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

Table 3

Coffee cherry production of coffee plants submitted to the fertilization via solid salts injections in the trunk and foliar sprays with B, Cu, and Zn.

Treatments	Production
	2010/2011	2011/2012
Boron
WB	3.47	4.55
FS	3.57	5.47
B	3.83	4.30
B + Cu	3.74	6.15^,
B + Zn	3.47	5.59^,
B + Cu + Zn	3.45	3.93
Means	3.59	5.00
CV (%)	22.88	26.66
Copper
WCu	3.47	4.55
FS	3.57	5.47
Cu	3.99	5.56
B + Cu	3.74	6.15^,
Cu + Zn	3.42	5.15
B + Cu + Zn	3.45	3.93
Means	3.61	5.13
CV (%)	22.85	20.38
Zinc
WZn	3.47	4.55
FS	3.57	5.47
Zn	3.83	5.24
B + Zn	3.47	5.59
Cu + Zn	3.42	5.15
B + Cu + Zn	3.45	3.93
Means	3.54	4.99
CV (%)	28.56	27.03

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.