Pengaruh Pupuk Kasgot Dan Tinggi Pemotongan Awal Terhadap Morfologi, Produksi Biomassa, Kualitas Nutrien Orok-Orok (Crotalaria juncea L.) Regrowth Pertama

Ghulam Miftahussalam, Prof. Dr. Ir. Bambang Suhartanto, DEA., IPU.; Prof. Ir. Nafiatul Umami, S.Pt., M.P., Ph.D., IPU., ASEAN Eng.

2026 | Tesis | S2 Ilmu Peternakan

Penelitian ini bertujuan untuk mengetahui pengaruh pupuk kasgot dan tinggi pemotongan awal terhadap morfologi, produksi biomassa, dan kualitas tanaman orok-orok (Crotalaria juncea L.) pada regrowth pertama. Penelitian menggunakan rancangan acak kelompok (RAK) pola faktorial 2x3 yang terdiri dari 2 level pemupukan kasgot 0 dan 5.000 kg/ha dan 3 tinggi pemotongan awal 30, 45 dan 60 cm. Kombinasi perlakuan diulang 4 kali sehingga terdapat 24 petak. Biji orok-orok ditanam pada petak lahan berukuran 1,1x1,2 m dengan jarak antar petak 50 cm, dan jarak tanam 20x30 cm. Variabel yang diamati meliputi morfologi tanaman yaitu tinggi tanaman, panjang tanaman, jumlah daun, jumlah cabang, diameter batang, tinggi cabang pertama, dan produksi biomassa segar dan bahan kering, kandungan nutrien meliputi bahan kering, bahan organik, protein kasar, dan kecernaan in vitro bahan kering dan organik. Data penelitian dianalisis menggunakan analysis of variance (ANOVA) dan perbedaan antara rerata diuji dengan Duncan’s multiple range test (DMRT). Hasil penelitian menunjukkan bahwa pemupukan kasgot 5.000 kg/ha memberikan hasil lebih tinggi (P<0>Crotalaria juncea L.) pada regrowth pertama yang diberi pupuk kasgot 5.000 kg/ha dan tinggi pemotongan 30 cm.

This study aimed to determine the effects of cassava pulp fertilizer and initial cutting height on the morphology, biomass production, and quality of orok-orok (Crotalaria juncea L.) plants during the first regrowth. The study used a 2x3 factorial randomized block design (RBD) consisting of two levels of kasgot fertilization (0 and 5.000 kg/ha) and three initial cutting heights (30, 45, and 60 cm). The treatment combinations were replicated four times, resulting in 24 plots. The orok-orok seeds were planted in plots measuring 1.1 x 1.2 m with a spacing of 50 cm between plots and a planting spacing of 20 x 30 cm. The observed variables included plant morphology-specifically plant height, plant length, number of leaves, number of branches, stem diameter, height of the first branch, and fresh and dry matter biomass production as well as nutrient content, including dry matter, organic matter, crude protein, and in vitro digestibility of dry and organic matter. The research data were analyzed using analysis of variance (ANOVA), and differences between means were tested using Duncan’s multiple range test (DMRT). The results of the study showed that applying 5.000 kg/ha of kasgot fertilizer yielded higher yields (P<0>Crotalaria juncea L. plants during the first regrowth, which were fertilized with 5.000 kg/ha of kasgot and cut at a height of 30 cm.

Kata Kunci : Crotalaria juncea, Level pemotongan, Morfologi tanaman, Produksi biomassa, Pupuk kasgot, Regrowth pertama