Productivity and nutritional performance of red lettuce in crop succession as affected by biochar
DOI:
https://doi.org/10.18406/2316-1817v18nunico20262134Keywords:
Agronomic performance. Soil fertility. Lactuca sativa.Abstract
The use of biochar as a soil conditioner has been widely investigated due to its potential to mitigate the problem of nutrient loss in agricultural soils, offering a sustainable alternative to intensive mineral fertilization. The objective of this work was to evaluate the impact of increasing doses of biochar on the productivity and morphological characteristics of red leaf lettuce (Lactuca sativa L. cv. Scarlet) cultivated in a low-fertility Oxisol, in a succession system after arugula. The experiment was conducted in a greenhouse, in a completely randomized design (CRD), consisting of six treatments corresponding to doses of 0%, 0.8%, 1.6%, 2.4%, 3.2%, and 4.0% of biochar incorporated into the substrate, with five replications. The biochar used was obtained from the pyrolysis of sugarcane bagasse. The plants were harvested 30 days after transplanting and evaluated for morphological and biomass parameters. The results indicated that the total number of leaves, stem diameter, and total fresh mass did not show significant differences between doses. However, a significant increase in marketable fresh mass and leaf dry mass was observed in biochar doses between 1.6% and 4.0% compared to the 0% and 0.8% treatments. It is concluded that biochar, even in low-fertility soils and in crop rotation systems, improves the accumulation of marketable and dry biomass of red lettuce, although the effect on primary morphological characteristics was limited, suggesting that the material improves the retention of nutrients essential for productivity.
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