ABSTRAKPenelitian bertujuan untuk mengevaluasi penampilan produksi tanaman arbila berinokulum dan sorgum yang ditanam secara tumpangsari pada jarak tanam arbila dan jumlah baris sorgum yang berbeda, telah dilaksanakan selama 4 bulan, dirancang dengan rancangan acak lengkap pola faktorial dengan 2 faktor perlakuan. Faktor pertama yaitu jarak tanam arbila (I): J1 (120 cm), J2 (180 cm). Faktor kedua adalah jumlah baris sorgum (P) yaitu P1 (1 baris), P2 (2 baris), P3 (3 baris), yang diulang sebanyak 3 kali. Variabel yang diamati adalah produksi bahan kering (BK), produksi bahan organik (BO), produksi protein kasar (PK), dan nilai Land Equivalent Ratio (LER). Hasil penelitian menunjukkan bahwa produksi BO tertinggi pada J1P2 dan J1P3 yaitu 5,33 dan 4,53 ton/ha, produksi BO tertinggi pada J1P2 dan J1P3 yaitu 5,33 dan 4,57 ton/ha, sementara J1P1, J1P2 dan J1P3 menhghasilkan produksi PK yang lebih tinggi yaitu 0,55, 0,77 dan 0,55 ton/ha. Nilai LER tertinggi pada J1P2 dan J1P3 yaitu 2,53 dan 2,38. Disimpulkan bahwa pada tumpangsari arbila dan sorgum, jarak tanam arbila 120 cm dengan jumlah baris sorgum sebanyak 2 dan 3 menghasilkan produksi hijauan terbaik sebagai pakan ruminansia.Kata kunci : Phaseolus lunatus, sorgum, tumpangsari, jarak tanam, jumlah baris, hijauan Forage Production of Intercropping Arbila (Phaseolus lunatus) Added Rhizobium Inoculant and Sorghum (Sorghum bicolor) at Different Spacing Arbila and Row Number of Sorghum ABSTRACT The study was conducted to evaluate the forage production of arbila (Phaseolus lunatus) and sorghum (Sorghum bicolor) in intercropping grown on different spacing of arbila and number row of sorghum, and was designed as completely randomized design of factorial pattern with two factors. The first factor was the spacing of arbila (J) i.e. J1 (120 cm) and J2 (180 cm). The second factor was row number of sorghum (P) i.e. P1 (1 row), P2 (2 rows), P3 (3 rows) with 3 replications. The variables were dry matter (DM) production, organic matter (OM) production, crude protein (CP) production of forage, and Land Equivalent Ratio (LER).The results showed that highest DM production at J1P2 and J1P3 (5.33 and 4.53 tons/ha), highest OM production at J1P2 and J1P3 (5.33 and 4.57 tons/ha), highest CP production at J1P1, J1P2 and J1P3 (0.55, 0.77, and 0.55 tons/ha), and highest LER at J1P2 and J1P3 (2.53 and 2.38). It can be concluded that the intercropping arbila and sorghum at planting space of 120 cm with 2 and 3 row of sorghums between arbilas produces the best forage production as ruminant feed.
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