AVALIAÇÃO DO CRESCIMENTO E QUALIDADE DE PORTAENXERTOS E MUDAS DE CACAUEIROS

Abstract

The experiment evaluated the growth and quality of rootstocks and grafted seedlings using cacao seeds of natural pollination, of the clone TSH-1188 and controlled pollination (TSH-1188 x CCN-10). Assays were carried to compare rootstock and grafted plants. The experimental design was completely randomized with the treatments formed by seed origin, one plant per plot and 30 replications. Pre-germinated seeds were planted in plastic tubes of 800 cm3 filled with substrate and after 90 days the plants were evaluated in plant length (CP) and stem diameter (DC). After 90 days were cut and evaluated: dry biomass of roots (BSR), stems (BSC), leaves (BSF), shoot (BSA), total (BST) and Dickson Quality Index (DQI). For grafting, 30 plants were separated by type of pollination and grafting with the clone BN-34. At 30, 45, 60, 75 and 90 days after grafting were evaluated for plant length (CPT; grafting and rootstock), trunk diameter (DMG) and number of leaves in the grafted stem (NFE). The evaluation of the second assay was performed 90 days after grafting where the plants were assessed for height and diameter, and then cut off to get BST, BSR and IQD. The results showed that seedlings from seeds of controlled pollination showed greater biometric uniformity expressed by IQD, in rootstocks as well as grafting plants with the BN-34 clone