- 期刊
- OpenAccess
The effect of nitrogen fertilizer split application on the nitrogen use efficiency, grain yield and economic benefit of maize production
並列摘要
An experiment was conducted at Adet Research station, northwest-Ethiopia in order to determine the influence of the application time of nitrogen fertilizer on two varieties of maize (Zea mays). A split plot design in randomized complete block (RCB), with three replicates was used. Variety was the main plot and fertilizer application time the sub-plot. Intermediate maturing and late maturing maize varieties, BH-540 and BH-660, respectively, were used for the experiment. Ten different times of nitrogen fertilizer application were studied: 1/2 at planting (p) + 1/2 at knee height (k) (control), all at planting, 1/2 p + 1/2 near tasseling (t), 1/3 p + 1/3 k + 1/3 t, 1/3 p + 2/3 k, 1/3 p + 2/3 t, 1/4 p + 2/4 k + 1/4 t, 1/4 p + 1/4 k + 2/4 t, 1/4 p + 3/4 k, and 1/4 p +3/4 t. The same rate of nitrogen, 128 kg N /ha, was used in all the cases. Results obtained indicated that for the intermediate maturing BH-540 variety nitrogen application of 1/3 at planting + 2/3 at knee height was found to produce the highest yield. The application method gave a yield advantage of 1005 kg/ha over the commonly practiced 1/2 at planting + 1/2 at knee height application. Concerning the late maturing variety BH-660, nitrogen application of 1/4 at planting + 3/4 at knee height gave a yield advantage of 296.2 kg/ha over 1/2 at planting + 1/2 at knee height application. The best yielding split applications and timings exhibited the highest agronomic Nutrient Use Efficiencies (NUE) and better economic advantages for the respective varieties.
並列關鍵字
Nitrogen split ； medium maturing ； late maturing ； profitable ； nutrient use efficiency ； zea mays延伸閱讀
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