Evaluasi Pertumbuhan dan Produktivitas Sorgum Mutan Brown Midrib (Sorghum bicolor L. Moench) Fase Pertumbuhan Berbeda sebagai Pakan Hijauan pada Musim Kemarau di Tanah Ultisol

R. Sriagtula, S. Sowmen

Abstract


Penelitian ini bertujuan untuk mengevaluasi pertumbuhan dan produksi biomasa beberapa galur sorgum mutan BMR fase pertumbuhan berbeda sebagai pakan hijauan di tanah ultisol pada musim kemarau. Penelitian ini menggunakan Rancangan Acak Kelompok pola Faktorial (6 x 3) dengan 3 ulangan. Faktor pertama adalah galur sorgum mutan BMR : galur Patir 3.1 (non BMR/kontrol), Patir 3.2, Patir 3.3, Patir 3.5, Patir 3.6 dan Patir 3.7, sedangkan faktor kedua adalah waktu panen : fase berbunga, fase soft dough dan fase hard dough. Parameter yang diamati adalah tinggi tanaman, diameter batang, lebar dan panjang daun, rasio daun, batang dan malai, produksi boimasa segar, produksi bahan kering. Hasil penelitian menunjukkan pertumbuhan galur sorgum mutan BMR secara umum  hampir sama dengan galur sorgum mutan non BMR pada musim kemarau, terlihat pada parameter tinggi tanaman, diameter batang, lebar daun, proporsi daun  batang malai, kandungan gula batang, produksi segar dan produksi bahan kering yang memberikan pengaruh berbeda tidak nyata. Waktu panen hard dough menghasilkan pertumbuhan tertinggi pada parameter tinggi tanaman, proporsi malai dan produksi BK. Dari penelitian ini dapat disimpulkan bahwa terjadi penurunan pertumbuhan dan produksi tanaman galur sorgum mutan BMR pada musim kemarau.


Keywords


pertumbuhan tanaman; produksi biomasa; sorgum brown midrib

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DOI: https://doi.org/10.25077/jpi.20.2.130-144.2018

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