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Bioma : Berkala Ilmiah Biologi

bioma
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Published by Universitas Diponegoro

ISSN : - EISSN : 25982370 DOI : -

Core Subject : Education, Agriculture,

Agriculture, Biological Sciences & Forestry Education

BIOMA (ISSN 1410-8801) adalah Majalah Ilmiah Biologi yang bertujuan mewadahi semua informasi hasil penelitian, telaah pustaka, makalah teknis, dan kajian buku, dari berbagai cabang ilmu Biologi. Diharapkan penerbitan ini dapat berkontribusi dalam penyampaian informasi ilmiah yang merupakan mata rantai proses kegiatan ilmiah. Terbit sejak tahun 1999.

Arjuna Subject : -

Articles 7 Documents

Search results for , issue "Vol. 13, No. 2, Tahun 2011" : 7 Documents clear

Perubahan Kandungan Ammonia, Nitrit dan Nitrat Dalam Air Tambak Pada Model Budidaya Udang Windu Dengan Rumput Laut Sargassum plagyophyllum dan Ekstraknya Izzati, Munifatul -
Bioma : Berkala Ilmiah Biologi Vol. 13, No. 2, Tahun 2011
Publisher : Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro

Salah satu masalah penyebab kegagalan dalam budidaya udang windu adalah tingginya limbah organic akibatsisa pakan yang tidak dikonsumsi. Akumulasi sisa pakan yang sebagian besar komponenya protein ini telahmengakibatkan meningkatnya konsentrasi ammonia, nitrit dan nitrat dalam air tambak. Ammonia dan nitritmerupakan bahan kimia yang dapat meracuni udang yang dibudidayakan. Model budidaya ganda udang denganrumput laut merupakan salah satu teknik untuk menurunkan kandungan ammonia, nitrit dan nitrat dalam air tambak.Penelitian ini bertujuan untuk menguji penurunan kandungan ammonia, nitrit dan nitrat dalam air tambak padamodel budidaya udang dengan rumput laut Sargassum plagyophyllum dan ekstraknya. Penambahan ekstrakSargassum ini diharapkan dapat menurunkan pertumbuhan bakteri pathogen, sebagaimana sifat antibakteri padaekstrak tersebut. Model budidaya udang tanpa rumput laut maupun ekstrak digunakan sebagai kontrol. Rancanganpenelitian ini adalah acak lengkap (RAL), dengan 3 perlakuan dan 3 ulangan. Data yang diperoleh diolah denganANOVA faktor tunggal. Hasil penelitian menunjukkan bahwa model budidaya udang dengan Sargassum dapatmenurunkan ammonia dan nitrit hanya sampai dengan usia pemeliharaan 8 minggu. Lebih dari usia pemeliharaantersebut, kandungan ammonia dan nitrit justru meningkat. Hal ini disebabkan karena Sargassum yang digunakanmengalami kematian akibat turunnya hujan pada minggu ke-10. Penambahan ekstrak Sargassum tidak menimbulkanperbedaan kandungan ammonia, nitrit dan nitrat apabila dibandingakan dengan kontrol.

Specific Leaf Area, Jumlah Trikomata dan Kandungan Kalium Daun Semai Kakao (Theobroma cacao L.) Pada Kandungan Air Tanah Berbeda Prihastanti, Erma -
Bioma : Berkala Ilmiah Biologi Vol. 13, No. 2, Tahun 2011
Publisher : Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro

The existence of global warming caused the climate change such as the occurrence of long dry seasonsassociated with ENSO (El Nino Southern Oscillation). The climatologists predict these events will occur more oftenin the future. Cocoa plants require a relatively uniform distribution of rainfall in the year without a long dry season.The existence of drought stress can affect the rate of decline in the growth and development such as leaf expansionrate and decreased availability of nutrients in the root zone. This study aims to determine changes in specific leafarea (SLA), the number trichomes and K + content of leaves of cocoa seedlings at different soil water content. Thisstudy uses 36 cacao plants with 12-month-old were grown for two months on medium soil with soil water content of75%, 50% and 25%. Parameters observed are the SLA, the number trikomata and K+ content of leaves. The resultsshowed the age of 12 months of cocoa seedlings planted on different soil water content showed differences in SLA,trichomes and K+ content of leaves. The seedling grown optimum when planted on soil water content of 75%,whereas in 50% soil water content began to decline in growth with decreasing SLA and without leaves trichomes.The development and growth of seedlings declined sharply if planted in soil water content of 25%.

