Abstract
ABSTRACT The aim with this study was to evaluate the effects of single- and twin-row spatial arrangements associated with different doses of fertilization on soybean yield and its components. The experiment was carried out at Federal University of Goiás, Campus of Jataí, in a split-plot randomized block design with 10 treatments and four replicates. Each plot corresponded to a dose of P and K fertilization (0, 50, 100, 200 and 400% of the recommended dose) and the subplots to two types of spatial arrangements: single and twin rows. The yield components evaluated were plant final population, number of pods and seeds per plant, number of seeds per pod, weight of a thousand grains and yield. The increase in fertilization dose, even at doses two and four times higher than recommendation, results in increased soybean grain yield for both studied arrangements. The single-row arrangement provides greater soybean yield, regardless of the dose of fertilization, although most of the production components were not negatively affected, except the population.
Highlights
Soybean (Glycine max (L.) Merrill) has been widely cultivated in Brazil and in the world due to its food and economic importance, which drives several agro-industrial complexes. Nowadays this crop has achieved yield increase that is a result of studies that aimed to identify the factors that contribute to crop yield maximization, linking the interactions between yield level, the cultivar, environmental conditions and management practices
It is possible to observe in the literature different soybean responses to fertilization, where, for the most part, the doses established in the recommendation manuals do not guarantee high yields (Araújo et al, 2005; Foloni & Rosolem, 2008; Bernardi et al, 2009; Guareschi et al, 2011)
The aim with this study was to evaluate the effects of singleand twin-row spatial arrangements associated with different doses of fertilization on soybean yield and its components
Summary
Soybean (Glycine max (L.) Merrill) has been widely cultivated in Brazil and in the world due to its food and economic importance, which drives several agro-industrial complexes Nowadays this crop has achieved yield increase that is a result of studies that aimed to identify the factors that contribute to crop yield maximization, linking the interactions between yield level, the cultivar, environmental conditions and management practices. A system worth mentioning is sowing in twin rows, where there may be better penetration of light and agrochemicals in the canopy, enhancing the photosynthetic rate and the permanency of the lower third of the plant leaves, which can maximize yield (Bruns, 2011) Fertilization management is another factor that significantly contributes to higher yields. The aim with this study was to evaluate the effects of singleand twin-row spatial arrangements associated with different doses of fertilization on soybean yield and its components
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