Abstract. Prayoga GP, Aini SN, Mustikarini, ED, Rosalin Y. 2020. Diversity of black pepper plant (Piper nigrum L.) in Bangka Island (Indonesia) based on agro-morphological characters. Biodiversitas 21: 652-660. Black pepper (Piper nigrum L.) production in Bangka Belitung Islands Province continued to decrease in 2014-2017. Efforts to increase black pepper production was carried out by providing superior varieties that began with an increase in the genetic diversity of black pepper plants. Increasing the genetic diversity of black pepper can be done through black pepper germplasm exploration activities followed by characterization. The research aimed to obtain the agro-morphological characteristics of black pepper plants in Bangka island. Exploration was carried out by survey method in four regencies in Bangka Island. The research method used a survey method with convenience sampling technique. Observation of agro-morphological characters was carried out in accordance with the descriptor for black pepper from IPGRI (1995). The results of exploration of black pepper plants in Bangka Island have found 9 accessions of black pepper plants, consisting of 5 cultivars were Lampung Daun Lebar (LDL), Lampung Daun Kecil (LDK), Chunuk, and Jambi and 4 landraces namely Bogor, Peremis, Keriwil, and Merapin Daun Kecil (MDK). There were morphological differences in 9 accessions of black pepper plants, namely leaf lamina shape, leaf vein, leaf margin, lateral branch habit, leaf base shape, ripe fruit color, hanging vines, ground vines, and stem shape. Agro-morphological relationship of 9 accessions of black pepper plants can be divided into 5 clusters at a 50% similarity level. Based on this study, black pepper breeding program on Bangka Island could be done accessions of Peremis, Bogor, Nyelungkup, and Jambi as genetic sources. Furthermore, selection would be better to use length of petiole, length of stem segment, fruit size, percentage of perfect fruit, weight of 1000 fruits, and the weight of 1000 dried seeds as the selection criteria.

<p><strong>[<em>Application of Various Concentrations of Gibberellin</em> (<em>GA3</em>) <em>on Kailan </em></strong><br /><strong>(<em>Brassica oleracea</em> L.) <em>Growth with Hydroponic Cultivation System</em>]</strong></p><p>Giberelin adalah zat pengatur tumbuh yang banyak digunakan untuk merangsang pertumbuhan dan perkembangan pada tanaman, termasuk pada tanaman kailan yang banyak dikonsumsi. Penelitian ini bertujuan mengetahui pengaruh zat pengatur tumbuh giberelin dan konsentrasinya yang optimal terhadap pertumbuhan tanaman kailan. Penelitian ini dilaksanakan pada bulan Maret - Mei 2019 di Kebun Percobaan Fakultas Pertanian, Perikanan dan Biologi, Universitas Bangka Belitung. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap (RAL) dengan perlakuan giberelin konsentrasi (0 ppm, 20 ppm, 40 ppm, 60 ppm, 80 ppm, dan 100 ppm) diulang empat kali. Pemberian giberelin dilakukan dengan cara perendaman benih sebelum tanam dan dilakukan penyemprotan pada tanaman kailan yang dilakukan dua kali dalam seminggu, dimulai 7 hari setelah tanam. Hasil penelitian menunjukkan bahwa penambahan giberelin dengan konsentrasi 100 ppm memberikan hasil yang tinggi pada tinggi tanaman, diameter batang, luas daun, bobot segar tajuk, dan bobot kering tajuk, dengan persentase kenaikan produksi sebesar 50% dibandingkan kontrol.</p><p><strong>Keywords</strong></p><p>Kailan; Giberelin; Hidroponik</p><p><strong>Abstract</strong></p><p>Gibberellin are plant growth regulators that are widely used to stimulate plants growth and development, including widely consumed Brassica oleracea L. plants. The aims of study to determine the effect of gibberellin and its concentration on growth. The research was conducted in March until May 2019 at experimental garden of the Faculty of Agriculture, Fisheries and Biology, Bangka Belitung University. The experimental design used was a Completely Randomized Design (CRD) with the treatment were concentrations of gibberellin (0 ppm, 20 ppm, 40 ppm, 60 ppm, 80 ppm, and 100 ppm) with four replication. Gibberelin applied by soaking the seeds before planting and spraying the plants twice a week starting 7 days after planting. The results showed that the application of 100 ppm gibberellins gives the best results on plant height, stem diameter, leaf area, canopy fresh weight, and canopy dry weight, with a percentage increase in production by 50% compared to control.</p>

