Crescimento de genótipos de citros sob salinidade.

Abstract

In order of evaluate the growth of citrus genotypes (varieties and hybrid) under salinity, in the formation phase, an experiment was accomplished in randomized blocks, with three repetitions, in greenhouse. Five levels of irrigation water salinity were studied, combined to twelve citrus genotypes rootstochs in two varieties cups. Nine plants compos the experimental unit, in pots of polyethylene of 288 mL by five months after the sow, when they were transplanted for pots of plastic, using commercial substratum. The saline waters applications initiated at 60 days after the to sow, and extending until the dumb ones be capable to the transplant in field. Every 30 days from the beginning of the treatments to the enxertia, it was obtained the plant height, the stem diameter and leaf number of the portaenxertos; after the graft, the graft leaf number, length of the graft and graft diameter were obtained. The data were submitted the variance analysis by the Test 'F', and performing for the quantitative factors the regression analysis and for the qualitative ones averages tests (p<0,05). Ending that: The salinity reduces the citrus growth; the TSKFL X CTC25 - 010 and Citrangeiro Troyer have larger growth before the enxertia; The rangpour lemon with Tahiti combination is the most indicated.