Maneio da batata-doce para produção de forragem e raízes de reserva

Abstract

Three sweetpotato varieties, obtained in the iniaiita/sarrnnet multiplication field, were tested in the same field in umbeluzi, in order to determine the yield, the quality of roots and vines in response to the cuts. The design used was a split-plot arranged in randomized complete blocks with four replications. The three cutting frequencies carried out in 10 days, 20 days and one as a control were allocated to the main stand, and the three varieties chingova, cordner and jonathan were allocated to the stand, in a trial that lasted approximately 150 days. Among the variables evaluated are: shoot and root production, shoot and root dry matter percentage (m s), and shoot nitrogen content. With regard to the yield of storage roots, the cuts had a large influence, the jonathan variety being the best in treatment without cutting application (control). In terms of dry matter production in the roots, the chingova variety showed superiority in relation to the others and it was found a decline in ms production in treatments with cuts when compared to the control treatment. In relation to crude protein (bp) in the branches, there was no significant interaction between varieties and cutting intervals, and it was found that the tender leaves have higher protein content and that the protein content decreases with the physiological age of the leaves. As for shoot yield, the cordner variety proved to be the most productive and allowed for frequent cuts, contrary to jonathan, which produces better in the control treatment