Journal of Food Quality

Research Article

Boron, Copper, and Zinc Affect the Productivity, Cup Quality, and Chemical Compounds in Coffee Beans

Table 7

Caffeine (Caf, %), trigonelline (Trig, %), sucrose (Suc, %), glucose (Glu, %), galactose (Gal, %), arabinose (Ara, %), and mannose (Man, %) of coffee beans harvested from plants submitted to the fertilization via solid salts injections in the trunk or foliar sprays with B, Cu, and Zn, in the crop season 2011/2012.


Treatments	Caf	Trig	Suc	Glu	Gal	Ara	Man

Boron
WB	1.01	0.83	5.14	0.18	0.10	0.03	0.14
FS	1.51	0.96	6.45	0.26	0.14	0.03	0.15
B	1.51	0.98	6.61	0.28	0.11	0.03	0.15
B + Cu	1.46	0.96	6.45	0.28	0.11	0.05+	0.17^,
B + Zn	1.50	0.99	6.81	0.35+	0.16	0.04^,	0.15
B + Cu + Zn	0.93	0.85	5.10	0.24	0.11	0.03	0.14
CV (%)	5.85	5.54	6.04	14.32	42.61	19.23	6.59
Copper
WCu	1.01	0.83	5.14	0.18	0.10	0.03	0.14
FS	1.51	0.96	6.45	0.26	0.14	0.03	0.15
Cu	1.50	0.99	6.01	0.29	0.10	0.02	0.16^,
B + Cu	1.46	0.96	6.45	0.28	0.11	0.05+	0.17^,
Cu + Zn	1.46	0.97	6.53	0.30	0.12	0.03	0.16
B + Cu + Zn	0.93	0.85	5.10	0.24	0.11	0.03	0.14
CV (%)	6.16	4.63	6.14	16.78	17.06	19.39	4.05
Zinc
WZn	1.01	0.83	5.14	0.18	0.10	0.03	0.14
FS	1.51	0.96	6.45	0.26	0.14	0.03	0.15
Zn	1.55	0.99	6.62	0.31	0.10	0.04^,	0.16
B + Zn	1.50	0.99	6.81	0.35^,	0.16	0.04^,	0.15
Cu + Zn	1.46	0.97	6.53	0.30	0.12	0.03	0.16
B + Cu + Zn	0.93	0.85	5.10	0.24	0.11	0.03	0.14
CV (%)	5.95	5.03	6.41	13.35	49.26	12.54	4.14

WB, WCu, and WZn: control treatments, without application of B, Cu, and Zn, respectively; FS: foliar spray with boric acid, copper sulphate, and zinc sulphate (0.4%); B: trunk injection of tablets containing B salts; Cu: trunk injection of tablets containing Cu salts; Zn: trunk injection of tablets containing Zn salts; B + Cu: trunk injection of tablets containing B and Cu salts; B + Zn: trunk injection of tablets containing B and Zn salts; Cu + Zn: trunk injection of tablets containing Cu and Zn salts; B + Cu + Zn: trunk injection of tablets containing B, Cu, and Zn salts; mean values are statistically different from those of the control treatment (FS) at the 10% significance level, according to Dunnett’s test; mean values are statistically different from those of the control treatment (WB-WCu-WZn) at the 10% significance level, according to Dunnett’s test.