ABSTRACT:

The study was conducted for two years, 2017 and 2018 dry season at the Institute for AgriculturalResearch (IAR) Farm, Samaru located 686m above sea level in the Northern Guinea Savanna ofNigeria to investigate the poultry manure fertilization on growth and yield of onion varieties tounder irrigated conditions. Treatments consisted of four (4) levels of poultry manure (0, 2, 4, 6 t ha-1and a Recommended NPK ), three varieties of onion (Red creole, GalmiSpv, Wuyan- Bijimi). All thetreatments were factorial combined and laid out in a randomized complete block design (RCBD)which was replicated 4 times.The result revealed that the use of 6 t ha-1 poultry manure significantlyinfluenced number of leaves, crop growth rate, onion bulb weight and yield. The results indicatedthat plot treated with NPK significantly had more percent rotted and sprouted bulbs during storagecompared to poultry manure plots while the local varieties Wuyan-bijimi and Galmi produced lesspercent rotted bulbs. However, variety Wuyan-bijimi gave the least percentage on sprouted bulbsthan Red Creole and Galmi which gave more sprouted bulbs that were statistically similar. Basedon the result obtained, growing Wuyan-bijimi or Red Creole with application of 6 t ha-1 PM or120:45:45 kg ha-1 NPK are recommended for possible adoption by farmers