The effect of NPK 15-15-6-4 compound fertilizer on corn growth and yield

Abstract

The availability of NPK compound fertilizer is expected to help farmers to optimally supply the nutrient needs of corn plants. The aim of the study was to determine the efficient dose of NPK 15-15-6-4 fertilizer and its combination with urea on the growth and yield of corn. The study was conducted in Simbang Village, Simbang District, Maros Regency, South Sulawesi in January - April 2019. The study used a Randomized Complete Block Design (RCBD) with a combination of 7 treatments with four replications, consisting of: (P1) 400 kg NPK 15-15-6-4; (P2) 400 kg NPK 15-15-6-4 + 100 kg urea; (P3) 400 kg NPK 15-15-6-4 + 150 kg urea; (P4) 450 kg NPK 15-15-6-4; (P5) 350 kg NPK 15-15-6-4; (P6) 350 kg NPK 15- 15-6-4+ 150 kg urea; (P7) 150 kg NPK Phonska + 250 kg urea. The results showed that NPK 15-15-6-4 compound fertilizer had a good effect on the growth and yield of corn plants. NPK 15-15-6-4 compound fertilizer at a dose of 450 kg/ha and a dose of 400 kg NPK 15-15-6-4 + 100 kg urea gave the best effect with total yield up to 5.5-5.9 ton/ha.

The effect of balanced N, P, K, Ca, Mg fertilizer on soil and leaf nutrient and its correlation with growth and corn yield (Zea mays L.)

“…Leaf P was positively correlated with cob weight with husk (r=0.379*), cob weight without husk (r=0.454**), cob length (r=0.506**), and cob diameter (r=0.353*). As Sudding et al (2021) stated, N and P elements are absorbed mainly by plants in the generative phase and seed filling, where seed density is closely related to cob length and diameter. Fruit formation is influenced by N and P but not K (Erel et al, 2008).…”

“…The benchmark in knowing the response of fertilization to plant vegetative growth can be seen from plant height, stem diameter, and number of leaves (Sudding et al, 2021). NPK fertilizer is needed to increase plant height during growth, enlarge stem diameter, and form roots to support the plant to stand upright (Hasan et al, 2020).…”

Respon Pertumbuhan dan Hasil Jagung Manis (Zea mays Saccharata Sturt L.) terhadap Pupuk Organik Cair Asal Limbah Buahan dan NPK di Lahan Kering

“…Menurut Kim et al (2015) dan Jayasundara et al (2016), POC asal limbah buahan dapat diterapkan untuk menyuburkan tanah, memulihkan ekosistem tanah dan memperbaiki nutrisi tanah. Sedangkan menurut Sudding et al (2021) dan Firmansyah et al (2017), unsur hara NPK 300 kg.ha -1 juga saling mendukung satu sama lain dalam proses fotosintesis dan hasil fotosintesis serta meningkatkan pertumbuhan tanaman melalui mekanisme pengubahan nutrisi NPK menjadi senyawa organik atau energi melalui metabolisme. Ditambahkan oleh Nurnawati et al (2022), bahwa dengan tambahan pupuk organik cair pada tanaman jagung ungu mampu mengurangi pemakaian pupuk anorganik sebesar 25%.…”

“…Terendahnya pertumbuhan dan produksi jagung manis pada tanpa POC dengan pupuk NPK 100 kg.ha -1 menunjukkan bahwa tanaman jagung manis kekurangan unsur hara NPK dan tanah yang tidak diberi POC menyebabkan kurang adanya perbaikan sifat fisik, kimia dan biologi tanah dan tidak didukung oleh keberadaan unsur hara NPK dan lainnya di dalam tanah sehingga akar tanaman jagung tidak leluasa berkembang dalam menyerap unsur hara dan berdampak terhambatnya pertumbuhan dan produksi yang dicapai. Hal ini didukung oleh Sudding et al (2021), jika ketiga nutrisi ini kurang tersedia, atau tersedia tetapi tidak seimbang, pertumbuhan dan perkembangan tanaman akan menjadi terhambat.…”