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Growth, Development and Yield of Kenaf as Affected by Planting Dates and N Fertilization

Open Journal of Applied Sciences 2024年第3期14卷 707-720页

作者： Julius Yirzagla Peter Quandahor Iddrisu Yahaya Olivia Aguriboba Akanbelum Listowell Aditwin Akologo john bokaligidi lambon Abdul-Wahab M. Imoro Kwadwo Gyasi Santo CSIR-SARI Nyankpala Ghana St Vincent College of Education Yendi Ghana Gbewaah College of Education Pusiga-Bawku Ghana CSIR-Head Office Accra Ghana C.K. Tedam University of Technology and Applied Sciences Navrongo Ghana University of Energy and Natural Resources Sunyani Ghana

Kenaf (Hibiscus cannabinus L) consists of various beneficial components like stalks, seeds, leaves, fibers, oils, proteins, allelopathic chemicals, and fiber strands, among other things. Despite the numerous uses of the crop, there is little or no information on optimum agronomic practices such as planting date and N fertilization of the crop in the Upper East Region (UER) of Ghana where the crop is widely cultivated by smallholder farmers. Field experiments were therefore carried out in 2020 and repeated during the 2021 cropping season in the study area. The objective of the study was to determine appropriate planting date and N fertilization for increased kenaf productivity. In each year, the treatments consisted of 3 × 5 factorial combinations of three planting dates (1st July, 7th July and 14th July) and five levels of N (0, 20, 40, 60 and 80 kg/ha) replicated three times. The design of the experiment was a split-plot with the N fertilizer as the main plot and the planting date assigned to sub plot. The results showed that, planting kenaf in early (1st) July or N fertilization at the rate of 60 kg/ha increased plant density, stem height, stem diameter, dry bast and core yields in both cropping seasons.

关键词： Growth Fibres Bast Yield Core Yield

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Yield of Roselle (Hibiscus sabdariffa L.) as Influenced by Manure and Nitrogen Fertilizer Application

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American Journal of Plant Sciences 2023年第5期14卷 599-612页

作者： Julius Yirzagla Peter Quandahor Ophelia Asirifi Amoako Listowel Atiwin Akologo john bokaligidi lambon Abdul-Wahab M. Imoro Kwadwo Gyasi Santo Olivia Aguriboba Akanbelum CSIR-SARI Nyankpala Ghana Gbewaah College of Education Pusiga-Bawku Ghana CSIR-Head Office Accra Ghana TC.K. Tedam University of Technology and Applied Sciences Navrongo Ghana University of Energy and Natural Resources Sunyani Ghana St Vincent College of Education Yendi Ghana

Field experiments were carried out on roselle (Hibiscus sabdariffa L) during the 2019 and 2020 cropping seasons at the CSIR-SARI Research Station at Manga in the Upper East Region of Ghana. The aim of the experiment was to study the response of roselle to cowdung, nitrogen fertilizer and their interaction on the growth and yield of roselle. The treatments consisted of factorial combination of five rates of cowdung (0, 1.5, 2.5, 3.5 and 4.5 t/ha) and five levels of nitrogen (0, 20, 40, 60 and 80 kgN/ha) laid out in a randomized complete block design and replicated three times. Data were collected on days to 50% flowering, plant height, number of leaves per plant and dry calyx yield. The results indicated that differences in dry calyx yield due to the manure and nitrogen fertilizer effects were highly significant (P 0.01). Application rate of 2.5 t/ha manure recorded the highest yield of 340 kg/ha and 308.1 kg/ha in 2019 and 2020 respectively. Increasing manure rate from 2.5 - 3.5 t/ha did not result in significant increases in dry calyx yield. The four rates differed significantly from the control which had the least calyx yield of 190.3 kg/ha and 180 kg/ha in 2019 and 2020 respectively. Nitrogen rate of 60 kg/ha recorded the highest dry calyx yield of 510.5 kg/ha and 370.4 kg/ha in 2019 and 2020 respectively which were significantly different from calyx yields recorded by other treatments. The trend on partial budget analysis was consistent in both seasons with the highest yielding treatments (2.5 t/ha cowdung manure and 60 kg/ha) recording the highest net benefit while the control (0 kg/ha) ranked last. The application rate of 2.5 t/ha of cowdung and 60 kg/ha of Nitrogen is thus recommended for optimum roselle production and productivity in the study area.

关键词： Calyx Yield “Sobolo” Sepals Cowdung Nitrogen Fertilizer

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Maize-Soybean Integration for Managing Striga hermonthica (Del.) Benth in the Sudan Savannah Zone of Ghana

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American Journal of Plant Sciences 2023年第9期14卷 1043-1060页

作者： Olivia Aguriboba Akanbelum Israel K. Dzomeku Julius Yirzagla Abdul-Karim Alhassan john bokaligidi lambon Abdul-Wahab M. Imoro Kwadwo Gyasi Santo St Vincent College of Education Yendi Ghana University for Development Studies Tamale Ghana CSIR-SARI P. O. Nyankpala Ghana CSIR-Head Office Accra Ghana C.K. Tedam University of Technology and Applied Sciences Navrongo Ghana University of Energy and Natural Resources Sunyani Ghana

Field experiments were conducted at Gore near Zebila in Bawku West District of the Upper East Region of Ghana during the 2015 and 2016 cropping season on four Striga tolerant maize varieties in maize/soybean integration alongside maize monocrop as a means of managing the devastating effects of Striga. The study determined the relative Striga tolerance of the maize varieties in terms of yield and yield components, as well as the most effective intercrop for the reduction of Striga seed bank. The treatment differences were not significant (p < 0.05) in affecting plant height, plant population, leaf area index (LAI), Striga count and Striga biomass. Similarly, yield components of maize such as height of cob attachment, cob length, cob weight, 100 seed weight, grain yield, as well as straw weight were not significantly affected by the treatments. There was no relativity of Striga stress tolerance in terms of yield and yield components of the four maize varieties. All the entries efficiently tolerated the biotic stress of Striga and further supported growth and grain yield equally. There was reduced S. hermonthica seed bank production in the soil in both cropping systems. The four maize varieties are proven tolerant materials to Striga infestation and are therefore recommended for long-term Striga seed bank depletion in the study area.

关键词： Striga hermonthica Seed Bank Afayak Suicidal Germination

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