Respon Pertumbuhan Tebu (Saccharum officinarum L.) terhadap Pemberian Pupuk Anorganik pada Pembibitan Bud Set

Abstract

AHMAD NASHIH ROFI’I. Respon Pertumbuhan Tebu (Saccharum officinarum L.) terhadap Pemberian Pupuk Anorganik pada Pembibitan Bud Set. Dibimbing oleh UNDANG.

Penelitian ini bertujuan untuk menentukan dosis optimum pupuk anorganik pada pembibitan bud set tebu. Penelitian menggunakan rancangan kelompok lengkap teracak (RKLT) dua faktor, yaitu varietas tebu (PSNX 052 dan Bululawang) serta dosis pupuk anorganik (25%, 50%, 100%, 125%, dan 150% dosis rekomendasi Kementerian Pertanian). Parameter yang diamati meliputi daya tumbuh, tinggi tanaman, diameter batang, jumlah daun, jumlah anakan, bobot basah akar, dan bobot kering akar. Data dianalisis menggunakan ANOVA dan uji DMRT taraf 5%. Hasil penelitian menunjukkan bahwa pupuk anorganik berpengaruh nyata terhadap pertumbuhan bibit tebu. Varietas PSNX 052 menunjukkan pertumbuhan yang lebih baik dibandingkan Bululawang pada sebagian besar parameter. Dosis pupuk 125% menghasilkan pertumbuhan terbaik pada diameter batang, jumlah daun, jumlah anakan, bobot basah akar, dan bobot kering akar, sedangkan tinggi tanaman tertinggi diperoleh pada dosis 150% yang tidak berbeda nyata dengan dosis 125%. Oleh karena itu, dosis pupuk anorganik 125% direkomendasikan sebagai dosis optimum pada pembibitan bud set tebu.

Kata kunci: bud set, pupuk anorganik, varietas BL, varietas PSNX 052

AHMAD NASHIH ROFI’I. Growth Response of Sugarcane (Saccharum officinarum L.) to Inorganic Fertilizer Application in Bud Set Seedling Production. Supervised by UNDANG.

This study aimed to determine the optimum dosage of inorganic fertilizer for sugarcane bud set seedling production. The experiment was arranged in a two-factor Randomized Complete Block Design (RCBD), consisting of sugarcane varieties (PSNX 052 and Bululawang) and inorganic fertilizer dosages (25%, 50%, 100%, 125%, and 150% of the recommended rate by the Ministry of Agriculture). The observed parameters included germination percentage, plant height, stem diameter, number of leaves, number of tillers, fresh root weight, and dry root weight. Data were analyzed using Analysis of Variance (ANOVA) followed by Duncan’s Multiple Range Test (DMRT) at the 5% significance level. The results showed that inorganic fertilizer significantly affected sugarcane seedling growth. The PSNX 052 variety exhibited better growth performance than the Bululawang variety for most observed parameters. The 125% fertilizer dosage produced the highest stem diameter, number of leaves, number of tillers, fresh root weight, and dry root weight, while the greatest plant height was obtained at the 150% dosage, which was not significantly different from the 125% dosage. Therefore, the 125% inorganic fertilizer dosage is recommended as the optimum rate for sugarcane bud set seedling production.

Keywords: bud set, Bululawang variety, inorganic fertilizer, PSNX 052 variety