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Journal : Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering)

Effect of IAA Addition and Some Organic Supplements on Growth and Rooting of Cavendish Banana (Musa Acuminata, AAA) In-Vitro Riza Intikhatus Sholikhah; Makhziah Makhziah; Widiwurjani Widiwurjani
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 11, No 2 (2022): June
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v11i2.266-278

Abstract

In vitro propagation of Cavendish banana is an alternative to produce healthy, uniform and sufficient plant materials of high qualities. Appropriate culture media formulation is needed for shoot growth and rooting stage. This experiment aimed to study effects of IAA and organic supplements on in vitro shoot growth and rooting. Explants were subjected to MS medium with IAA and various organic supplements, in a factorial arrangement of a completely randomized design. The first factor was IAA concentrations (0; 0.5; 1 and 1.5 mg.L-1), and the second factor was types of organic supplement (control, coconut water, potato extract and banana extract). At 8 weeks after planting, shoot growth and root performance of plantlets were recorded. The results showed that addition of IAA did not affect shoot height. Addition of potato extract and banana homogenate resulted in the highest plantlets. Medium with IAA at 1 mg.L-1 resulted in the highest number of roots. The highest number of shoots was produced on media with IAA 1 mg.L-1 + coconut water and IAA 1.5 mg.L-1 + potato extract. The highest number of roots was produced in medium with potato extract. The longest roots were produced in media with 0.5 mg.L-1 IAA + banana homogenate. Keywords: Banana extract, Cavendish, Coconut water, IAA, Potato extract
Growth and Yield Response of Sunflower (Helianthus annuus L.) Plants to Paclobutrazol Dosage and Application Time Fitriyah, Fitriyah; Hidayat, Ramdan; Widiwurjani, Widiwurjani
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 5 (2025): October 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i5.1819-1828

Abstract

Sunflower (Hellianthus annuus L.) has high economic value due to its great potential in industry. High market demand causes the need for intensification in sunflower cultivation to increase production and seed quality. This study aims to determine the right dosage and time of paclobutrazol application in suppressing growth and increasing the yield of sunflower plants. The research was conducted in Dohoagung Village, Balongpanggang District, Gresik Regency from May to September 2024. This research used a Factorial Completely Randomized Design (CRD) with 2 factors, namely dose and application time. The two treatments resulted in 12 combinations, each of which was repeated three times. The results of the analysis of variance were further tested with the 5% HSD test.  The results show that the combination of paclobutrazol dosage of 0.3 g/plant and application time of 4 WAP gives the best results on plant growth (plant height and stem diameter). The single treatment of paclobutrazol dosage of 0.2 g/plant gave the best results on flower diameter, number of seeds, total seed weight and 100 seed weight. A single treatment of paclobutrazol application time at 4 WAP produced the best plant growth and increased flower diameter.