Ảnh hưởng của phân lân đến sinh trưởng và phát triển của cây dừa ta (Cocos nucifera L.) giai đoạn kinh doanh tại huyện Bình Đại, tỉnh Bến Tre

Abstract

Coconut trees (Cocos nucifera L.)  have large stems and leaves, so they need to be supplemented with nutrients to fruiting all year round. Among the nutrients, phosphorus helps coconut trees grow roots well, increase the total number of leaves, shorten the flowering time, increase the fruit set rate and contribute to increasing productivity. This study was conducted to determine the number of fertilizations and the appropriate dosage of phosphorus fertilizer for Ta coconut trees during the 7 - 8 year business period in Binh Dai district, Ben Tre province from July 2022 to December 2024. The experiment was arranged in a sub-plot design (SPD) with 16 treatments, 3 replications, the main plot factor was the number of phosphate fertilizations and the sub-plot factor was the dosage of phosphate fertilizer. The results showed that fertilizing photphorus 3 times/year with the dose of 65 kg P₂O₅/ha/year helped coconut trees grew and developed well, achived 14.2 new leaves/tree/year, 165.4 female flowers/tree/year, fruit set rate of 46.5%, yield of 77.0 fruits/tree/year, fresh coconut meat mass of 249.2 g/fruit, copra mass of 1,273.6 kg/ha/year, oil content of 68.8% and the highest marginal profit margin (MCBR) (8.08). Therefore, the fertilizing formula of phosphate 3 times/year with a dose of 65 kg P₂O₅/ha/year should be applied in coconut cultivation in Binh Dai district, Ben Tre province to obtain high efficiency.