ABSTRACT
The
experiment was carried out in 2019 cropping season at National Root Crops
Research Institute (NRCRI), Umudike, to assess agronomic attributes of sweet
potato varieties (Ipomea batatas (L))
under the application of nitrogen fertilizer (urea). A piece of land was
cleared and thrash packed. It was slashed, ploughed, harrowed and ridged
mechanically with tractor and converted to plots of beds with an Indian hoe
manually. The size of each bed measured 1 m x 1.5 m with a space of 0.5 m
separating the plots and 1m separating the replicates. Thirty three sweet
potato vines each measured 30 cm long and four nodes were planted on each bed
at a spacing of 10 cm x 20 cm resulting to plant population density of 500,000
plants /ha. The experiment was laid out as 5 x 2 factorial in a randomized
complete block design (RCBD). The treatments consisted of two factors, Factor A
comprised of five rates of Nitrogen (Urea) fertilizer (0, 30, 60, 90 and 120 N
kg/ha) whereas factor B consisted of two varieties of oranges fleshed
sweetpotao (Umuspo 1 (king) and Umuspo 4 (solo gold). These two factors
produced ten (10) treatment combinations replicated thrice to a total of thirty
(30) observations. The fertilizer rates were applied to the crops four weeks
after planting (WAP). Data were collected on vine length, number of leave,
number of branches, yield parameter and weight of above ground biomass (kg) and
were subjected to Analysis of Variance (ANOVA) with Genstat (2003) edition
(windows). Significant difference was determined and means separated with
Fisher’s least significant difference (F-LSD) at 0.05 significant level.
Results showed that application of Nitrogen (urea) fertilizer and variety
significantly (p<0.05) affected the number of branches, vine length, number
of leaves, weight of above ground biomass
(kg), number of cuttings (vine yield) at different sampling period, while their
interactions were non-significant. Umuspo 4 variety produced the highest yield
compared to Umuspo 1 variety. Nitrogen fertilizer (urea) application at the
rate of 120kg/ha produced the highest number of vine cuttings.
EUCHARIA, E (2024). Effect Of Different Rates Of Nitrogen (Urea) Fertilizer And Varieties On Growth And Vine Yield Of Sweetpotato (Ipomoea batatas (L).) On A Southeastern Nigeria Ultisol:- Nnorom, Eucharia E. Repository.mouau.edu.ng: Retrieved Sep 07, 2024, from https://repository.mouau.edu.ng/work/view/effect-of-different-rates-of-nitrogen-urea-fertilizer-and-varieties-on-growth-and-vine-yield-of-sweetpotato-ipomoea-batatas-l-on-a-southeastern-nigeria-ultisol-nnorom-eucharia-e-7-2
EZINNE, EUCHARIA. "Effect Of Different Rates Of Nitrogen (Urea) Fertilizer And Varieties On Growth And Vine Yield Of Sweetpotato (Ipomoea batatas (L).) On A Southeastern Nigeria Ultisol:- Nnorom, Eucharia E" Repository.mouau.edu.ng. Repository.mouau.edu.ng, 21 Jun. 2024, https://repository.mouau.edu.ng/work/view/effect-of-different-rates-of-nitrogen-urea-fertilizer-and-varieties-on-growth-and-vine-yield-of-sweetpotato-ipomoea-batatas-l-on-a-southeastern-nigeria-ultisol-nnorom-eucharia-e-7-2. Accessed 07 Sep. 2024.
EZINNE, EUCHARIA. "Effect Of Different Rates Of Nitrogen (Urea) Fertilizer And Varieties On Growth And Vine Yield Of Sweetpotato (Ipomoea batatas (L).) On A Southeastern Nigeria Ultisol:- Nnorom, Eucharia E". Repository.mouau.edu.ng, Repository.mouau.edu.ng, 21 Jun. 2024. Web. 07 Sep. 2024. < https://repository.mouau.edu.ng/work/view/effect-of-different-rates-of-nitrogen-urea-fertilizer-and-varieties-on-growth-and-vine-yield-of-sweetpotato-ipomoea-batatas-l-on-a-southeastern-nigeria-ultisol-nnorom-eucharia-e-7-2 >.
EZINNE, EUCHARIA. "Effect Of Different Rates Of Nitrogen (Urea) Fertilizer And Varieties On Growth And Vine Yield Of Sweetpotato (Ipomoea batatas (L).) On A Southeastern Nigeria Ultisol:- Nnorom, Eucharia E" Repository.mouau.edu.ng (2024). Accessed 07 Sep. 2024. https://repository.mouau.edu.ng/work/view/effect-of-different-rates-of-nitrogen-urea-fertilizer-and-varieties-on-growth-and-vine-yield-of-sweetpotato-ipomoea-batatas-l-on-a-southeastern-nigeria-ultisol-nnorom-eucharia-e-7-2