Effects of Nitrogen and Phosphorus Fertilizers Rate on Yield and Yield Components of Tef at Adola District, Guji Zone, in Southern Ethiopia

Effects of Nitrogen and Phosphorus Fertilizers Rate on Yield and Yield Components of Tef at Adola District, Guji Zone, in Southern Ethiopia

Yared Tesfaye*, Girma Teshome and Kabna Asefa

Oromia Agricultural Research Institute, (OARI) Bore Agricultural Research Center, P.O. Box.21, Guji-Bore, Ethiopia

American Journal of Agricultural Research

An experiment was conducted at Adola District, Southern Ethiopia to investigate the effect of nitrogen and phosphorus rates on yield and yield components of tef. Four rates of nitrogen (0, 46, 69, 92 kg ha-1) and five rates of phosphorus (0, 23, 46, 69 and 92 kg ha-1) were combined in 4×5 factorial arrangement in randomized complete block design with three replications. Data collected on phenology, growth and yield parameters were analyzed using SAS 9.2 computer software. Analysis of the results revealed that panicle length were highly significant (P<0.01) for the main effect of N. The maximum PL (37.94cm), were recorded at the highest rate of N (92kg ha-1). The interaction of the two fertilizers were also highly significant (P<0.01) for days to 90% maturity (DM) and grain yield (GY) and significantly (P<0.05) affected by number of total tiller (TT),number of productive tiller(NPT)and straw yield (SY).The highest DPE(37.71days) and DM (66.66 days), were obtained from unfertilized (control) treatments. On the other hand, maximum number of total tiller(4.14 per plant),number of productive tiller(3.74 per plant)were recorded from 46/92 kg ha-1 N with 92 kg ha-1 P. Highest straw yield (10676 kg ha-1) and LI (67.41%) were recorded at combined application of 92 kg N with 92 kg P ha-1 while maximum GY (1683kg ha-1) was obtained from combined application of 69 kg N with 69 kg P ha-1. However, the result of economic analysis showed that combined application of 69 kg N and 69 kg N ha-1 gave economic benefit of 46996.75ETB ha-1 with the marginal rate of return of 45585.38%. Therefore, use of 69 kg N and 69 kg P ha-1 can be recommended for production of tef in the study area and other similar agro-ecological conditions.

Keywords:Grain yield; Interaction effect; Partial budget analysis.

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Yared Tesfaye, Girma Teshome and Kabna Asefa. Effects of Nitrogen and Phosphorus Fertilizers Rate on Yield and Yield Components of Tef at Adola District, Guji Zone, in Southern Ethiopia. American Journal of Agricultural Research, 2019, 4:57.


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