1,720,967 research outputs found
Pengelolaan sagu (Metroxylon spp.) Di PT. National Sago Prima, Selat Panjang, Riau dengan aspek khusus pengaruh bobot bibit dan penggunaan pupuk organik cair terhadap pertumbuhan bibit sistem polibag di pembibitan
Full text linkThe objective of this study was to obtain some informations about sago palm cultivation especially in nursery and know the effect of sucker weight and liquid manure application to the vegetative growth of sago sucker at polybag nursery system. This experiment held in PT. National Sago Prima, Selat Panjang, Riau from February to June 2011. The primary data were found by direct methods, it included the following activities in cultivation of sago palm, and did experiment in the field. The secondary data were found by indirect method, interviewed and discussed with the company staff and study literature to get more informations. The special aspect was find by arranged in split plot design, where the main plot was sucker weight with three levels (50-200 g, 200-500 g, and 500-800 g) and the subplot was four levels of liquid manure application (0, 2, 5, and 8 ml/l) with three replications. The results showed that there was no significantly different in the vegetative growth of sucker by liquid manure application. The sucker weight treatment showed significantly different to survival rate, leaf length, number of leaves, and percentage of expanded leaves. The larger suckers produced higher of leaf length. However, larger suckers didn’t always produce higher percentage of expanded leaves and higher survival rate of suckers in comparison to smaller ones. The sucker weight 200-500 g was the best sucker size to the vegetative growth of sucker
KARAKTERISASI POTENSI GENETIK PROGENI F1 HASIL PERSILANGAN TETUA BETINA SBW 2020 DENGAN ENAM KLON TETUA JANTAN
Full text linkKeragaman genetik yang luas merupakan kunci utama dalam proses seleksi menghasilkan klon-klon karet unggul baru. Program pemuliaan karet untuk menghasilkan klon unggul baru melalui persilangan membutuhkan beberapa tahapan seleksi, yaitu uji progeni F1, uji plot promosi atau uji pendahuluan, uji lanjutan, dan adaptasi lokasi. Tujuan penelitian adalah karakterisasi pertumbuhan dan potensi produksi lateks sebanyak 131 progeni F1 hasil persilangan klon SBW 2020 dengan enam klon tetua jantan berbeda yaitu BPM 1, BPM 107, BPM 109, IRR 24, PB 260, dan SP 217. Karakter pertumbuhan yang diamati adalah lilit batang, tebal kulit batang, dan jumlah ring pembuluh lateks yang di sadap saat umur tiga tahun. Potensi produksi lateks masing-masing progeni dievaluasi dengan metode testateks, sistem sadap S/2 d3, dan aplikasi ethrel 2,5% setiap bulan. Hasil seleksi dengan intensitas 1%, 5%, dan 10% terpilih sebanyak 14 progeni F1. Lima progeni terbaik hasil intensitas seleksi 1% dengan potensi produksi lateks berkisar 23,25 – 49,21 g/p/s dihasilkan dari persilangan SBW 2020 dengan BPM 107 (HP2009G1, HP2009G15, dan HP2009G11) dan SBW 2020 dengan IRR 24 (HP2009G14 dan HP2009G10). Kelima progeni tersebut memiliki pertumbuhan yang jagur dengan lilit batang berkisar 47,8 – 57,7 cm, tebal kulit 4,7-5,8 mm, jumlah pembuluh lateks 4-6 per cm kulit batang, serta respon yang sangat bagus terhadap penambahan stimulan. Selanjutnya progeni terbaik 1% akan di evaluasi pada uji plot promosi dan terbaik 5% dan 10% akan masuk ke uji pendahuluan
KERAGAMAN SIFAT PERTUMBUHAN FISIOLOGI DAN DAYA HASIL PROGENI KARET (HEVEA BRASILIENSIS MUELL ARG) HASIL PERSILANGAN ANTARA KLON PB 260 DAN RRIC 100
