Irrigação de pastagem: Atualidade e recomendações para uso e manejo

Abstract

In the last years has been a great interest in the irrigation of pastures and the engineering issues, cost of equipment, cost of maintenance of electricity, demand for water and electricity, management irrigation and fertigation. This interest has increased the demand for information and practical advice to help clarify the important aspects as the choice of irrigation system, the potential evapotranspiration (ETo), the culture of coefficient (Kc), the evapotranspiration of the crop (ECc), the shift of water (SW), the selection of sprinklers, the flow (m3/h.ha), power (hp/ha) and the parameters for estimation of irrigation such as: field capacity (Fc), permanent wilting point (Pwp), bulk density (Bd), effective depth of the root system (Z) availability of soil water factor (f) and efficiency of application (EA). In this context the present work presents key information for deployment and conduct of safe irrigation of pasture togrther. The information available are fruit of partnerships between various institutions (Universidade Federal de Viçosa - UFV, Universidade Federal de Tocantins - UFT, University Vale do Rio Doce - UNIVALE and Centro Nacional de Pesquisa de Gado de Leite - Embrapa), in search of work and extension, as well as experience of field staff. The objectives of this publication are: disseminating scientific knowledge, with experience in the field, in irrigation of pasture and focus, with a practical and succinct way, how, how many and when and how much should fertirrigated pastures cost, stimulating new observations thus facilitating the decisions as a whole, increasing the profitability of livestock for milk and cut. © 2009 Sociedade Brasileira de Zootecnia.