Avaliação química-bromatológica e produtiva do capim Tifton 85 (Cynodon SSP.) irrigado com esgoto doméstico tratado

Abstract

The present research had the objective of evalua-ting the use of domestic treated sewer in the irriga-tion of the grass Tifton 85 (Cynodon spp.) grown in a soil area located at the Aquiraz county (CE, State). The experimental design consisted of randomized blocks, with five treatments (T1, water of well 75% ECA + fertilization; T2, treated sewer + 150 Kg Na ha-1 year -1 ; T3, treated sewer + 300 Kg Na ha-1 year-1;T4, treated sewer + 600 Kg Na ha-1 year-1; T5, treated sewer + 1200 kg Na ha-1 year-1) and four replicates. Leaf samples were collected four times along the period of the experiment by cutting the plants always when they reached a height of 0,45m. The following analyses were per for med: chemical-bramatological and chemical analyses of the plant leaves; water and soil (0-20 cm and 20-40 cm layers) chemical analyses were also carried out (from March to August, 2008). The results obtained from the chemical-bramatological analyses (Tifton 85 leaf samples) and as related to nitrogen, crude protein and phosphor us leaf contents were considered adequates for the 132, 265, 530 and 1061mm year-1 applied blade levels