Respon Tanaman Kelapa Sawit terhadap Pemberian Kombinasi Pupuk N Cair dan Air Kelapa pada Pre-Nursery

Abstract

Pemupukan merupakan salah satu faktor penting dalam pertumbuhan prenursery kelapa sawit. Pemupukan menggunakan kombinasi pupuk N cair dan air kelapa diharapkan dapat meningkatakan pertumbuhan pada fase pre-nursery kelapa sawit. Penelitian ini bertujuan menganalisis respon pertumbuhan tanaman kelapa sawit pada pre-nursery terhadap pemberian kombinasi pupuk N cair dan air kelapa. Percobaan dilakukan di Kebun Percobaan Cikabayan Bawah Institut Pertanian Bogor. Rancangan percobaan ini menggunakan rancangan kelompok lengkap teracak (RKLT) dengan satu faktor, yaitu kombinasi pupuk N cair dan air kelapa. Kombinasi pupuk N cair dan air kelapa yang digunakan terdiri dari enam taraf, yaitu kontrol (P0), pembanding (P1), pupuk urea 0,5 g dan air kelapa 250 mL (P2), pupuk urea 0,5 g dan air kelapa 500 mL (P3), air kelapa 250 mL (P4), air kelapa 500 mL (P5). Hasil penelitian menunjukan bahwa pemberian perlakuan kombinasi air kelapa dan pupuk N cair pada percobaan ini belum dapat meningkatkan respon pertumbuhan pre-nursery tanaman kelapa sawit. Dibuktikan dengan perlakuan 1 g urea serta kombinasi 0,5 g urea dan air kelapa 250 mL menunjukkan hasil tidak berbeda nyata dengan perlakuan kontrol serta perlakuan air kelapa 500 mL menunjukkan bahwa perlakuan menghambat pertumbuhan tanaman kelapa sawit.

Fertilization is a crucial factor in the growth of oil palm seedlings during the pre-nursery stage. The application of a combination of liquid nitrogen (N) fertilizer and coconut water is expected to enhance growth at this phase. This study aims to analyze the growth response of oil palm seedlings in the pre-nursery stage to the application of liquid N fertilizer combined with coconut water. The experiment was conducted at the Cikabayan Experimental Farm, Bogor Agricultural University. The experimental design used was a Randomized Complete Block Design (RCBD) with a single factor, namely the combination of liquid N fertilizer and coconut water. The treatments consisted of six levels control (P0), standard urea application (P1), 0.5 g of urea with 250 ml of coconut water (P2), 0.5 g of urea with 500 ml of coconut water (P3), 250 ml of coconut water (P4), and 500 ml of coconut water (P5). The results showed that the application of the combination of coconut water and liquid N fertilizer did not significantly improve the growth response of oil palm seedlings in the pre-nursery phase. This was indicated by the fact that the treatments with 1 g of urea and the combination of 0.5 g of urea with 250 ml of coconut water did not differ significantly from the control, while the treatment with 500 ml of coconut water was found to inhibit seedling growth.