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Pengaruh Pemberian Isi Rumen yang Difermentasi dengan Kapang Trichoderma harzianum terhadap Performans Ayam Broiler
No full textUji Lama Fermentasi dan Persentase Inokulum Melalui Kapang Trichoderma harzianum terhadap Peningkatan Kualitas Isi Rumen Sebagai Pakan Ayam
No full textKualitas Eksmecat dari Beberapa Spesies Cacing Tanah pada Tingkat Penyiraman dan Pengapuran yang Berbeda
No full textABSTRAK
Penelitian ini dilaksanakan di Laboratorium Zoologi, Jurusan Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam Institut Pertanian Bogor selama sepuluh bulan mulai Januari 2000 hingga Mei 2001. Tujuan penelitian ini adalah untuk mengevaluasi pengaruh taraf penyiraman air dan pengapuran terhadap kualitas eksmecat dari tiga spesies cacing tanah; Pheretima sp, E. foetida, dan L. rubellus. Data dari kualitas kasting tiga spesies cacing tanah; Pheretima sp, E. foetida, dan L. rubellus terhadap dua level pengapuran (0.2% dan 0.4%) dan dua tingkat penyiraman (10% dan 30%) berat media disajikan dalam bentuk analisis deskriptif. Hasil penelitian menunjukkan bahwa kualitas kasting cacing tanah yang dipelihara selama 90 hari rata – rata adalah N 2.00%- 2.80%, P 0.54%-0.72%, K 1.13-1.65%,C 36.78%-41.36%,Ca 2.46%-3.71%,Mg 0.65%-0.78%,S 0.43%-0.56% dan rasio C/N 13.36-20.16
Kata kunci: cacing tanah, kapur, penyiraman, eksmeca
Uji Lama Fermentasi dan Persentase Inokulum Melalui Kapang Trichoderma harzianum terhadap Peningkatan Kualitas Isi Rumen Sebagai Pakan Ayam
Get PDFABSTRAK
Penelitian ini bertujuan untuk mengetahui persentase inokulum kapang Trichoderma harzianum dan lama fermentasi yang optimal terhadap peningkatkan mutu isi rumen. Metode penelitian yang digunakan adalah
Rancangan Acak Lengkap pola Faktorial (3 x 5), dengan dua ulangan. Sebagai faktor perlakuan A adalah taraf persentase inokulum; 3%, 5%, dan 7%, sedangkan faktor perlakuan B adalah lama fermentasi; 2 hari, 4 hari, 6 hari, 8 hari dan 10 hari. Parameter yang diukur adalah; Serat kasat, protein kasar, lemak kasar, kalsium dan fosfor Hasi penelitian menujukkan bahwa persentase inokulum sebanyak 3%, 5% dan 7% yang diberikan berpengaruh sangat nyata (P<0,01) terhadap peningkatan protein kasar. Interaksi antara persetase inokulum yang diberikan
dengan lama fermentasi memberikan pengaruh yang nyata (P<0,05) terhadap peningkatan protein kasar. Fermentasi inokulum 7 % dengan lama inkubasi 10 hari tertinggi kandungan protein kasarnya yakni sebesar
18,48%. Lama fermentasi berpengaruh sangat nyata (P<0,01) terhadap serat kasar. Interaksi antara persentase inokulum dengan lama fermentasi memperlihatkan pengaruh yang berbeda nyata (P<0,05) terhadap penurunan serat kasar. Interaksi antara persentase inokulum 7% dengan lama fermentasi 8 hari mengandung serat kasar
yang terendah.Lemak kasar dipengaruhi oleh persentase inokulum, lama fermentasi serta interaksi antara persentase inokulum dengan lama fermentasi. Kalsium tidak dipengaruhi oleh kadar persentase inokulum, lama fermentasi serta interaksi antara persentase inokulum dengan lama fermentasi (P>0,05). Kadar fosfor dipengaruhi sangat nyata (P<0,05) oleh waktu fermentasi sedangkan persentase inokulum serta interaksi keduanya tidak memberikan pengaruh yang nyata ( P<0,05).
Kata kunci. Trichoderma harzianum, inokulum, dan isi rumen
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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