No abstract

Canna indica L (African arrowroot), is a beneficial, multi-use tropical perennial with a worldwide distribution, but relatively unexplored. This plant has the potential to be developed as a food crop in an intercropping system, utilizing idle land under commercial plantations such as rubber or teak. This study aimed to determine the best light-growing conditions for C. indica. A completely randomized design was used with growth light as the treatment consisting of 25%, 50%, and 100% of natural light, respectively. Leaf traits, growth characteristics, and phenotypic plasticity were used to measure C. indica’s response to different treatments. The results of this study showed that C. indica grown in low light has the best growth with increased height, leaf area, root and shoot dry weights, but decreased leaf thickness, which caused the increase in specific leaf area, leaf area ratio, and leaf weight ratio, but decreased root to shoot ratio. Based on leaf traits and biomass allocation, the phenotypic plasticity index was 0.23, a typical number for shade tolerant species. These findings were the first time to be reported for C. indica. For agroforestry practices, it can be recommended that C. indica be used as an intercropping plant under tree canopies.

<p><em>Merdeka Belajar Kampus Merdeka (MBKM) merupakan salah satu program yang dilakukan pemerintah untuk meningkatkan kualitas pendidikan di Indonesia. Program tersebut terdiri dari 8 kegiatan yang dapat mengasah kompetensi hard skills maupun soft skills mahasiswa. Beberapa kegiatan Program MBKM telah dilakukan di Program Studi Biologi Universitas Al-Azhar Indonesia (Prodi Biologi UAI), yaitu program pertukaran pelajar, program asistensi mengajar dan program magang bersertifikat. Penelitian ini bertujuan untuk menjelaskan hasil evaluasi respons mahasiswa terhadap Program MBKM mandiri Prodi Biologi UAI. Penelitian dilakukan dengan metode kuantitatif menggunakan survey untuk mengetahui respons dari mahasiswa baik yang belum dan sudah melaksanakan Program MBKM. Hasil evaluasi respons mahasiswa menunjukan bahwa mahasiswa Prodi Biologi UAI sering mendengar istilah MBKM dan mengetahui bahwa Prodi Biologi UAI menyelenggarakan Program MBKM. Sebagian mahasiswa Prodi Biologi UAI yang belum mengikuti Program MBKM sangat berminat untuk bergabung, dan mahasiswa yang telah mengikuti Program MBKM merasa sangat puas dan ingin mengikuti program lainnya.</em></p><p><em><strong>Kata Kunci</strong> – MBKM, Prodi Biologi Universita Alzhar Indonesia, Respon</em></p>

<p><em>Abstrak</em> - <strong>Spirulina sp. merupakan mikroalga yang mengandung antioksidan, phytonutrient, probiotik dan nutraceuticals yang dapat meningkatkan kandungan protein makanan dengan pencampuran biomassa Spirulina sp. kering dengan tepung ganyong atau biasa disebut Cannalina. Peningkatan penggunaan tepung ganyong dapat meningkatkan limbah tajuk tanaman ganyong yang tidak ikut terolah menjadi tepung. Pemanfaatan limbah tajuk ganyong tersebut dapat diolah menjadi pupuk organik yang dapat dimanfaatkan menjadi media tumbuh mikroalga khususnya Spirulina sp.. Tujuan dari penelitian ini adalah untuk melihat pengaruh pertumbuhan Spirulina sp. terhadap pemberian pupuk organik hasil fermentasi limbah tajuk tanaman Ganyong sebagai media tumbuh. Penelitian ini akan dilakukan dengan pembuatan pupuk organik cair, persiapan bibit kultur Spirulina sp., persiapan media tumbuh dan analisa pertumbuhan dari Spirulina sp.. Penelitian ini diharapkan dapat memperoleh luaran berupa publikasi pada jurnal nasional terakreditasi. Pupuk cair organik yang dihasilkan dari fermentasi tajuk tanaman ganyong telah memenuhi kriteria pupuk organik cair yang yang diterbitkan pada Peraturan Menteri Pertanian NO:37/Permentan/SR.130/5/2010 sehingga dapat diaplikasikan pada tanaman. Laju pertumbuhan dan produksi biomassa Spirulina sp. mencapai angka tertinggi pada konsentrasi media pupuk organik 14 mL/L. Penggunaan pupuk organik cair dari tajuk tanaman Ganyong berpotensi menjadi alternatif bahan media pertumbuhan Spirulina sp.</strong></p><p><em>Abstract</em> – <strong>Spirulina sp. is a microalga that contains antioxidants, phytonutrients, probiotics, and nutraceuticals that can increase the protein content of food by mixing the dried Spirulina sp. with Ganyong flour which is called Cannalina. Increasing the use of Ganyong flour can increase waste from the plant shoot that is not processed into flour. Utilization of the shoot waste can be processed into organic fertilizer which can be used as a growing medium for Spirulina sp. The objective of this study is to find the effect of Spirulina sp. growth on the organic fertilizer medium that is resulting from Ganyong shoot fermentation. This research will be carried out by making liquid organic fertilizer, preparation of Spirulina sp. culture stock, growth media, and growth analysis. Organic liquid fertilizer produced from the Ganyong shoot fermentation has met the criteria for liquid organic fertilizer published in Minister of Agriculture Regulation NO: 37 / Permentan / SR.130 / 5/2010 so that it can be applied to plants. The growth rate and biomass production of Spirulina sp. reached the highest rate at 14 mL / L organic fertilizer media concentration. The use of liquid organic fertilizer from Canna plant shoot has the potential to be an alternative growth medium for Spirulina sp..</strong></p><p><em><strong>Keywords</strong> - Spirulina sp., Microalgae, Ganyong, Waste, Pupuk Organik Cair</em></p>

Composition of soil microbiomes plays important ecological roles and vital ecosystem processes in nature of soil. Indeed, interaction between plant root, microbes, and soil influences significantly biologically, physically and chemically of soil properties. In this study, high throughput sequencing of 16S rRNA gene of soil bacteria using Illumina platform was performed for analyzing composition, richness and biodiversity of soil bacteria in two different soil conditions. Two soil samples from Rubber tree – Canna indica intercropping areas and two soil samples from area without C. indica were collected and analyzed the diversity and richness of soil bacterial communities. Bioinformatic data analysis showed in average more than 5500 bacterial OTU were identified in each soil samples. Relative abundance of individual OTU between soil with and without C. indica showed statistically no difference. From 30 phyla that have been identified in both soil conditions, only 5 phyla (BH180.139, Cyanobacteria, Proteobacteria, TM6, and WS3) showed a statistically different (p < 0.05) in their abundance. A total 270 and 355 Familia and Genus respectively were identified. There is no statistically difference in richness, abundance and diversity of species between both soil conditions. However, intercropping soil with C. indica showed lower species abundance in comparison with soil without C. indica (ACE index 112 and 125, 6 respectively). In contrast, soil with C. indica has more taxa richness in comparison with soil without C. indica (Fisher index 278 and 230, 4, respectively).