) are adaptive plants in the peatland that can be used in rehabilitation. Oil palm waste-based microfertilizers have the potency to improve soil nutrients. The objectives of this research were i) to make a formula for oil palm waste-based microfertilizers, ii) to analyze the application of microfertilizers to the peat soil nutrition, and iii) to analyze the application of microfertilizers to the growth of swamp jelutung and paddy in peat soil. The experimental design used a completely randomized design (CRD) with 1 factor and 3 replications. The factor was the type of microfertilizers consisted of activated micro-carbon (MT), non-activated micro-carbon (MNT), microlignocellulose (ML), Micro-crystalline cellulose (MK) with concentrations of 1%, 3%, 5%, and 7%. There was an increase in the pH of the peat soil (pH 7,70-7,80) and NPK content. The 7% MT resulted in the best growth in Swamp jelutung while 3% MNT resulted in the best growth in paddy.
Keyword: adaptive species, oil palm waste, peat, survival rate

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