Agronomia (Engenharia Agronômica)

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Navegando Agronomia (Engenharia Agronômica) por Assunto "taxa de semeadura"

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    BIOMETRIA DE Crotalaria spectabilis EM FUNÇÃO DA DENSIDADE DE SEMEADURA
    (UNIFEV, 2024) Carolina Corrêa Barros
    Crotalaria spectabilis, a legume from the Fabaceae family widely used as green manure, is notable for its ability to fix high levels of nitrogen in the soil through a symbiotic association with bacteria from the Rhizobium and Bradyrhizobium genera. With a deep taproot system, this species contributes to soil decompaction, improving aeration and water infiltration. Native to the Americas, C. spectabilis is an annual spring-summer plant that is also effective in reducing nematodes in agricultural areas. The objective of this study was to evaluate the effect of seeding density and spacing on C. spectabilis in terms of biometric variables related to plant development, under different plant populations. The experimental design was a randomized block design (RBD) with 6 treatments and 4 replications, with a 6x2 factorial scheme, totaling 48 plots. The plant populations per linear meter in the treatments were: 7, 11, 21, 27, 35, and 43. Evaluations were made on plant height at 50 and 150 days after sowing, stem diameter, disease incidence, and fresh and dry biomass of the aerial parts. The results from the analysis of variance showed significance for seeding density at both evaluation times for plant height. Regarding spacing, only disease incidence showed a significant difference. No significant differences were observed for fresh and dry biomass of the aerial parts. Despite some notable results, further studies are required under different study conditions.