Determination of the crop coefficient (KC) for tropical forages on single cropping and on oversown with temperate forage crops

• Grant number: 12/23002-6
• Support Opportunities: Regular Research Grants
• Start date: November 01, 2014
• End date: October 31, 2016
• Field of knowledge: Agronomical Sciences - Agronomy - Agricultural Meteorology
• Principal Investigator: Fernando Campos Mendonca
• Grantee: Fernando Campos Mendonca
• Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
• Associated researchers: José Ricardo Macedo Pezzopane ; Patricia Angélica Alves Marques ; Patricia Menezes Santos

Abstract

This research project is proposed in order to determine the crop evapotranspiration (ETc) of some tropical forage crops, on single cropping and oversown with temperate forage crops, and its relation with the reference evapotranspiration (ETo), aiming to contribute for the knowledge about the water consumption of these crops, and to help on the correct irrigation management. It will be studied the water consumption of Panicum maximum cv. Mombaça, Cynodon sp. cv. Tifton 85, and the water consumption of these forage crops when oversown with oats (Avena strigosa Scherb) and ryegrass (Lolium multiflorum Lam.). The crop evapotranspiration (ETc) will be obtained with the use of weighing lysimeters. The reference evapotranspiration (ETo) will be obtained with the Penman-Monteith method, with measurements of climate parameters made by an automatic meteorological station placed near the experimental area. The values obtained will be used to estimate the relation between ETc and ETo, aiming to determine the crop coefficients (Kc) of the forage crops on the studied cropping systems. The crop coefficient (Kc) will be related to the plant development, mainly expressed by the leaf area index (IAF), along the regrowth cycles, according to the number of days after cutting (forage resting period). Furthermore, it will be studied the relation between the crop coefficient and the parameters that consider the available environmental energy, as degree-days (GD) and phototermal units (UF). (AU)

Scientific publications

(5)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

SANCHES, ARTHUR CARNIATO; DE SOUZA, DEBORA PANTOJO; FERREIRA DE JESUS, FERNANDA LAMEDE; MENDONCA, FERNANDO CAMPOS; GOMES, EDER PEREIRA. Crop coefficients of tropical forage crops, single cropped and overseeded with black oat and ryegrass. Scientia Agricola, v. 76, n. 6, p. 448-458, NOV-DEC 2019. (12/23002-6)

SANCHES, ARTHUR C.; DE SOUZA, DEBORA P.; DE JESUS, FERNANDA L. F.; MENDONCA, FERNANDO C.; GOMES, EDER P.. VEGETATIVE DEVELOPMENT AND GROWING DEGREE-DAYS OF TROPICAL AND WINTER FORAGES. Engenharia Agrícola, v. 39, n. 2, p. 191-197, MAR-APR 2019. (12/23002-6)

SANCHES, ARTHUR C.; DE SOUZA, DEBORA P.; MENDONCA, FERNANDO C.; MAFFEI, RODOLFO G.. Construction and calibration of weighing lysimeters with an automated drainage system. Revista Brasileira de Engenharia Agrícola e Ambiental, v. 21, n. 7, p. 505-509, JUL 2017. (12/23002-6)

SANCHES, ARTHUR CARNIATO; DE SOUZA, DEBORA PANTOJO; FERREIRA DE JESUS, FERNANDA LAMEDE; MENDONCA, FERNANDO CAMPOS; GOMES, EDER PEREIRA; MACEDO PEZZOPANE, JOSE RICARDO. Comparison of water consumption estimates for tropical and winter forages by FDR probes and weighing lysimeters. SEMINA-CIENCIAS AGRARIAS, v. 40, n. 3, p. 1115-1125, MAY-JUN 2019. (12/23002-6)

DE SOUZA, DEBORA PANTOJO; SANCHES, ARTHUR CARNIATO; MENDONCA, FERNANDO CAMPOS; MACEDO PEZZOPANE, JOSE RICARDO; AMORIM, DANIELLE MORAIS; FERREIRA DE JESUS, FERNANDA LAMEDE. Crop coefficient estimated by degree-days for `Marandu' palisadegrass and mixed forage. REVISTA DE LA FACULTAD DE CIENCIAS AGRARIAS, v. 53, n. 2, p. 71-81, DEC 2021. (12/23002-6)