Pertumbuhan Mencit (Mus musculus L) Setelah Pemberian Biji Jarak Pagar (Jatropha curcas) Muliani, Hirawati -
Bioma : Berkala Ilmiah Biologi Vol. 13, No. 2, Tahun 2011
Publisher : Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro

The research of white mouse growth exposed to barbados nutâ€™s seed is aimed to know about the effect ofbarbados nutâ€™s seed on the growth of female white mouse.Thirty two female white mouse were acclimated during 1 week and then alloted into 2 groups, each groupwas treated as follows : P0 (control): were giving of aquadest; P1: were giving of 0,2 grams barbados nutâ€™s seedpowder daily per mouse. Barbados nutâ€™s seed powder were given by pipet to the mouth of the mouse. Long of thetreatment was 14 days and each treatments with 16 replication.Main parameter observed was the change of the body weight. Supporting parameter was the foodconsumption. Data was analyzed by varians analysis with Completely Random Design.The white mouse was exposed of the barbados nutâ€™s seed decrease of the body weight.

Pertumbuhan Legume pada Ketinggian yang Berbeda Growth of Legums in Different Altitude Sarmita, Fitriani -; Hastuti, Endah Dwi; Haryanti, Sri -
Bioma : Berkala Ilmiah Biologi Vol. 13, No. 2, Tahun 2011
Publisher : Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro

Alfalfa (Medicago sativa L.) was one of the example plant that the chlorophyll has been used for medicine,but there were obstacles in cultivation alfalfa (M. sativa L.), becouse the seed must have been imported. Besides that,in Indonesia Alfalfaâ€™s seed was sterile. Legume used in this research will use as chlorophyll alternative source besidealfalfa (M. sativa L.). Legume that have been examined were planted in three location with different altitude that wasSemarang (200 m above sea level), Ungaran (316 m above sea level) and Bandungan (843 m above sea level).Alfalfa (M. sativa L.) is subtropical plant meanwhile legume used to be cultivated in Indonesia is tropical plant.Thatâ€™s why in this research examined legume were planted in different altitude. Purposes of this research were toknow the growth of legume, knowing if there were interaction among five legumes and planting location withdifferent altitude.. Legumes that were used winged bean (Psophocarpus tetragonolobus (L.) DC.), cowpea (Vignaunguiculata (L.), alfalfa (M. sativa L.), long bean (Vigna sesquipedalis) and common bean (Phaseolus vulgaris L.).The experimental design is completely randomize design with four replication. The data were analyzed by ANOVAtest and continued with Duncan multiple range test with 95% confidence intervals.The results showed that (P.tetragonolobus (L.) DC.) which was planted in Ungaran has the optimum growth of legume.

Fluktuasi Populasi Walang Sangit Leptocorisa oratorius F. (Hemiptera : Alydidae) Pada Komunitas Padi Di Dusun Kepitu, Sleman, Daerah Istimewa Yogyakarta Pratimi, Anita -
Bioma : Berkala Ilmiah Biologi Vol. 13, No. 2, Tahun 2011
Publisher : Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro

