COEFFICIENT OF CULTURE (Kc) OF Urochloa brizantha cv. MARANDU IN TWO PRODUCTIVE SYSTEM

D. P. SOUZA, A. C. SANCHES, R. G. MAFFEI, F. C. MENDONÇA
2017 Anais do IV Inovagri International Meeting - 2017   unpublished
The use of crop coefficient (Kc) take management irrigation efficient, its represent the water consumption of the plants. However, as for fodder plants, this knowledge is not well-founded. Because of this, this study aims to determine the water consumption of Urochloa brizantha cv. Marandu in single crop and black oats and Italian ryegrass in overseeded cultivation, by means of weighing lysimeters. The experiment was carried out at the ESALQ/USP, both lysimeters were used throughout the
more » ... oughout the experimental period (February to October 2016), one with exclusive culture and the other with overestimation in the month of May. The crop evapotranspiration (ETc) was calculated with the means of the weighting lysimeter variation and the reference evapotranspiration (ETo) determined by Penman-Monteith with data by meteorological stations present at the ESALQ/USP. Were determined Kc values every four days. There was differences between productive system. Water productivity in the fall/winter period was higher in consortium. Kc values varied between 0,30 and 1,24 (single crop in the summer), between 0,24 and 1,14 (single crop in winter) and between 0,33 and 1 (consortium). ESTIMATIVA DO COEFICIENTE DE CULTURA (Kc) DE Urochloa brizantha cv. MARANDU EM DOIS SISTEMAS PRODUTIVOS RESUMO: A utilização do coeficiente de cultura (Kc) torna o manejo da irrigação facilitado e eficiente, por o mesmo representar o consumo de água de uma determinada espécie vegetal cultivável. No caso de plantas forrageiras, esse conhecimento ainda não está bem fundamentado. Por isso, objetivou-se determinar o consumo de água de Urochloa brizantha cv. Marandu em cultivo solteiro e consorciado com aveia preta e azevém, por meio de dois 1 Engenheira Agrônoma, Doutoranda em Engenharia de Sistemas Agrícolas (ESALQ/USP), Av. Pádua dias, 11 (LEB), CEP:13418-900, Piracicaba/SP, Fone (19) 34478578 ramal 29, e-mail: dpdsouza@usp.br. 2 Doutorando em Engenharia de Sistemas Agrícolas, ESALQ/USP, Piracicaba/SP, arthur_caniato@usp.br.
doi:10.7127/iv-inovagri-meeting-2017-res0590105 fatcat:otdlz235vbaszcpwu62y4c56ae