Skripsi

OPTIMALISASI PENGGUNAAN PUPUK ORGANIK CAIR PADA PERTUMBUHAN DAN HASIL TANAMAN KALE DWARF CURLY (Brassica oleracea var. acephala) DI LAHAN PERKOTAAN

---

Kale (Brassica oleracea var. acephala) is a nutrient dense leafy vegetable with strong potential to be developed as a functional food source. This study aimed to determine the appropriate dosage for dwarf curly kale (Brassica oleracea var. acephala) in urban cultivation, with the primary focus on minimizing the use of chemical fertilizers. The experiment was conducted from September to November 2025 in Jakabaring District, Palembang City. A randomized block design (RBD) was applied with four LOF doses: P₁ = 3 mL L⁻¹, P₂ = 6 mL L⁻¹, P₃ = 9 mL L⁻¹, and P₄ = 12 mL L⁻¹, with three replications (12 experimental units) and 36 plants in total. Data were analyzed using ANOVA followed by the 5% LSD test (R-studio). The analysis of variance showed that LOF application within the tested dose range had no significant effect on kale growth and yield parameters. This lack of significant response was attributed to the growing medium used in the study, which had already provided sufficient baseline nutrients for kale growth, thereby yielding no statistically detectable differences. Treatment P₄ (12 ml/L) tended to produce the highest values across most growth and yield parameters, while P₂ (6 ml/L) demonstrated comparable performance on several key parameters, including total leaf area (7.3 dm²), fresh leaf weight (47.1 g), leaf length growth rate (14.5 cm), and leaf width (10.6 cm). The best-fit leaf area estimation model was derived through zero-intercept linear regression using the predictor of leaf length × leaf width (R² = 0.9803), confirming a very strong relationship between leaf dimensions and leaf area in dwarf curly kale. A growth stagnation phase observed in leaf blade and petiole elongation between 23–27 days after transplanting (DAT) provides a practical indicator for determining the optimal harvest time. Among the environmental parameters, soil moisture showed a significant effect, with the highest mean recorded under P₄ (10.79%). Leaf temperature and soil temperature exhibited consistent patterns across all treatments. Soil temperature was consistently higher than leaf temperature, as soil has a greater capacity to absorb and retain heat. Leaf temperature tended to be lower due to the cooling effect of transpiration and heat exchange with the surrounding air. Overall, the findings of this study indicate that in the context of urban agriculture using nutrient-rich growing media, the application of LOF at a dosage of 6 ml/L is sufficient to maintain adequate kale productivity while minimizing fertilizer input requirements and associated costs.

---

Availability

Detail Information

Series Title

-

Call Number

T1976562026

Publisher

Indralaya : Prodi Agroekoteknologi, Jurusan Budidaya Pertanian, Fakultas Pertanian Universitas Sriwijaya., 2026

Collation

xii, 40 hlm.; ilus.; tab.; 29 cm.

Language

Indonesia

ISBN/ISSN

-

Classification

635.340 7

Content Type

Text

Media Type

unmediated

Carrier Type

-

Edition

-

Subject(s)

Hortikultura
Prodi Agroekoteknologi

Specific Detail Info

-

Statement of Responsibility

KA

Other version/related

File Attachment

Comments

---

You must be logged in to post a comment