Article info.

ABSTRACT

Received 02 Feb 2018
Revised 23 May 2018

Accepted 30 Nov 2018

This study, conducted from May 2016 to June 2017, was aimed to investigate the effect of different fertilizer doses on yield and quality of gandaria (Bouea oppositifolia (Roxb.) Meisne). Experiments were arranged in randomized complete block design, in which the 5 investigated treatments corresponding to the five fertilizer doses, viz 1, 2, 3 and 4 kg/tree/year, and no fertilization as the control. Fertilizers doses were obtained by mixing and adjusting the proportions of mono (Urea, KCl, Diammonium phosphate -DAP) and compound (20-20-15) fertilizer. Every treatment had 10 replications, each of which equalled to one tree. The fertilizer doses were divided into three times of application, i.e. post-harvesting (50% of the investigated doses, at the N-P₂O₅-K₂O ratio of 4:3:2), 30 days after fruit set (25% of the investigated doses, at the N-P₂O₅-K₂O ratio of 1:1:1), and 60 days after fruit set (25% of the investigated doses, at the N-P₂O₅-K₂O ratio of 2:2:3). Leaf and soil samples were collected for further analysis to determine the content of some nutrient elements before and after fertilizer applications. Results of the present study showed that fertilizer application at the dose of 3-4 kg/tree/year resulted in higher yield (2.3 times higher than that of the control treatment) which was due to the increase in number of inflorescences per shoot, number of fruit per bunch and fruit set ratio. The treatment also prolonged flowering duration (79.4 days) as compared to that of the control treatment (39 days). Fruit sweetness was also improved by the application of 3-4 kg of fertilizer per tree per year.

Keywords

Fertilizer doses, flowering duration, gandaria (Bouea oppositifolia (Roxb.) Meisne.), Ma-prang, Marian plum

Cited as: Hau, T.V., Linh, N.L.K., Nguyen, N.T.T. and Hieu, T.S., 2018. Effects of fertilizer doses on yield and quality of gandaria (Bouea oppositifolia (Roxb.) Meisne.) grown in Binh Minh town, Vinh Long province, Vietnam. Can Tho University Journal of Science. 54(8): 8-16.