Lodo têxtil e água residuária da suinocultura na produ??o de mudas de Eucalyptus grandis (W, Hill ex Maiden)

摘要

The objective of this work was to evaluate the effects of textile silt, seasoning and irrigation with wastewater from swine activities on the production of Eucalyptus seedlings W, Hill ex Maiden. The treatments were constituted by three factors: chemical manuring (0; 1 and 2 grams of NPK 14-14 by tube), irrigation (water and remaining wastewater from swine) and substratum with five levels of fraction of the textile silt and commercial substratum (0; 25; 50; 75 and 100%). Four periods were evaluated during the production (germination, 21 days), (50% shadowing, 40 days), (18% shadowing, 20 days) and (full sun, 9 days) with a total of 90 days of production. The irrigation was performed by aspersion, with 12 mm day-1. The agronomic parameters evaluated were height (H), diameter (D) and the relation height/diameter (H/D) of the plants. The experimental delineation used was entirely casual on a factorial scheme with 39 repetitions per treatment. The results obtained allowed to conclude that the chemical season propitiated effect on the plants heights on the last production periods. The substratum factor presented itself on the negative form when used in 100% of the textile silt. The wastewater from swine culture presented the best results for the samples at diameter and at height. Using the parameter of the Height/Diameter relation to evaluate the samples, the remaining wastewater propitiated an anticipation of 30 days on the eucalyptus production.