The effect of liquid NPK fertilizing on corn plants

Abstract

The study aimed to determine the effectiveness of liquid NPK fertilizer on the growth and yield of corn plants. The research was carried out in lowland at Malang Regency on DS II the 2018 with research plots of 6 m x 4 m compiled with randomized block design, 4 times, namely, A: no fertilization, B: 300 kg Urea/ha + 50 kg SP-36/ha + 200 kg Ponska/ha (comparison), C: 300 kg Urea/ha + 50 kg SP-36/ha + 3 ml liquid NPK/l water, D: 300 kg Urea/ha + 50 kg SP-36/ha + 4 ml liquid NPK/l water, E: 300 kg Urea/ha + 50 kg SP-36/ha + 5 ml liquid NPK/l water, F: 300 kg Urea/ha + 50 kg SP-36/ha + 6 ml liquid NPK/l water, G: 300 kg Urea/ha + 50 kg SP-36/ha + 7 ml liquid NPK/l water, and H: 300 kg Urea/ha + 50 kg SP-36/ha + 8 ml liquid NPK/l water. The results showed that liquid NPK fertilizer 4 ml/l water/application (6 applications) combined of 300 kg Urea/ha + 50 kg SP-36/ha (D treatment) was effective in increasing yield by 9.10 t/ha dry grains and had R/C ratio 3.55 so that it is economically feasible.