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Journal : BUANA SAINS

APLIKASI BEBERAPA JENIS NUTRISI DENGAN SUBSTRAT BERBEDA PADA HIDROPONIK RAKIT APUNG BAYAM BRAZIL Jemamu, Karolina; Astutik, Astutik; Anggarbeni, Susilo Ribut; Sumiati, Astri
BUANA SAINS Vol 25, No 1 (2025)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/bs.v25i1.7330

Abstract

This study aimed to investigate the impact of various substrates and nutrients on the growth and yield of Brazilian spinach (Alternanthera sissoo) in a floating raft hydroponic system. The research was used a factorial Completely Randomized Design (CRD) with two factors: substrate type (M) consisting of rice husk charcoal, sphagnum moss, and compost; and nutrient type (A) comprising AB Mix, NPK, and Gandasil D. There were 9 treatment combinations, each replicated 3 times, resulting in a total of 81 plant samples. The observed parameters included time to sprouting, plant height, number of leaves, number of branches, canopy diameter, fresh weight, and dry weight of the plant. The results showed a significant interaction between substrate and nutrient types on the number of branches at 6 weeks after planting, while no interaction was observed for other parameters and the best results were obtained from the combination of rice husk charcoal substrate and AB Mix nutrient. Substrate and nutrient types significantly affected plant growth (height, number of branches, and canopy diameter) and yield (fresh and dry plant weight as well as fresh and dry root weight). Rice husk charcoal and AB Mix nutrient produced the best plant growth and yield up to 6 weeks after planting.
RESPONS MORFOLOGI DAN PRODUKSI CABAI RAWIT (Capsicum frutescens L.) TERHADAP INDUKSI POLIPLOIDI DENGAN KOLKISIN Astutik, Astutik; Sumiati, Astri; Anggarbeni, Susilo Ribut; P.D.K., Maftuh
BUANA SAINS Vol 25, No 3 (2025)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/bs.v25i3.8325

Abstract

Polyploidy induction is a plant breeding strategy to improve agronomic traits. This study aimed to examine the effect of colchicine concentration and immersion duration on the morphological, phenological, and production characteristics of cayenne pepper (Capsicum frutescens L.). The experiment used a Factorial Randomized Block Design with two factors: colchicine concentration (0, 10, 20, 30 ppm) and immersion duration (12, 24 hours), replicated four times. Data were analyzed using two-way ANOVA and the least Significant Difference (LSD) test at ?=5%. The results showed a significant interaction between both factors on plant height, leaf area, flowering time, fruit length, and flesh thickness. The 30 ppm colchicine with 24-hour immersion (K3W2) produced the widest leaves (7.98 cm) but delayed flowering initiation to 80 days after planting (DAP). The highest yield (7.2 tons/ha) was achieved at K3W2, showing a 92% increase compared to the control. Indicated polyploidy resulted in shorter fruits (4.32 cm) but with larger diameter (1.35 cm), thicker flesh (0.044 cm), and fewer seeds (53.75 seeds/fruit). It is concluded that 30 ppm colchicine effectively induces polyploid phenotypic changes in cayenne pepper, increasing yield but reducing generative fertility.