The effect of different planting methods on the yield and spad readings of sweet potato (Ipomoea batatas L.)

Abstract

A small-plot field experiment was established to examine the sweet potato variety Ásotthalmi 12 in the case of various planting methods on chernozem soil in 2017. The obtained experimental results showed that, by using appropriate agrotechnical solutions, sweet potato can be successfully grown with favourable yields also in Hungary (the marketable tuber yield was between 23.2-50.7 t ha-1). As opposed to bibliographical references, higher yields were obtained in flat planting than in ridge planting at both row spacing values -1.0 m (32.2 t ha-1 and 23.2 t ha-1, respectively) and 0.75 m (50.7 t ha-1 and 39.4 t ha-1). The 0.75 m row spacing was more favourable than 1.0 m. The proportion of non-marketable tubers was also more favourable (lower) in flat planting (9.97-10.9%) than in ridge planting (13.03-15.57%). During the growing season, the SPAD readings of the sweet potato leaves increased between July and August, reaching their peak in mid-August (39.61-50.31). SPAD readings decreased until harvesting (38.89-43.31 on 7th October). Positive correlation was observed between the marketable tuber yield and SPAD readings on 10th July (0.632xx) and 21st July (0,664xx).

Potential use of sweet potato leaves for human consumption

“…As to total chlorophyl contents, genotypes UFVJM-58, cultivar Princess, cultivar Uruguaiana, and UFLA-1472 presented the highest values, ranging from 49.77 to 54.37 (Table 3). Also for sweet potato, Pepó (2018) reported similar values from 38.89 to 50.31. Likewise, Shitikova & Povarnitsyna (2022) obtained similar results, which varied from 34.08 to 48.38, when studying six varieties of sweet potato.…”

Influencia de un complejo viral en rendimiento y contenido de clorofila de dos variedades de batata

“…Arapey la concentración de clorofila en hojas de batata sana, aunque esta determinación aún no fue realizada en hojas de batata con EA. Pepó (2018) demostró la relación entre el contenido de clorofila en hojas de batata y el rendimiento del cultivo en diferentes métodos de plantación. Los posibles efectos generados en las plantas enfermas evaluadas durante el período de fase 2 y principio de la fase final de crecimiento, se deberían a un retraso en los procesos de tuberización, además de una reducción de la actividad fotosintética.…”

Response of Crop Performance and Yield of Spring Sweet Potato (Ipomoea batatas [L.] Lam) as Affected by Mechanized Transplanting Properties

“…Ribeiro et al [13] conducted a study to evaluate the plant growth, yield, uptake, and removal of N by sweet potato plants fertilized with N and treated with paclobutrazol during two planting seasons. Pepó [14] showed that a 0.75 m row spacing was more favourable than a 1.0 m one in Hungary. China is the largest producer of sweet potatoes in the world [15].…”