Keragaan Agronomi dan Hasil Biji Kacang Hijau pada Lima Dosis Pupuk NPKS di Lahan Sawah: Keragaan Agronomi dan Hasil Biji Kacang Hijau pada Lima Dosis Pupuk NPKS di Lahan Sawah

Mungbean is one of the main commodity which are planted in the dry season after planting rice. Even though having a high marketable value, the productivity of mungbean is still quite low because the farmers rarely provide enough fertilizer dosage and use the low growed seeds which resulted directly to the low quality or productivity. This study aims to determine the response of three mungbean varieties in paddy fields with five levels of NPKS (15:15:15:10) fertilizers. The study was consisted of three varieties (Vima-1, 2, 4) and five doses of NPKS fertilizer (100, 200, 300, 400, 500 kg ha-1). The study was applied to the randomized completely block design with three replications. The results showed that plant height, number of clusters, biomass dry weight, and seed yield ha-1 of mungbean are significant different between Vima-1, Vima-2 and Vima-4 varieties, while the addition of NPKS inorganic fertilizers could increase plant height and root weight. The interactions between varieties and the NPKS fertilizer dosage was experienced in the number of pods and seed weight per plant. The highest yield of mungbean was resulted in Vima-1 (2.18 tons ha-1) whereas the lowest yield was obtained by Vima-2 which resulted in seed 1.42 tons ha-1. The application of inorganic fertilizer NPKS (15:15:15:10) 100 kg ha-1 has quite enough to produce an optimum productivity of mungbean in Malang rice fields.Kacang hijau merupakan salah satu komoditas utama yang ditanam di musim kemarau setelah tanaman padi. Meskipun nilai jual di pasar cukup tinggi namun produktivitas di tingkat petani masih cukup rendah karena petani jarang memberikan pupuk dan sering menggunakan benih dengan kualitas dan produktivitas rendah. Penelitian ini bertujuan untuk mengetahui respon tiga varietas kacang hijau di lahan sawah dengan lima taraf pupuk NPKS (15:15:15:10). Penelitian terdiri dari tiga varietas (Vima 1, 2, 4) dan lima dosis pupuk Phonska (100, 200, 300, 400, 500 kg/ha). Penelitian diterapkan pada rancangan kelompok teracak lengkap dengan tiga kali ulangan. Hasil penelitian menunjukkan bahwa tinggi tanaman, jumlah klaster, bobot biomas, dan hasil biji ha-1 kacang hijau berbeda diantara varietas Vima 1, Vima 2 dan Vima 4, sedangkan penambahan pupuk anorganik NPKS dapat meningkatkan tinggi tanaman dan bobot akar. Interaksi antara varietas dengan takaran pupuk NPKS mempengaruhi jumlah polong dan bobot biji per tanaman. Hasil biji tertinggi diperoleh pada varietas Vima 1, yaitu 2,18 ton ha-1, dan hasil biji terendah diperoleh pada varietas Vima 2, yaitu1,42 ton ha-1. Penambahan pupuk anorganik NPKS Phonska (15:15:15:10) 100 kg ha-1 telah cukup untuk meningkatkan hasil secara maksimal tanaman kacang hijau di lahan sawah daerah Malang