Plantio cruzado na cultura da soja utilizando uma cultivar de hábito de crescimento indeterminado

Procópio, S. de O.; Balbinot, Alvadi Antônio; Debiasi, Henrique; Franchini, J. C.; Panison, Fernando

doi:10.4322/rca.2013.048

Cited by 53 publications

(85 citation statements)

References 12 publications

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“…The thousand-grain weight was not affected by the evaluated treatments, corroborating results found in the literature (Procópio et al, 2013;2014), where Bruns (2011) concluded that the row type (twin or single row) or seeding…”

Section: Bsupporting

confidence: 77%

Spatial arrangements and fertilizer doses on soybean yield and its components

Duarte

Cruz

Soares

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe 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.

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Section: Bsupporting

confidence: 77%

Spatial arrangements and fertilizer doses on soybean yield and its components

Duarte

Cruz

Soares

et al. 2016

Rev. bras. eng. agríc. ambient.

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“…On the other hand, the leaf/stem dry matter ratio in the V5 stage was lower at the highest densities in both seasons, indicating that the increase in intraspecific competition promoted lower allocation of photoassimilates in the leaves, in detriment of the stem; hence, plant density significantly alters the structure of soybean canopy. At low densities, soybean plants form higher amount of leaves in relation to the stem, to intercept the light available in the community of plants, which occurs due to the decrease in the competition between plants for water, light and nutrients (Procópio et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

“…In the seasons of 2013/14 and 2014/15, there were reductions of approximately 0.011 and 0.014 branches plant -1 for every thousand plants ha -1 of increment in plant density. According to Procópio et al (2013), the increase in branch number and size constitutes one of the main mechanisms that explain the high phenotypic plasticity of soybean in response to variations in plant density.…”

Section: Resultsmentioning

confidence: 99%

Soybean growth affected by seeding rate and mineral nitrogen

Werner

Balbinot

Ferreira

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThis study aimed to evaluate the effect of seeding rates and nitrogen (N) fertilization on plant growth in soybean cultivar with indeterminate growth habit. Two experiments were conducted in the 2013/14 and 2014/15 growing seasons, in a complete block design with split-plot scheme and six replicates. Four seeding rates (150, 300, 440 and 560 000 viable seeds ha -1 ) and two N doses (0 and 45 kg ha -1 ) were allocated in the plots and subplots, respectively. The cultivar NK7059 RR was used. The following traits were assessed: leaf, stem and total shoot dry matter, leaf/stem dry matter ratio, stem and leaf N content, SPAD index, plant height, first pod height, number of branches per plant and grain yield. Soybean growth is not affected by the interaction of plant density and mineral N fertilization. Higher seeding rates increase plant dry matter in the initial development stages and reduce leaf/ stem ratio and the number of branches per plant. The effects of N fertilization on soybean growth vary between growing seasons, but do not affect grain yield, even considering a wide range of seeding rates.Crescimento de plantas de soja influenciado pela densidade de semeadura e nitrogênio mineral R E S U M O Neste trabalho o objetivo foi avaliar o efeito de densidades de semeadura e adubação nitrogenada sobre o crescimento de plantas de soja em cultivar com tipo de crescimento indeterminado. Dois experimentos foram conduzidos nas safras 2013/14 e 2014/15 com delineamento de blocos casualizados em parcelas subdivididas e seis repetições. Nas parcelas foram alocadas quatro densidades de semeadura (150, 300, 440 e 560 mil sementes viáveis ha -1 ) e nas subparcelas dois níveis de nitrogênio (0 e 45 kg N ha -1 ). A cultivar de soja utilizada foi a NK7059 RR. Foram avaliados a massa seca de caules, folhas e total, relação folha/caule, o teor de nitrogênio nas folhas e no caule, índice SPAD, altura de plantas e da inserção da primeira vagem, número de ramos por planta e produtividade de grãos. O crescimento de plantas de soja não é afetado pela interação da densidade de semeadura e a adubação nitrogenada mineral. O aumento da densidade de semeadura incrementa a massa seca de plantas nas fases iniciais de desenvolvimento e reduz a relação folha/caule e o número de ramos por planta. O efeito da adubação nitrogenada no crescimento das plantas é variável entre as safras mas não aumenta a produtividade mesmo considerando ampla variação de densidade de semeadura.

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“…Plant density affects intraspecific competition for water, light and nutrients and may alter plant architecture, the use of environmental resources and phytosanitary management (Procópio et al 2013). Thus, density adjustment allows yield increments, with rationalization of the cost of seeds, and does not involve the use of new technology .…”

Section: Introductionmentioning

confidence: 99%