Perendaman lada putih dengan penambahan daun karamunting (Melastoma malabathricum) merupakan salah satu upaya penanganan pascapanen lada. Tujuan penelitian yaitu mempercepat proses perendaman dengan penambahan daun karamunting yang diharapkan dapat meningkatkan kualitas lada putih. Penelitian ini dilakukan di Desa Balunijuk, Kabupaten Bangka Induk, pengujian kualitas di Balai UPTD Sertifikasi dan Pengendalian Mutu, Dinas Perindustrian dan Perdagangan Kepulauan Bangka Belitung dan Lingkungan Hidup. Penelitian ini menggunakan Rancangan Acak Lengkap Faktorial (RALF) dengan 2 faktor perlakuan. Faktor pertama (P) 4 taraf lama perendaman: (P0) kontrol 14 hari, (P1) 9 hari, (P2) 7 hari, (P3) 5 hari. Faktor kedua (K) penambahan dosis daun karamunting: (K0) kontrol tanpa pemberian dosis, (K1) 100 g, (K2) 150 g dan (K) 200 g. Setiap unit percobaan terdiri 2 kg buah lada. Uji lanjut menggunakan DMRT dengan taraf kepercayaan 95%. Hasil penelitian menunjukkan lama perendaman berpengaruh terhadap peubah kadar benda asing, kadar biji kehitam-hitaman, dan kadar minyak atsiri. Perendaman selama 5 hari menghasilkan nilai minyak atsiri lebih tingggi yaitu 2,44%. Tidak ada interaksi antara lama perendaman dengan penambahan daun karamunting terhadap kualitas lada putih.

Keberadaan Collembola dan serangga tanah pada umur perkebunan kelapa sawit yang berbeda dapat menandakan kualitas dan kesuburan tanah yang berbeda-beda. Tujuan penelitian ini adalah untuk mengetahui  keanekaragaman Collembola dan serangga permukaan tanah sebagai indikator kesuburan tanah pada perkebunan kelapa sawit. Penelitian ini telah dilaksanakan pada bulan Juni – Juli 2018 di perkebunan kelapa sawit milik petani Desa Balunijuk, Kabupaten Bangka pada umur tanaman kelapa sawit 3 tahun, 5 tahun, dan 13 tahun dan dilanjutkan identifikasi keanekaragaman Collembola dan serangga tanah di Laboratorium Mikrobiologi Fakultas Pertanian, Perikanan, dan Biologi Universitas Bangka Belitung. Metode yang digunakan adalah metode deskriptif korelasional dengan teknik survei dan teknik purposive sampeling menggunakan perangkap jebak pitfall trap. Hasil penelitian menunjukkan bahwa Keanekaragaman Collembola dan serangga tanah perkebunan kelapa sawit termasuk dalam katagori sedang. Keanekaragaman paling tinggi terdapat pada umur tanaman 3 tahun dengan nilai 2.098. Korelasi keanekaragaman Collembola dan serangga tanah dengan C-organik tanah memiliki korelasi yang positif. Kata kunci: kesuburan tanah, C-organik, identifikasi, pitfall trap.

Honey is a natural liquid which generally has a sweet taste produced by honey bees (Apis sp.) from floral nectar or other parts of plants (extrafloral). Kelulut honey is the honey produced by kelulut bees (Trigon sp). The kelulut bee is a member of the Meliponidae family (Stingless bee) and has a smaller body size compared to Apis bees, making it safe for cultivation. The honey quality cannot be uniformed every time it is harvested. This is because the physical and chemical quality characteristics of honey are very dependent on external and internal factors. External factors that influence it are the source of nectar, season, soil or geographic conditions, processing, and storage conditions. The internal factor that influences it is the type of bee. This study aimed to analyze the chemical characteristics of Bangka kelulut honey based on the Indonesian National Standard (SNI) 3545: 2013. The honey sample used was fresh kelulut honey without processing from the Karomah Forest Farmer Group in Lubuk Lingkuk Village, Lubuk Besar District, Central Bangka Regency. The results showed that the chemical quality characteristics of Bangka kelulut honey have not passed the standards set by the Indonesian National Standard (SNI) 3545: 2013, especially on water content, reducing sugar content and acidity, respectively 28.7%, 59.3%, and 74.6 ml NaOH/kg. Kelulut honey also has vitamin C of 24.1 mg/kg.