Research on population fluctuation of rice bug L. oratorius on paddy community using Situ Bagendit,Ciherang and IR64 rice varieties in Kepitu Village, Sleman was done. This experiment was conducted in April 2011to July 2011 in the paddy community Kepitu Village, Sleman, Daerah Istimewa Yogyakarta. The objectives of theresearch was to predict the population fluctuation of rice bug pest in rice crops in paddy community Kepitu Village,Sleman, Daerah Istimewa Yogyakarta with a special approach using correlogram analysis.The purposive sampling technique was used in this research. Rice terraces of the sampling unit were plotted inrice varieties of Situ Bagendit, Ciherang and IR64 respectively. Rice bug was counted in series of periodical time(every three days). Total number of rice bug per m2 was used for determining the serial correlation coefficient (rs)and the variance of log population density at time t and t +1 (log Nt and log Nt+1) for every three days (t).The valueof rs was associated with s in correlogram. Fluctuation population of the rice bug determined through concistencyperiodicity and amplitude curve of the correlogram. The population distribution pattern was identified by means theratio between variance and the average of total number of rice bug.The result showed that the population fluctuation of rice bug was predicted by the migration, from thereservoir to rice crop and vice versa. The plots which were adjacent to refuge protected from insecticide sprays havehigher abundance of rice bug than the plots which were located far from the refuge. Based on the correlationcoefficient, the population fluctuation of Situ Bagendit riceâ€™s plots has an oscillation trend. The corellogram curveshowed exogenous and irregular type. In the plots planted with Ciherang rice, the pop fluctuation was alsoexperience oscillations with corellogram curve shapes, it indicates endogenous and exogenous type with an irregularperiodicity. In the plots planted with IR64 rice, oscillation occur with the endogenous corellogram curve with nonstationaryand non-periodict type. The pattern of population distribution of rice bug in Kepitu Village was aclustered distribution.

EKOLOGI BENTANG LAHAN Soeprobowati, Tri Retnaningsih
Bioma : Berkala Ilmiah Biologi Vol. 13, No. 2, Tahun 2011
Publisher : Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro

Ekologi Bentang lahanmerupakan dasar dari lingkungan manusia.Manusia sendiri dalam hidupnya tidak dapatterlepas dari hewan dan tumbuhan. Oleh karena itubentang lahan dapat didefinisikan sebagaikarakteristik alami suatu area dari dan atau dekatpermukaan bumi yang terbentuk oleh adanyainteraksi antara faktor abiotik (batuan, air, udara,tanah) dan faktor biotik (tumbuhan, hewan danmanusia) yang saling mempengaruhi dandipengaruhi. Oleh karena itu maka kajian bentanglahan fokus pada kajian hubungan antara ruangdan waktu antara fenomena alam dan proses didalam bentang lahan atau geosfer termasukkomunitas tumbuhan, hewan dan manusia

Pertumbuhan dan Produktivitas Tanaman Bawang Merah (Allium ascalonicum L. var.Tiron) Dengan Perlakuan Gracilaria verrucosa Sebagai Penjerap Air Pada Tanah Pasir Umami, Arif -; Darmanti, Sri -; Haryanti, Sri -
Bioma : Berkala Ilmiah Biologi Vol. 13, No. 2, Tahun 2011
Publisher : Departemen Biologi, Fakultas Sains dan Matematika, Universitas Diponegoro

The aims of this study to determine effect of treatment G.verrucosa as water trappers on growth andproductivity of onions crops grown on sandy soil. The research using CRD with factorial pattern ( 3 x 4 ). The firstfactor is the size of pieces G.verrucosa (U1 =flour, U2 =0.25 cm, U3 = 0.5 cm). The second factor is thecomposition of the mixture G.verrucosa: sand (T1 = 0%: 100%, T2 =10%: 90%, T3 =20%: 80% and T4 =30%:70%). The data obtained were analyzed by ANAVA at the level of significance of 95% followed by Duncan's at95% significance level. The results showed that the addition of G. verrucosa able to increase growth and cropproductivity compared with the onion crops grown on sandy soil only. The most influential medium for plantgrowth is a mixture of onion G. verrucosa with sand on the composition of 20%: 80% with G. verrucosa in all sizes,while the most influential medium for the production of onion crop is a mixture of G. verrucosa in all sizes with asandy soil with a ratio of 10%: 90%.

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