摘要
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 (1<sup>st</sup> July, 7<sup>th</sup> July and 14<sup>th</sup> 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 (1<sup>st</sup>) 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.
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 (1<sup>st</sup> July, 7<sup>th</sup> July and 14<sup>th</sup> 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 (1<sup>st</sup>) 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.
作者
Julius Yirzagla
Peter Quandahor
Iddrisu Yahaya
Olivia Aguriboba Akanbelum
Listowell Aditwin Akologo
John Bokaligidi Lambon
Abdul-Wahab M. Imoro
Kwadwo Gyasi Santo
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)
