Effect of the Organic and NPK Fertilizers on the Growth and Yield of Sweet Potato (Ipomoea batatas (L) Lam) in the Centre of Côte d’Ivoire

Abstract

In Côte d’Ivoire, the sweet potato is little cultivated but stays however a culture of pension and a food mattering in certain regions. This study was conducted to assess the effect of the application of mineral (NPK 15-15-15, NPK 12-22-22) and organic (poultry manure) fertilizers on yield components of sweet potato (Ipomoea batatas (L) Lam). The experiment was conducted over two years (2016 to 2017) in experimental station of National Center of Agronomic Research (CNRA) of Bouaké in the centre of Côte d'Ivoire. The experiment was conducted following a split plot with 2 factors (variety and fertilizers) and 3 replicates. The main factor was variety with 2 levels (variety Irene and variety TIB-440060) and the subplot was fertilizers application consisted 13 levels (200, 300, 400, 500 kg ha-1 of NPK fertilizers combined 5, 10, 15 t ha-1 of organic fertilizer). Thirteen treatments based on poultry manure (T6, T7), chemical fertilizer NPK 15 15 15 (T1, T3, T4, T5) and NPK 12 22 22 (T8, T10, T11, T12) and their combination (T2 and T9) were tested. The experimental results revealed that that the effects of chemical fertilizer treatments, manure and their combination with mineral fertilizers did not influence the measured parameters. The results also showed that fertilizers improved all the agronomic parameters of sweet potato compared to the control treatment during two years of experiment. However, the Irene variety with a mean weight of 180 g tuberous roots was significantly different from the TIB variety with a mean weight of 138.73 g.
 In the conditions of our study and over the two-year period, producers of sweet potatoes would benefit from using organic fertilizers with the Irene variety.

Tuber Yields Associated with the Production Systems of Sweet Potato (Ipomoea batatas L.) in the Locality of Bini-Dang at Ngaoundere, Cameroon

“…Although no relationship was found between the yield of the two varieties probably related to the small sample size (60), many other studies elsewhere showed that production yields are influenced by variety [15]. Sidiky et al, [16] studied the effects of different doses of mineral fertilizer on the yield of two varieties of potato in Bouaké, central Ivory Coast, and reported that the yield varied from 9.68 to 15.15 t/h depending on the variety and the dose of fertilizer used. This variability in yield according to variety suggests that these varieties have different genotypic [7,13] and are cultivated in the rainy season.…”

EFFECT OF FOLIAR SPRAY WITH DIFFERENT POTASSIUM SOURCES AND ZINC RATES ON GROWTH AND YIELD OF SWEET POTATO (Ipomoea batatas L.).

“…The stimulative effect of potassium in this respect may be attributed to its function in plants which include energy metabolism and enzyme activation on exchange rate and nitrogen activity, as well as its role in enhancing carbohydrates movement and translocation from shoot to storage organs, consequently increase the tuber weight (Marscher, 1995and 2012, as well as Howeler, 2014. In general, potassium is essential for the production of sweet potato which its improvement aerial biomass fresh weight that reflected on high translocation assimilates and accumulated in the store tuber roots (Sidiky et al .,2019). Foliar application of different potassium sources, i.e.…”

"Effects of Different Fertilizers on the Yield and Yield Attributing Parameters of Sweet Potato (Ipomoea Batatas L.) in the Eastern Midhill of Nepal"

“…For these 3 varieties, the best timing to take cuttings from the mother plant in order to get high-yielding planting material was still a mystery. However, research showed that cuttings taken from Anggun 3 at the time of 3-3.5 months after planting (MAP) gave a higher yield (Nurul Atilia Shafienaz, et al [15]). Though inorganic fertilizers help to enhance the vegetative and storage parameters of sweet potatoes, they are not readily available or may be too expensive to use by the poor farmer.…”