Manejo da Adubação do Capim-Piatã (Urochloa Brizantha CV. Piatã) Após a Desfolhação.

Abstract

The present work was elaborated with the intention of evaluating the best management of fertilization after a defoliation on morphological, agronomic and structural characteristics of the Piatã grass (Urochloa brizantha cv Piatã). (0, 3, 7, 14, and 21 days) with four replicates per five-year period with four replicates per year. A leaf elongation taxon (TALF), stem elongation rate (TALC) did not have significant significance (P> 0.05) for the management of fertilization after a defoliation. These variables are directly linked to the plant set and to the phyllochrome, which did not have statistical statistics (P> 0.05). A leaf senescence rate (TSF) was significant (P <0.05), showing the treatment from 21 days to the greatest, with a value of 9.6 mm day-1. The SPAD index was relevant in this experiment, showing that the plant was photosynthetically, finding values of 39 units, respectively for treatments 7 and 21 days, respectively. Another variable, which had a significant response (P <0.05) for the rest period, which was 39 days for treatments 7; 14 and 2, showing a direct relationship with a canopy structure of the plots, and showing a Time demand for the plant to be recovered. The management of fertilization is fundamental to show that there are many long for application, directly influence the physiological and photosynthetic structure of the plant.