| dc.description.abstract |
Soil fertility depletion and the unavailability of nutrients due to a decline in soil organic matter
content and improper fertilizer application are limiting bread wheat productivity in Ethiopia.
Hence, a field experiment was conducted in 2023 to determine the effects of integrated use of
vermicompost and inorganic fertilizer (NPS and urea) on soil physicochemical properties,
yield, and yield components of bread wheat in the Vertisol of Mekaneselam District, North-East
Ethiopia. A factorial combination of four levels of vermicompost (0, 3, 6, and 9 t ha
) and three
levels of inorganic fertilizer (NPS and urea) (0%, 50%, and 100% kg ha
xv
-1
) from the blanket
recommendation of 120 kg ha
-1
of NPS and 100 kg ha
-1
of Urea fertilizers for wheat growing
in the study area. The experiment was laid out in a randomized complete block design with
three replications. All collected soil data, yield, and yield components of bread wheat data were
analyzed using SAS software. After the bread wheat harvest, the soil analysis of variance
showed that the soil bulk density (BD), moisture content (MC), soil pH (pH), soil organic
carbon (SOC), total nitrogen (TN), available phosphorus (Av.P), cation exchange capacity
(CEC), and exchangeable calcium (Ex.Ca) were significantly (p<0.05) affected by the
combined application of vermicompost and inorganic fertilize (NPS and urea). The highest MC
(46%), pH (6.77), Av.P (19.26 ppm), TN (0.27%), CEC (29.77 cmolc kg
-1
), and SOC (2.84%)
were obtained from the application of 6 and 9 t ha
-1
vermicompost with 100% ha
of inorganic
fertilizer and 9 t ha
-1
vermicompost with 50% (combined fertilizer of NPS and urea). However,
the lowest MC (40.67%), pH (5.87), Av.P (10.57 ppm), TN (0.18%), CEC (21.00 Cmolc kg
),
and SOC (1.68%) were obtained from the control plot (0% inorganic fertilize (NPS and urea)
with 0 t ha
-1
vermicompost). The results of bread wheat analysis showed that the grain yield,
thousand-grain weight, number of seeds per spike, number of effective tillers, and harvest index
were significantly (p<0.05) affected by the combined application of vermicompost and
-1
-1
-1
inorganic fertilize (NPS and urea). The maximum bread wheat grain yield (4066.67 kg ha
),
thousand-grain weight (52.67 g), number of seeds per spike (49.8), number of effective tillers
(426.35 m
2
), and harvest index (40.43%) were obtained from the use of 6 t ha
vermicompost
with 50% ha
-1
of inorganic fertilize (NPS and urea). However, the minimum grain yield (1900
kg ha
-1
), thousand seed weight (42g), number of seeds per spike (30.33), number of effective
tillers (292.67 m
2
), and harvest index (26.4%) were obtained from the control plot (0%
inorganic fertilize (NPS and urea) with 0 t ha
-1
vermicompost). Moreover, the combined
application of 6 t ha
-1
vermicompost with 50% inorganic fertilize (NPS and urea) produced the
highest bread wheat grain yield and maximum net benefit with a marginal rate of return
(965.75%), while the sole application of 50% inorganic fertilizes (NPS and urea) provided the
highest marginal rate of return (1241.66%). Thus, it can be concluded that the combined
applications of 6 t ha
-1
vermicompost and 50% ha
-1
of inorganic fertilize (NPS and urea) were
the most recommended and economically feasible for bread wheat production and soil fertility |
en_US |