Judul: Upaya Konservasi Eksitu Gelam (Melaleuca cajuputi) dan Perbanyakan Generatif pada Tanah Gambut
Abstrak: Gelam (Melaleuca cajuputi) merupakan spesies adaptif gambut yang memiliki nilai manfaat tinggi, namun populasinya saat ini sudah mulai berkurang. Kemelimpahan manfaat suatu tanaman berkolerasi dengan tingginya penggunaan tanaman, sehingga diperlukan upaya pelestarian agar M. cajuputi tidak punah. Tujuan dari penelitian ini adalah menganalisis pustaka ilmiah mengenai upaya konservasi eksitu gelam dan respon pertumbuhan gelam terhadap pemberian pupuk berbahan dasar limbah kelapa sawit. Metode yang digunakan adalah analisis bibliometrik dan desain percobaan rancangan acak lengkap dengan dengan faktor pupuk, yakni mikrokarbon teraktivasi (MT), mikrokarbon non-teraktivasi (MNT), mikrolignoselulosa (ML), dan mikrokristalin selulosa (MK) dengan konsentrasi 1%, 3%, 5%, dan 7%. Berdasarkan analisis bibliometrik dengan kata kunci tren publikasi mengalami peningkatan dari tahun 2019-2023. Kata kunci yang paling sering ditemukan yaitu Melaleuca cajuputi, climate change, dan essential oil. Network visualization memetakan kata kunci “palm oil” yang tidak memiliki hubungan dengan kata kunci lainnya. Potensi penelitian terhadap pemanfaatan limbah yang dihasilkan kelapa sawit terhadap upaya konservasi eksitu gelam menjadi peluang penelitian terbaharukan. Hasil penelitian menunjukkan bahwa aplikasi MNT7% memberikan respon pertumbuhan gelam terbaik dibandingkan perlakuan lainnya., Gelam (Melaleuca cajuputi) is an adaptive species found in peat swamps with high beneficial value, but its population is currently declining. The abundance of benefits from a plant correlates with its high usage, hence conservation efforts are needed to prevent M. cajuputi from becoming extinct. The aim of this research is to analyze scientific literature on ex situ conservation efforts of gelam and its growth response to fertilizer derived from oil palm waste. The methods employed include bibliometric analysis and a completely randomized design experiment with fertilizer factors: activated microcarbon (MT), non-activated microcarbon (MNT), microlignocellulose (ML), and microcrystalline cellulose (MK) at concentration of 1%, 3%, 5%, and 7%. According to bibliometric analysis, publication trends have increased from 2019 to 2023. The most frequently found keywords are Melaleuca cajuputi, climate change, and essential oil. Network visualization mapped the keyword "palm oil," which showed no connection with other keywords. Research potential on utilizing oil palm waste for ex situ conservation efforts of gelam presents a promising avenue for further investigation. The study's results indicate that the application of MNT 7% yielded the best growth response in gelam compared to other treatments.
Keyword: microfertilizers, Analisis bibliometrik, konservasi eksitu, limbah kelapa sawit

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: Construction of Strongly Optimal Binary Linear Code with Minimum Distance 9 and 11
Abstrak: A binary linear code of length n over q F is a subspace of n q F . A code has three parameters that attached to it, namely length, dimension, and minimum distance. A code with length n, dimension k and minimum distance d is often called [n, k, d ]-code. Usually, when two parameters are given, then we want to find a code that has the best value for the last parameter. Based on Gilbert- Varshamov bound, if a [n, k, d ]-code exists and can not be expanded, we call it a strongly optimal code. In this paper, we construct strongly optimal code with minimum distance 9 and 11. In constructing the code, we created a theorem and algorithm based on Gilbert-Varshamov bound before we implement the algorithm to MAPLE programming language. Because of computational limitations, the program can only construct up to k = 10 for d = 9 and k = 12 for d = 11.
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