CARACTERÍSTICAS MORFOGÊNICAS DO CAPIM-MARANDU SOB PASTEJO COM LOTAÇÃO ROTACIONADA, NO BREJO PARAIBANO

Abstract

The objective of the research was to analyze the morphogenesis under climatic conditions in Brachiaria brizantha pasture. Marandu grazing with rotational stocking with 26-day intervals in the region Brejo. The experiment was conducted in grazing method with rotational grazing heifers in which we used the Girolando races with initial body weight of 130 kg of body weight and the number of animals used dimensioned so that the lowering of pastures happen in period not exceeding two days . The grazing cycle was 28 days, with two days of occupation and 26 days of rest. The treatments consisted of four grazing cycles: Cycle 1 (15/09 to 01/11 2014), Cycle 2 (13/10 to 29/11 2014), Cycle 3 (10/11 - 27/12 2014) and Cycle 4 (16/12 2014 to 01/02 2015). The experimental design was a randomized block, two blocks, defined according to steep slopes of the experimental area, corresponding to the number of marked tillers, each tiller evaluated eight times in each cycle. It was determined the following morphogenetic variables: leaf appearance rate (LAR), leaves elongation rate (LER) and stem (SER), leaf senescence rate (TSeF), number of green leaves (NFV). From the results it is concluded that the marandugrass has better efficiency of use when weather conditions promotes an average LER of 2.1 cm day-1 which, consequently, will have a greater herbage mass, when well managed. However, studies are needed to better investigate the annual plant forage growth.