FRANCISCO, Paulo Roberto Megna.; SILVA, Viviane Farias.; SANTOS, Djail.; RIBEIRO, George do Nascimento.; AYRES, Gypson Dutra Junqueira.
Résumé:
The lack of water can, in mild cases, affect the growth of the plant and reduce its productivity and, in extreme cases, death. The present research aims to investigate the production of phytomass and water content in plants of forest species subjected to water stress. The methodology applied for seedling production was the proportion of 2:1 (soil: goat manure), 5 different irrigation levels, with analyzes at 60 and 120 days after sowing. Sabiá seeds (Mimosa caesalpiniifolia Benth) were used, the water used in irrigation from CAGEPA. From the results, it can be seen that at 60 days they were statistically significant at 5% for the variable fresh shoot biomass and, at 120 days, at 1% for fresh and dry shoot, root and total phytomass. With better results applying water depths at 60 and 80% and decreases when applying 100%, thus, from 60 to 120 days, it is recommended to apply 80% of the plant's water requirement, a period that requires greater amounts of water for the increase of photoassimilates from the aerial part of the plant. Concluding that the reduction of water availability directly affects the amount of phytomass produced by forest species.
