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All Journal MEDIA PETERNAKAN - Journal of Animal Science and Technology METAMORFOSA Journal of Biological Sciences
. Chairul
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology

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Morfometrik Usus dan Performa Ayam Broiler yang Diberi Cekaman Panas dan Ekstrak n-Heksana Kulit Batang “Jaloh" (Salix tetrasperma Roxb) . Sugito; W Manalu; D A Astuti; . Chairul
Media Peternakan Vol. 30 No. 3 (2007): Media Peternakan
Publisher : Faculty of Animal Science, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (116.752 KB)

Abstract

The n-hexane fraction of “jaloh" extract could reduce detrimental effects of heat stress on broiler chicken. An experiment was conducted to study morphometric of small intestine villi (duodenum, jejunum, and ileum) and performances of broiler exposed to heat stress on 33±1oC for 4 hours/day and given extract n-hexane of “jaloh" bark (EHJ) with doses 5, 10, and 20 mg/kg body weight (BW). Thirty broilers aged 20 days (Cobb strain) were randomly divided into 5 groups of treatments. The first treatment group was external control namely chickens without heat stress and without EHJ administration (tCP). The second group of treatment was internal control representing chickens exposed to heat stress without EHJ administration (CP). The third, fourth, and fifth treatment groups consisted of chickens exposed to heat stress and given 5 (CP+EHJ5), 10 (CP+EHJ10), and 20 mg/kg BW of EHJ (CP+EHJ20), respectively. Heat stress and “jaloh" extract were implemented every day. “Jaloh" extracts were given 1 hour before temperature in the cage was raised. Results showed that heat stress decreased weight gain and height of jejunum villi, and increased feed conversion ratio. The dose of 10 mg/kg BW of EHJ can improve performance of broiler chickens and morphometric of small intestine villi. Key words: heat stress, Salix tetrasperma, performance, broiler
KEANEKARAGAMAN JENIS TUMBUHAN DAN PENDUGAAN CADANGAN KARBON DI ATAS PERMUKAAN TANAH DI KAWASAN HUTAN BUKIT BARISAN BAGIAN BARAT KOTA PADANG . Yastori; . Chairul; . Syamsuardi; . Mansyurdin; Tesri Maideliza
Metamorfosa: Journal of Biological Sciences Vol 3 No 2 (2016)
Publisher : Prodi Magister Ilmu Biologi, Fakultas MIPA, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/metamorfosa.2016.v03.i02.p02

Abstract

Indonesia has a vast forest area. The extent of Indonesia's forests is one of the natural resources are prone to damage due to human interests in meeting their needs. One of the damage that often occurs when current is forest fires. Forest destruction accounts for 20-25% of global CO2 emissions that contribute to climate change or global warming. Unspoiled forest with a diversity of plant species are long-lived and litter is a place to store a lot of carbon stocks (C) the highest. The aim of this study was to determine the diversity of plants and the amount of carbon stock above ground level in the forests of the Bukit Barisan of Padang, West Sumatra. Tree biomass was calculated on a plot of 20x20 m, 10x10 m pole, stake 5x5 m, for counting down plant biomass and litter on the plot with a size of 2x2 m (National Standardization Agency, 2011). Biomass calculated by the Ketterings et al. formula (2001). In Bukit Barisan Forest Area, West Sumatra, derived carbon content was 16.029,70 ton/ha. Diversity type was highest at tree level on Station 1, classified as very high diversty with diversity index (H’) 3.10.
STUDI LINGKAR TUMBUH POHON DI KAWASAN HUTAN TAMAN NASIONAL SIBERUT KEPULAUAN MENTAWAI . Mansyurdin; Tesri Maideliza; . Chairul; Ema Susiana
Metamorfosa: Journal of Biological Sciences Vol 3 No 1 (2016)
Publisher : Prodi Magister Ilmu Biologi, Fakultas MIPA, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/metamorfosa.2016.v03.i01.p02

