. 2024 Feb 2;10(3):e25541. doi: 10.1016/j.heliyon.2024.e25541

Table 7.

Influences of specific-site nutrient management on fruit quality of pineapple in acid sulfate soil in Vi Thanh city and Long My district.

Location	Treatment	Water content	Degree Brix	pH	Total acid	Vitamin C	Fruit color
Location	Treatment	mL	%	pH	mg L⁻¹	mg 100 g⁻¹	L*	a*	b*
VT	No fertilizer	180.0^d	5.86^d	3.52	9.36	20.5^d	184.9^b	38.8^b	99.8
	NPKCaMg	644.8^a	7.58^a	3.66	10.7	50.2^a	213.9^a	53.5^a	103.0
	PKCaMg	288.2^c	7.03^ab	3.64	10.2	32.1^b	190.3^b	46.1^a	101.4
	NKCaMg	413.7^b	7.10^ab	3.65	10.1	34.8^b	194.5^b	47.1^a	101.1
	NPCaMg	425.6^b	6.25^cd	3.63	9.68	23.2^cd	193.4^b	47.0^a	106.6
	NPKMg	451.6^b	7.47^a	3.61	10.1	35.5^b	195.4^b	47.7^a	100.2
	NPKCa	404.1^b	7.45^a	3.58	10.6	31.7^b	194.5^b	49.5^a	99.5
	FFP	347.5^bc	6.67^bc	3.65	10.1	29.9^bc	191.6^b	48.7^a	100.4
LM	No fertilizer	318.5^d	5.63^c	3.33	10.6	28.1^c	208.9^b	47.4^d	104.3
	NPKCaMg	614.9^a	7.84^a	3.39	13.3	53.4^a	262.3^a	64.0^a	110.2
	PKCaMg	406.0^c	7.05^b	3.38	11.7	48.4^ab	215.3^b	48.8^cd	106.3
	NKCaMg	555.6^b	7.19^ab	3.34	12.0	46.9^ab	225.3^b	54.8^b	107.7
	NPCaMg	554.3^b	6.08^c	3.33	11.7	28.9^c	210.2^b	53.1^bc	109.8
	NPKMg	531.7^b	7.80^a	3.30	11.5	48.8^ab	218.8^b	53.3^bc	107.1
	NPKCa	542.6^b	7.12^b	3.37	11.8	44.3^ab	221.4^b	56.3^b	105.8
	FFP	495.6^b	7.68^ab	3.29	11.2	40.5^b	237.2^ab	54.8^b	108.7
VT	F	*	*	ns	ns	*	*	*	ns
VT	CV (%)	21.4	7.52	2.62	20.8	20.8	6.98	12.8	10.3
LM	F	*	*	ns	ns	*	*	*	ns
LM	CV (%)	9.70	7.38	7.57	13.6	17.8	12.0	8.16	10.5

Note: VT: Vi Thanh city. LM: Long My district. In the same column, numbers followed by the same letters were different insignificantly from each other via Duncan post-hoc test.*: different at 5 % significance. ns: not significant. NPKCaMg: full fertilization; PKCaMg: fertilization without nitrogen; NKCaMg: fertilization without phosphorous; NPCaMg: fertilization without potassium; NPKMg: fertilization without calcium; NPKCa: fertilization without magnesium; FFP: farmers' fertilizing practice.