Influência de substratos na emergência de mimosa tenuiflora (Willd.) Poiret.

Abstract

Mimosa tenuiflora (Will.)Poiret is a species found in all the Brazilian northeastern states, particularly in areas of Caatinga. The influence of temperature and substrate on the germination processis a study of fundamental importance. In this sense, the main objective of this workis to evaluate the influence of different substrates on emergence and early development of black jurema seedlings in the Cariri region. The surveys were conducted in the Laboratory of Ecology and Botany of the CDSA / UFCG, where the influence of the following substrateswere analyzed: (T1) cattle manure; (T2) sand; (T3) land at the rate of 50%; (T4) land, manure and sand; (T5) manure sand and earth and (T6) sand, manure and land in the proportions of 50% and 25%, totaling six treatments evaluating the physiological seed quality. 100 seeds were used per treatment. The emergency test was developed in a protected environment (uncontrolled conditions), where the seeds were sown in trays containing different substrates. According to the data obtained, it was found that substrates influenced in all the studied parameters. The substrate sand and earth were considered more efficient for emergency, emergency speed index, seedling length and dry mass of seedlings in uncontrolled conditions.