| dc.description.abstract | The production of a quality seedling is essential to obtain positive results in
field production and one of the factors that directly influences the formation of this
seedling is the substrate chosen. The objective of this work was to determine the effect
of five types of commercial substrates in the production of Deisy crisp lettuce seedlings,
from the Super-Seed® line, in order to identify which provides better development of
the aerial and root parts of lettuce and concomitantly, select the most economically
efficient for the production of seedlings. The substrates tested were: S1 = Golden Mix®
coconut fiber, composed of mesocarp fibers from coconut shells and agricultural
gypsum; S2 = substrate formed by the mixture of peat, expanded vermiculite, dolomitic
limestone, agricultural gypsum and NPK fertilizer by Carolina Soil®; S3 = of the same
composition as S2 but with a different index of water holding capacity, from Carolina
Soil®; S4 = composed of sphagnum peat and limestone, from Carolina Soil®; S5 =
Hortaliça BX substrate by Basaplant® made up of peat, limestone, vermiculite,
charcoal, phosphate rock, pine bark and coconut fiber. The design used was
randomized with 4 repetitions, where each repetition corresponds to a tray (200 cells).
After 28 days of sowing, the following variables were analyzed: number of leaves (NF),
aerial part length (CPA), root length (CR), aerial part fresh mass (MFPA), root fresh
mass (MFR), dry mass Aerial (MSPA) and Root Dry Mass (MSR). The results were
submitted to the 5% Tukey test. Substrate S3 (Carolina Soil® XVI) showed statistically
superior results for the production of seedlings in all variables, standing out in CPA,
MFPA and MSPA. S5 (Hortaliça BX) obtained statistically inferior results in the
variables CPA, CR, MSPA and MFR, proving to be inefficient for the production of
Deisy crisp lettuce seedlings. The S1 (Golden Mix® Coconut Fiber) in addition to
presenting efficient results in the NF, CR, MFPA and MFR items, proved to be the most
economically viable with a cost of R$1.20/tray. Considering the economic viability
together with the performance of the substrate, S1 is the recommended treatment to
produce Deisy curly lettuce seedlings. | |
