Estado nutricional foliar de tres cultivares de mango fertilizados con abonos orgánicos

Abstract

The work was performed in order to determine the influence of organic fertilizer Vermicompost, Bokashi, Gallinaza to 10 and 5 t ha -1 and doses 230-0-300 (Ml) and 230 0-0 NPK g tree -1 on the foliar nutritional status of Manila Cotxtla 2 (‘MC2’), Tommy Atkins (‘TA’) and Ataulfo (‘A’) mango cultivars. Prior to flowering and before harvest, foliar concentrations of N, K, Ca, Mg, Zn, Fe, Mn and Cu were measured. The results indicate that, prior to flowering highest concentration of N was in ‘TA’, Ca in ‘A’, and Zn, Fe and Mn in ‘MC2’. Prior to harvest, ‘TA’ induced more concentration of K and Zn, ‘A’ higher in Ca, Mg and Cu, highest concentration of N in ‘MC2’. Among sources of fertilization, vermicompost 5 t ha -1, outperformed to 230-0-300 g of NPK per tree in Ca concentration (before flowering) and Cu (pre-harvest), whereas this dose exceeded all organic fertilizers and control in the concentration of Mn (pre-harvest). N values (1.22 -1.38 g 100 g- 1 ms) are in the proper range, K (0.87 to 2.02 g 100 g -1 ms) above the optimum range, Ca (0.58 to 0.73 g 100 g -1 ms) and Mg (0.07 to 0.11 g 100 g -1 ms) below the optimal range, while Zn (22.9-35.8 mg kg -1 ms), Fe (70.3-102.5 mg kg -1 ms), Mn (49.9-89.9 mg kg -1 ms) and Cu (11.4-19.7 mg kg -1 ms) are in appropriate ranges. It is concluded that the nutritional composition of foliage presented variations within each cultivar and between cultivars, the amount of nutrients removed is also influenced by cultivar and growing conditions; except for Cu and Mn, organic and mineral sources induce similar behavior in the foliar nutritional status.