Abstract:

In order to understand the effect of fertilizer application amount on yield and quality of ‘Tainong’ mangoes, principal component analysis and principal component score were introduced to evaluate the fertilizer effect of different fertilizer application amounts, so as to guide the scientific application of fertilizer in ‘Tainong’ mangoes production. Three fertilizer application levels were set for treatment, including N 322.92 g/plant+ P₂O₅ 96.88 g/plant+ K₂O 322.93 g/plant+ organic fertilizer 7.5 kg/plant (A), N 248.40 g/plant+ P₂O₅ 74.52 g/plant+ K₂O 248.40 g/plant+ organic fertilizer 7.5 kg/plant (B), N 173.88 g/plant+ P₂O₅ 57.38 g/plant+ K₂O 177.29 g/plant+ organic fertilizer 7.5 kg/plant (C). The effects of different fertilizer application rates on yield, quality and economic benefits of mango were studied. The test results showed that there were significant differences in vertical stem, transverse stem and fruit thickness among different treatments, but no significant differences in fruit type index. The external quality of fruit treated with A and C was better than that treated with B. There was no significant difference in yield among different treatments, but significant difference in fertilizer output rate among different treatments, and C treatment had the highest fertilizer output rate (4.33 g/g). The economic benefit of treatment A and C was higher than that of treatment B, among which the economic benefit of treatment C was the highest (103,230.61 yuan/hm²), and the economic benefit of treatment A and C was increased by 143.19 and 8169.15 yuan/hm², respectively, compared with treatment B. The comprehensive scores of fruit type index, intrinsic quality and yield index were A>B>C. Through reasonable adjustment of fertilizer application amount, fertilizer consumption can be reduced to achieve stable yield and improve economic benefit.

Key words: fertilization amount, ‘Tainong’ mango, yield, quality, economic benefit, principal component analysis