TITLE:
Evaluation of Soybean Cultivars of Contrasting Cycles according to the Level of Investment in Fertilization
AUTHORS:
Emerson Borghi, Eduardo de Paula Simão, Álvaro Vilela de Resende, João Carlos Cardoso Galvão, Sebastião Pedro da Silva Neto, André Ferreira Pereira
KEYWORDS:
Glycine max L. (Merrill), Growth Habit, Relative Maturity Group
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.8 No.12,
November
13,
2017
ABSTRACT: The objective of the present study was to
characterize the duration of the phenological stages, the agronomic
characteristics and grain yield in soybean cultivars with contrasting cycles
and indeterminate growth type, submitted to different fertilization investment
environments under no-tillage system in the central region of Minas Gerais. The
work was conducted under field conditions, in an experimental area of Embrapa
Maize and Sorghum, in Sete Lagoas, MG, in the harvest of 2015/2016. Ten soybean
cultivars with different relative maturity groups (RMG) were studied,
representing almost all RMG materials currently sown in Minas Gerais, in two
environments with different levels of fertilizer investment. The variables were
submitted to analysis of joint variance, in order to verify the existence of
interaction between cultivars and investment in fertilization environments.
Fertilizer investment levels influence grain yield of soybean cultivars of
contrasting cycles. The higher height of the soybean plants implies higher
lodging and lower grain yield. This situation is aggravated by the greater
investment in fertilization. The difference between the cycles of the cultivars
is in the duration of the vegetative stages, being greater in the later
cultivars.