Abstract:

Abstract The use of agro-industrial residues as a substrate component can be a viable alternative destination, however, studies are still needed regarding the appropriate proportions, ensuring the morphophysiological quality of the seedlings produced in the nursery. Thus, the objective of the research was to evaluate the use of crushed peach stone and brown peat as substrates in the production of Myrocarpus frondosus seedlings in a nursery. For the production of seedlings, different proportions (volume:volume) of ground peach pits (C) and brown peat (T) were used (S1 - C100%; S2 - C80%:T20%; S3 - C60%:T40% ; S4 - C40%:T60%; S5 - C20%:T80%; and S6 - T100%). The design used was completely randomized, with six treatments and four replications, in the 24 sampling units, the 12 central seedlings were evaluated, totaling 48 seedlings per treatment. The 12 central seedlings were evaluated, totaling 48 seedlings per treatment. The morphological attributes evaluated were: height (H), stem diameter (SD), H/SD ratio, shoot dry matter (SDM), root dry matter (RDM), total dry matter (TDM), leaf area (LA), root volume (RV) and Dickson's Quality Index (DQI). The ground peach pits as substrate negatively influenced the growth seedlings. The treatment using 100% of peat showed superiority for the development of Myrocarpus frondosus seedlings, being that even under reduced proportions of peach stone (20%), the plants show a significant decrease (≥16%) of the attributes used as indicators.

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