EFFECT OF NPK FERTILIZER ON GROWTH AND GRAIN YIELD OF SWEET SORGHUM (Sorghum bicolor (L) Moench cv. saccharatum) VARIETIES IN NORTHERN GUINEA SAVANNA OF NIGERIA

Author(s): Muhammad A.N, Lawal A. B., Ishaya D. B
Volume/Issue: Volume 3 , Issue 1 (2023)

ABSTRACT:

Field trials were conducted to study the response of sweet sorghum varieties to varying NPK fertilizer rates during 2018 rainy season at the research farm of Institute for Agricultural Research (IAR) Ahmadu Bello University, Samaru and the research farm of College of Agriculture and Animal Science, Division of Agricultural Colleges (DAC) Mando, both located in the Northern Guinea Savannah ecological zone of Nigeria. The treatments consisted of four NPK fertilizer rates (0:0:0, 30:15:15, 60:30:30, and 90:45:45) and three sweet sorghum varieties (NTJ-2-exotic, SW-Bungudu and SW-Daura) which were laid out in a Randomized Complete Block Design (RCBD) replicated three times. Results indicated that NPK rates had high and significant effects on growth and yield components. It was observed that all growth parameters increased with increasing NPK fertilizer rate from 0:0:0 to 90:45:45 kg NPK ha-1 and the highest significant yields were recorded with the application of 90:45:45 kg NPK ha-1 followed by 60:30:30 kg NPK ha-1. Varieties significantly differed in all growth and yield components. SW-Bungudu was the tallest variety (159cm and 167cm) and NTJ-2 was the shortest (145.71 and 153.34cm) at both locations, respectively. NJT-2 recorded the highest grain yield (1.39 t ha-1 and 1.47 t ha-1) at both locations. Significant interaction was observed on number of leaves, number of grains per panicle and grain yield where the combined effects of the two factors resulted in highest values for these characters. Thus, the finding of this research recommended the adoption of the exotic variety NTJ-2 with the application of 90:45:45 kg ha-1 NPK fertilizer by farmers in the northern guinea savanna for sustainable sweet sorghum grain production.

KEYWORDS:

Sweet sorghum; NPK; growth; yield; NTJ-2, SW-Bungudu; SW-Daura; Savanna.