Judul: Understory Plant Diversity and Carbon Stock Potential in Post-Mining Revegetation Land at PT. Berau Coal East Kalimantan
Abstrak: Inventarisasi tumbuhan dan perhitungan karbon dilakukan untuk mengukur keberhasilan revegetasi lahan pascatambang. Penelitian ini bertujuan untuk mengetahui keanekaragaman tumbuhan bawah serta mengetahui potensi simpanan kabon di atas permukaan tanah serta kaitannya terhadap perbedaan umur lahan revegetasi 2018, 2016 dan 2013. Pembuatan plot menggunakan metode petak contoh berukuran 50 m x 50 m sebanyak 3 plot pertegakan umur. Masing-masing plot terdapat 4 (subplot). Pengukuran biomassa dilakukan dengan metode non destruktif dan menggunakan rumus alometrik. Hasil penelitian menunjukkan keanekaragaman ketiga umur revegetasi yang tidak jauh berbeda. Biomassa total dan kandungan karbon tersimpan tertinggi dihasilkan pada revegetasi tahun 2013 dengan total sebesar 81,61 ton/ha dan total kandungan karbon tersimpan sebesar 38,36 ton C/ha sedangkan biomasa total dan simpanan karbon di lahan revegetasi tahun 2018 adalah 33,23 ton/ha dan 15,62 ton C/ha dan biomasa total dan simpanan karbon di lahan revegetasi tahun 2016 adalah 75,48 ton/ha dan 35,48 ton C/ha. Kata kunci: biomassa, karbon, reklamasi, tambang, tumbuhan bawah, Plant inventories and carbon calculations are carried out to measure the success of post-mining land revegetation. Plant inventories and carbon calculations are carried out. This research aims to determine the diversity of understory plants and determine the potential for carbon deposits above ground and their relationship to differences in the age of revegetated land in 2018, 2016 and 2013. Plots were made using the sample plot method measuring 50 m x 50 m with a total of 3 plots. Each plot has 4 (subplots). Biomass measurements are carried out using non-destructive methods and using allometric formulas. The research results show that the diversity of the three revegetation ages is not much different. The highest total biomass and stored carbon content was produced in revegetation in 2013 with a total of 81,61 tons/ha and the total stored carbon content was 38,36 tons C/ha while the total biomass and carbon savings in revegetated land in 2018 was 33,23 tons/ha and 15,62 tons C/ha and total biomass and carbon storage in revegetated land in 2016 was 75,48 tons/ha and 35,48 tons C/ha. Keywords: biomass, carbon, mining, reclamation, undergrowth
Keyword: carbon, mining, reclamation, undergrowth

Judul: Species Composition, Vegetation Structure, and Carbon Absorption in Revegetation Post-Mining Areal PT Berau Coal
Abstrak: Reklamasi lahan pasca tambang wajib dilakukan oleh perusahaan tambang, salah satu perusahaan tambang yang melakukan kegiatan reklamasi pasca tambang yaitu PT Berau Coal. Kegiatan reklamasi dan revegetasi menggunakan pola tanam agroforestri diharapkan dapat memulihkan kerusakan ekologi. Penelitian bertujuan mengetahui komposisi jenis, struktur vegetasi, dan menghitung potensi serapan karbon di areal revegetasi site BMO-1 PT Berau Coal. Pengambilan data dengan metode non destructive sampling menggunakan persamaan allometric pada tegakan revegetasi Blok 1-2, dan Blok 1-4, sebanyak 5 plot pada tiap petak ukur 20 m × 20 m. Hasil indeks nilai penting (INP) tingkat pohon tertinggi yaitu Paraserianthes falcataria, tingkat tiang yaitu Senna siamea, dan tingkat pancang dan semai yaitu Nephelium lappaceum. Indeks keanekaragaman jenis (H’), kekayaan jenis (R), dan kemerataan jenis (E) terbesar pada tingkat pancang. Stratifikasi tajuk pada pola tanam agroforestri termasuk dalam strata B, C, dan D, sedangkan pola tanam monokultur termasuk dalam strata B dan C. Nilai biomassa dan serapan karbon tertinggi pada pola tanam agroforestri yaitu P. falcataria.
Keyword: agroforestry, carbon absorption, revegetation, species composition, vegetation structure

Judul: Deteksi Imunoglobulin Y Pada Telur Asin Anti Diare Dan Flu Burung Dengan Metode Agar Gel Precipitation Test (AGPT) Dan Hemagglutination Inhibition Test (Hi Test)
Abstrak: This study was conducted to detect specific IgY (anti Enteropathogenic Escherichia coli (EPEC), anti Salmonella Enteritidis, and anti Avian Influenza Virus H5N1) in salted egg. The laying hens were vaccinated with EPEC and Salmonella Enteritidis inactive-vaccine and AI H5N1 vaccine (IPB-Shigeta). Nine eggs were salted by NaCl solution (1:2). The eggs were salted by three times of long-term salting (10 days, 15 days, and 20 days). The IgY was detected using AGPT and haemagglutination inhibition (HI) test. The AGPT result showed that specific IgY of EPEC and Salmonella Enteritidis detected at 10 days and 15 days long-term salting. The mean titer of anti AI-IgY (over 24) was detected using by HI at all long-term salting. In conclusion, salted egg yolk still have specific IgY which is potential for production functional salted egg.
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