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All Journal Jurnal Agroqua: Media Informasi Agronomi dan Budidaya Perairan Journal of Tropical Horticulture
Putri, Olivia Damayanti
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences

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Utilization of Anthocyanin Extracted from Pletekan (Ruellia tuberosa L.) in Determination Soil pH Putri, Olivia Damayanti; Pertiwi, Dharmi Wimi; Widjajani, Bakti Wisnu
Journal of Tropical Horticulture Vol 2, No 2 (2019): October 2019
Publisher : Yayasan Pertanian Tropika Indonesia (YPTI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1571.668 KB) | DOI: 10.33089/jthort.v2i2.19

Abstract

Pletekan (Ruelliatuberosa L.) is a flowering plant that grows wild. Pletekan has blue-purple flowers, containing the anthocyanin as its specific color. Anthocyanin is an organic material that can be used as an indicator of natural acid alkali, because the color of anthocyanin can ensure specific color changes when it reacts with materials at a certain pH as well. This research aimed to utilize anthocyanin extracted from pletekan as a determinant of soil pH. The used method was maceration extraction by soaking fresh pletekan flowers using maceration solvent (methanol acidified by HCl 1%) for 2-3 days. Concentrated anthocyanin extracts needed to be diluted with extracts that had not been concentrated so that the resulted color changes were more specific. The anthocyanin mixture was applied to pH 1-12 buffer solution and in acid and alkaline soil samples. The soil was dissolved using aquadest at a ratio of 1: 2, the soil was left to settle to get water. The color change in the tested water of soil sample was adjusted to the color of the buffer solution and pH meter. Results showed that color change of soil sediment-water which was dropped by natural pH indicators needed more indicator drops such as 2-3 levels than was color changes caused by the buffer solution.
PENINGKATAN PERTUMBUHAN DAN HASIL PADI BERAS MERAH (Oryza nivara) MELALUI PENAMBAHAN PUPUK NANOSILIKA PADA SISTEM ROOFTOP FARMING Putri, Olivia Damayanti; Sutini, Sutini; Suhardjono, Hadi
Jurnal Agroqua: Media Informasi Agronomi dan Budidaya Perairan Vol 21 No 2 (2023): Jurnal Agroqua
Publisher : University of Prof. Dr. Hazairin, SH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32663/ja.v21i2.4058

Abstract

One type of rice that is rich in potential nutritional content is brown rice, but the production of this type of rice is still far behind compared to other types of rice. Therefore, special efforts are needed to support production, one of which is through the use of superior varieties accompanied by the fulfillment of the right nutrients, especially the Si nutrient. This research aims to determine the effect of adding nanosilica on the growth and yield of red rice. This research used a factorial randomized block design consisting of 2 factors, namely variety (consisting of two levels V1 = Pamera, V2 = Pamelen) and nanosilica concentration (consisting of five levels S0: 0 mL L-1 (control); S1: 7, 5 mL L-1; S2: 10 mL L-1; S3: 12.5 mL L-1; S4: 15 mL L-1.). The results of the research concluded that applying nanosilica colloid to the Pamera and Pamelen varieties at a concentration of 15 mL L-1 was able to increase plant length and number of tillers, as well as speeding up the flowering age of red rice. However, giving nanosilica had no effect on harvest age and yield components.
Co-Authors Bakti Wisnu Widjajani Hadi Suhardjono Pertiwi, Dharmi Wimi Sutini Sutini, Sutini