Determination of NPSB Fertilizer Type Rate and Nutrient Use Efficiency of Maize (Zea Mays L.) at Yeki District, Southwest of Ethiopia
Résumé
In Sheka Zone, including Yeki District, maize (Zea mays L) yields are low because of low soil fertility, little and blanket fertilizer use.This field experiment conducted to evaluate NPSB fertilizer during 2018.The treatments laid out in a randomized complete block design with four replications.The treatments consisted of three NPSB levels (150, 200, and 250) combined with two-urea levels (100 and 150) kg ha -1 and two controls (200 urea + 150 TSP kg ha -1 and no fertilizer as control).Plant height and the number of ears per plant were not significantly (p 0.05) influenced as compared to the control and blanket recommended NP fertilizer.Whereas ear height, ear length, and cob length influenced as compared to the control and thousand-grain weight, grain yield, and biomass yield were significantly (p 0.05) influenced as compared to the control and recommended NP fertilizer.The highest maize grain yield (8828.2 kg ha -1 ) was obtained from the application of 250 NPSB + 100 Urea + 100 KCl, while the lowest grain yield (2968.90 kg ha -1 ) was from the control plot.Application of NPSB and urea improved the nutrient use efficiency of maize, except for physiological nitrogen and phosphorus use efficiency.Economically, the highest net benefit (13445.3EB) obtained under the application of 150 NPSB + 100 urea + 100 KCl kg ha -1 .Therefore, application of NPSB at a rate of 150NPSB + 100 urea + 100 KCl kg ha -1 recommended for maize production in Yeki District.
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