Comparative assessment of fertilization of marigold (Tagetes erecta L.) development, yield, quality and residual soil chemical properties
A field trial was conducted on the marigold cultivar LSQUOMoon SapphireRSQUO at the Naresuan University experimental farms in Phitsanulok, Thailand. The aim of this study is to test the hypothesis that mixed compound fertilizer can better improve marigold development, yield and induce an increase in total carotenoid content in the inflorescences. The experiment design is a randomized complete block design (RCBD) with four factors and four replications. The factors were: T1) control (no fertilization); T2) N21P21K21+N8P24K24 (1:1) = 625 kg ha‑1; T3) N21P21K21+N8P24K24 (1:1) + chemical and granular organic fertilizer with hormone mixed formula-HO (312.5 kg ha‑1) = 625 kg ha‑1; and T4) HO (625 kg ha‑1). Plant spacing was 0.5×0.5 m in a plot size of 4.0×2.5 m. The study demonstrated the significant effect fertilization can have on marigold yield, quality and residual soil chemical properties. The number of flowers ha‑1 (2,254,666.67), flower shelf-life after 72 h (8.35 g plant‑1) and flower carotenoid (102.68 mg 100 g‑1 FW) were greater for the HO treatment, but was not significantly different from the treatment N21P21K21+N8P24K24 (1:1) + HO. Upon completion of the study the soil chemical properties such as N, P, K, Fe, Cu, Zn, Mn, B, pH, CE and organic matter contents were improved by the HO and N21P21K21+N8P24K24 (1:1) + HO treatments. The results showed the HO fertilizer, and N21P21K21+N8P24K24 (1:1) + HO treatments produced the highest marigold yield and added significant value to the raw flower by increasing their total carotenoid content.
Sonklien, C., Intanon, P., Terapongtanakorn, S. and Deewatthanawong, R. (2021). Comparative assessment of fertilization of marigold (Tagetes erecta L.) development, yield, quality and residual soil chemical properties. Acta Hortic. 1312, 401-408
carotenoid, fertilizers, marigold, yield, shelf-life, soil properties