ABSTRACT
The objective of this study was to evaluate the residual concentration from the application of levels of phosphorus contained in an organomineral fertilizer (OMF) in two soils cultivated with cabbage and lettuce in succession. In randomized blocks, five doses of OMF were used as a source of P in Oxisol (0, 50, 100, 200, and 300% of the P dose was recommended for cabbage crop using OMF), plus an additional treatment (100% mineral). The doses applied to the Entisol were as follows: 0, 50, 100, 200, and 300% of the recommended P dose with OMF for cabbage crop, plus an additional treatment (100% mineral), with four repetitions. The production of fresh matter (FM) and dry matter (DM), the nutritional status of the cabbage and lettuce, and the residual effect of nutrients in the soil were also evaluated. The P concentration in the soil increased (p ≤ 0.05) with higher doses of OMF in the Oxisol in the two cycles evaluated. However, this occurred only in the first cycle in the Entisol. Using the 50% dose of OMF in the cabbage in both soils provided FM and DM production values that were at least 11% higher than those attained with mineral fertilizer.
Key words:
Brassica oleracea var. capitata; Lactuca sativa L.; organic matter
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ns and ** - Not significant and significant at p ≤ 0.01 by Tukey’s test, respectively
ns, *, and ** - Not significant, significant at p ≤ 0.05, and significant at p ≤ 0.01 by F test
ns, *, and ** - Not significant, significant at p ≤ 0.05, and significant at p ≤ 0.01 by F test
ns, *, and ** - Not significant, significant at p ≤ 0.05, and significant at p ≤ 0.01 by F test
ns, * and ** - Not significant, significant at p ≤ 0.05, and significant at p ≤ 0.01 by F test