Abstract

Growth ring trees are formed by activity of the cambium which is influenced by the changing seasons.   In the tropical are not all of  trees species produce  the growth ring, because the season of  tropics is more uniform throughout the year and does not show sharp distinction between the periods of high rainfall and period of low rainfall. This study has concentred on several tree forest areas in Siberut National Park, Mentawai Islands. Samples were ollected by using borer on the main stem on the height of 130 cm. To see or not to see growing circle with to be checked macroscopically and microscopically. The macroscopic examination was done polished core by several grades of sandpaper in the transverse surface Tree species which have growth ring continued to microscopic observation with making slice anatomy. Based on 46 species of trees were examined, and  6 species were with found a growth ring in the number of cell mixture early wood and late wood from these species.
PRODUKTIVITAS PRIMER FITOPLANKTON DAN ANALISIS FISIKA KIMIA DI PERAIRAN LAUT PESISIR BARAT SUMATERA BARAT Gusna Merina; Indra Junaidi Zakaria; . Chairul
Metamorfosa: Journal of Biological Sciences Vol 3 No 2 (2016)
Publisher : Prodi Magister Ilmu Biologi, Fakultas MIPA, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/metamorfosa.2016.v03.i02.p08

Abstract

Studies on Phytoplankton Primary Productivity and Analysis of Chemical Physics at Sea waters of the West Coast of West Sumatra has been conducted from April-October 2015 on the west coast of West Sumatra. The purpose of this study to determine the number of primary productivity generated by western sea coast of West Sumatra as well as analyze the physico-chemical conditions of the waters. The method used is the method of chlorophyll-a and Winkler methods for the measurement of oxygen and carbon dioxide as well as direct measurement by using the tool in other chemical physics parameters were observed. Primary productivity found in the coastal waters of western Sumatra on average ranged from 0.019 to 0.035 mg/ m3. The range of the primary productivity showed western coastal waters of West Sumatra is still relatively oligotrophic (low fertility). Physico-chemical parameters in waters off the West Coast of West Sumatra is still quite good in which all parameters were observed still under sea water quality standard.
STRUKTUR KERAPATAN VEGETASI DAN ESTIMASI KANDUNGAN KARBON PADA BEBERAPA KONDISI HUTAN DI PULAU SIBERUT SUMATERA BARAT . Chairul; Erizal Muchktar; . Mansyurdin; Tesri Maideliza; Gusmardi Indra
Metamorfosa: Journal of Biological Sciences Vol 3 No 1 (2016)
Publisher : Prodi Magister Ilmu Biologi, Fakultas MIPA, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/metamorfosa.2016.v03.i01.p03

Abstract

Hutan Tropik memiliki sumber cadangan karbon sangat besar yang dapat berubah akibat perubahan kondisi hutan yang disebabkan oleh aktivitas  manusia, termasuk penebangan dan perkebunan sehingga mengancam perubahan iklim dunia. Kajian analisis dilakukan untuk menetahu struktur vegetasi dan kandungan karbon pada tiga kondisi hutan di Pulau Siberut sebagai upaya mitigasi perubahan iklim. Untuk mendapatkan data biomassa bagian atas tanah dan serasah digunakan metode plot berpetak.  Hasil Penelitian didapatkan 38 spesies dan 122 individu tumbuhan pada hutan primer, 22 spesies dan 49 individu pada hutan bekas tebangan serta 45 spesies dan 120 individu pada hutan tanaman campuran. Kandungan karbon bagian atas tumbuhan hidup pada hutan primer 1.359.884,68 kg/ha, hutan bekas tebangan 610.429,67 kg/ha  dan hutan tanaman campuran 360.793,70 kg/ha.  Kandungan karbon pada serasah hutan primer 774,49 kg/ha, hutan bekas tebangan 521,36 kg/ha dan hutan tanaman campuran 766,20 kg/ha.
Co-Authors . Mansyurdin . Yastori D A Astuti Ema Susiana Erizal Muchktar Gusmardi Indra Gusna Merina Indra Junaidi Zakaria Sugito Sugito Syamsuardi Syamsuardi Tesri Maideliza W Manalu