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PENGARUH PEMBERIAN PUPUK ORGANIK CAIR LIDAH BUAYA (Aloe vera) TERHADAP PERTUMBUHAN BIBIT KOPI ROBUSTA (Coffea canephora,Pierre) Yulia, Arnis En; Syafrinal, Syafrinal; Muhardi, Muhardi
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Pertanian

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Abstract

The objective of this research is to determine the effect of giving Aloe Vera Biofertilizer Liquid and to get the best concentration to increase the growth of Robusta coffee seeds. This research was conducted at experimental station of the Faculty of Agriculture, Riau University. This research was conducted experimentally using a Completely Randomized Design consisting of five treatments and four replications. The treatment in this study was the treatment without Aloe Vera Biofertilizer Liquid, Aloe Vera Biofertilizer Liquid concentration 5 ml.l-1 air, 10 ml.l-1 air, 15 ml.l-1 air and 20 ml.l-1 air. The data obtained were analyzed by variance and tested further with Duncan new range test at the level of 5 %. The observed parameters were increase in plant height (cm), increase in stem base circumference (cm), increase in number of leaves (strands) and leaf area (cm2). The results showed that the application of Aloe Vera Biofertilizer Liquid with a concentration of 20 ml.l-1 air is the best concentration in increasing the growth of Robusta coffee seeds. Keywords :Coffee Seed, Aloe Vera Biofertilizer
UJI AKTIVITAS ANTIOKSIDAN EKSTRAK KULIT BATANG DALU – DALU (Salix tetrasperma Roxb) MENGGUNAKAN METODE DPPH (1,1-DIFENIL-2-PIKRILHIDRAZIL) Syafrinal, Syafrinal; Ramadhani, Sari
JURNAL TEKNOLOGI PERTANIAN Vol 8 No 1 (2019)
Publisher : Prodi Teknologi Pangan Fakultas Pertanian Universitas Islam Indragiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (307.13 KB) | DOI: 10.32520/jtp.v8i1.486

Abstract

Penelitian ini bertujuan untuk mengetahui aktivitas antioksidan dari  ekstrak kulit batang Dalu – Dalu (Salix tetrasperma Roxb) dengan menggunakan metode DPPH (1,1-difenil-2-pikrilhidrazil). Ekstraksi dilakukan dengan metode maserasi menggunakan n-heksana ,etil asetat  dan metanol. Aktivitas antioksidan diukur menggunakan spektrofotometer UV-Vis dan dinyatakan sebagai nilai IC50. Hasil pengukuran secara spektrofotometri menunjukkan bahwa fraksi n-heksana memiliki aktivitas antioksidan yang sangat lemah  dengan  nilai  IC50   sebesar  713,58 ppm, fraksi etil asetat dan metanol memiliki aktivitas antioksidan yang sangat kuat  dengan  nilai  IC50   sebesar  9,14 ppm dan 12,68 ppm  serta asam askorbat sebagai  kontrol  positif memiliki aktivitas antioksidan sangat kuat dengan IC50 sebesar 10,65 ppm.