Potencialidades de Trichoderma spp como condicionador de substrato na produção de mudas Annona squamosa L..

Abstract

The fruit of the earl (Annona squamosa L.), known regionally by several names like ata, pineapple and anona, has aroused interest of producers of several regions since the decade of eighty. The culture is basically propagated by seeds and the However, the production of sexually transmitted seedlings is a result of seed dormancy, which, for some unknown reason, inhibits germination after drying. The influence of microorganisms on the development of the use of plant growth promoters to increase agricultural production will probably be one of the most important tactics for the present in the world. The present work had as objective to evaluate the influence of Trichoderma spp. As soil conditioner on different substrate s in the production of pineapple saplings. The study was carried out in the facilities of the Federal University of Campina Grande, in the Center of Sciences and Technology Agroalimentaria (CCTA), campus Pombal - PB, where the completely randomized design was used in factorial 13 × 3 , totaling 39 treatments and four replicates, consisting of: T1- bovine manure 25% + Basaplant 75%, T2 - bovine manure 50% + Basaplant 50%, T3 - bovine manure 75% + Basaplant 25%, T4 - Humus 75% + Basaplant 25%, T5 - Humus 50% + Basaplant 50%, T6 - Humus 25% + Basaplant 75%, T7 - Only 75% + Basaplant 25%, T8 - Only 50% + Basaplant 50%, T9 - Only 25% The treatment was composed of 12 seedlings, 4 for control, 4 using Trichoderma harzianum and 10 for the control group. 4 Trichoderma longibrachiatum. The evaluations were carried out at 30, 60 and 90 days, when the height of the seedlings, stem diameter, number of leaves, fresh and dry shoot mass, stem and root, plant length, root length and Dickson quality index. Under the conditions in which the present work was developed, it is concluded that the use of Trichoderma harzianum and T. longibrachiatum as soil conditioners in association with the substrate containing bovine manure and Basaplant provided a better quality of pineapple sapling. The Trichoderma isolates tested were promising in the use as growth promoters and development of pineapple seedlings.