The following information was submitted:
Transactions: WSEAS TRANSACTIONS ON ENVIRONMENT AND DEVELOPMENT
Transactions ID Number: 42-305
Full Name: José Beltrão
Position: Professor
Age: ON
Sex: Male
Address: Universidade do Algarve, Faculdade de Ciências e Tecnologia, Edificio 8, Campus de Gambelas, 8005-139 FARO
Country: PORTUGAL
Tel: 00351289800900
Tel prefix:
Fax: 00351289818419
E-mail address: jbeltrao@ualg.pt
Other E-mails: cguerre@ualg.pt
Title of the Paper: Carob residues as a substrate and a soil organic amendment
Authors as they appear in the Paper: ANA CABECINHA; CARLOS GUERRERO; JOSÉ BELTRÃO; JOÃO BRITO
Email addresses of all the authors: cguerre@ualg.pt; jbeltrao@ualg.pt; jbrito@ualg.pt
Number of paper pages: 10
Abstract: The objective of this study was to evaluate the agricultural use of carob (Ceratonia siliqua, L.) seed residues as a substrate and/or a soil organic amendment. The tomato (Lycopersicum esculentum L., cv. Realeza) was the studied crop. Plants were grown in pot filled with carob seed residues mixed with a sandy topsoil at the following rates (t/ha): 0; 10; 20; 30; 40; 50; 60; and 100 % of carob seeds. During the experiment, plant height, number of leaves, inflorescences, ripe fruits and the transversal and longitudinal diameters were measured weekly. Sandy soil, carob residues and soil and their mixtures were chemically analysed, in order to determine the following parameters: organic matter content, pH, electrical conductivity, N, P, K, Ca, Mg, Fe, Mn, Zn, Cu, Cd, Cr, Ni and Pb contents. Cu, Cd, Ni and Pb concentrations were determined in the carob residues only just before mixing with the sandy soil. Carob seed residues alone (used as an organic substrate) treatmen!
t promoted the highest root density, plant development, as number of leaves and fruits, and the highest crop yield. Plants of the 100% carob seed residues treatment also showed the highest density of roots. The obtained results suggest that carob seed residues may be used successfully as an organic amendment and/or as a horticultural substrate, mainly to root crops.
Keywords: crop yield, Lycopersicum esculentum L. cv. Realeza, organic substrate, soil-substrate mixtures, tomato nutrient content
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