Full text linkTingginya keragaman ditingkat progeni membuat para pemulia karet dituntut lebih teliti dalam melakukan seleksi awal calon genotipe baru. Beberapa parameter seperti karakter pertumbuhan tanaman, anatomi dan fisiologi lateks mempengaruhi produksi karet. Penelitian ini bertujuan untuk mengetahui keragamaan ditingkat progeni dan mengetahui karakter yang berpengaruh langsung terhadap daya hasil karet pada populasi hasil persilangan antara PB 260 dan RRIC 100. Hasil penelitian menunjukkan bahwa progeni hasil persilangan antara PB 260 dan RRIC 100 mempunyai tingkat keragaman tinggi pada daya hasil, kadar sukrosa, kadar fosfat anorganik, dan jumlah pembuluh lateks, sedangkan lilit batang, tebal kulit, dan kadar tiol mempunyai keragaman yang rendah. Lilit batang dan tebal kulit batang berkorelasi nyata terhadap daya hasil. Namun berdasarkan analisis regresi bertatar, hanya lilit batang yang mempunyai pengaruh langsung terbesar terhadap daya hasil pada progeni hasil persilangan PB 260 x RRIC 100, sedangkan parameter lilit batang dan kadar tiol mempunyai pengaruh langsung terbesar terhadap daya hasil pada progeni hasil persilangan RRIC 100 x PB 260. Diterima : 19 Mei 2015; Direvisi : 8 September 2015; Disetujui : 19 September 2015 How to Cite : Syafaah, A., Ismawanto, S., & Herlinawati, E. (2015). Keragaman sifat pertumbuhan fisiologi dan daya hasil progeni karet (hevea brasiliensis muell arg) hasil persilangan antara klon PB 260 dan RRIC 100. Jurnal Penelitian Karet, 33(2), 121-130. Retrieved from http://ejournal.puslitkaret.co.id/index.php/jpk/article/view/17
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
PERTUMBUHAN TBM, KARAKTER FISIOLOGI, DAN KETAHANAN PENYAKIT KLON-KLON KARET IRR SERI 300 DI SUMATERA SELATAN
Full text linkKlon-klon karet IRR Seri 300 merupakan hasil persilangan yang dilakukan oleh Balai Penelitian Sungei Putih, Pusat Penelitian Karet pada tahun 1991 dan 1992. Pada tahun 2013 mulai dilakukan pengujian lanjutan di Kebun Percobaan Sembawa, Sumatera Selatan pada 22 klon-klon IRR seri 300 terpilih yang ditanam seluas 1 Ha masing-masing klon. Parameter pengamatan meliputi pertumbuhan tanaman, resistensi klon terhadap penyakit daun yang menyerang selama masa tanaman belum menghasilkan (TBM), karakter fisiologi awal, dan produksi tahun pertama. Hasil pengamatan pertumbuhan tanaman TBM pada 22 klon IRR Seri 300, terdapat enam klon yang mempunyai matang sadap pada umur 4,5 tahun yaitu IRR 300, IRR 301, IRR 302, IRR 307, IRR 309, dan IRR 310. Pengukuran lilit batang lanjutan sebelum penyadapan serentak dilakukan, terdapat 20 klon IRR seri 300 memiliki pertumbuhan TBM yang lebih baik daripada klon pembanding BPM 24 kecuali klon IRR 311 dan IRR 314. Selain itu, sebanyak delapan klon IRR seri 300 yang mempunyai lilit batang dan tebal kulit yang lebih baik daripada klon-klon lainnya (lilit batang > 45 cm dan tebal kulit > 5 cm), yaitu IRR 301, IRR 303, IRR 306, IRR 309, IRR 310, IRR 315, IRR 316, dan IRR 323. Kedelapan klon tersebut juga mempunyai tingkat resistensi tergolong resisten-sangat resisten terhadap penyakit gugur daun Corynespora dan Colletotrichum. IRR 306 dan IRR 310 merupakan salah satu klon harapan baru yang dapat dikembangkan di wilayah Sumatera Selatan. Pengamatan lanjutan masih perlu dilakukan untuk mendapatkan data pertumbuhan dan produksi klon-klon IRR Seri 300 pada masa tanaman menghasilkan (TM)
Variations on the Author
Full text link“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
Full text linkWe 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
Full text linkWe 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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