Nutrição com boro na soja em função da disponibilidade de água no solo

Silva, Renan César Dias da; Silva, Geovani Soares da; Silva, Camila dos Santos; Santos, Caroline Teodoro dos; Pelá, Adilson

doi:10.5380/rsa.v18i4.52762

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…According to Silva et al (2017), studying B application and soil water retention capacity, found that the dose of 1 mg dm -3 of B resulted in an additional production of 7 grams plant -1 at a soil water retention capacity of 70%.…”

Section: Contentsmentioning

confidence: 99%

Doses, methods and times of application of boron in soybean under field conditions

Silva¹,

Silva²,

Pelá³

et al. 2020

Biosci. J.

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The boron (B) fertilization in soybean is important to ensure great yields. Boron correction must be applied in deficient soils repairing losses, exports and leaching. The objective of this study was to evaluate the effects of doses, methods and times of application of B in soybean B content and yield. The field experiments were conducted during the 2015/16 and 2016/17 cropping seasons and set as a randomized block design with nine treatments (0, 0.5, 1, 1.5, 2 kg ha-1 of B, 0.5 kg ha-1 of B mixed with NPK (02-28-18) in furrow during sowing, foliar application with 0.3 kg ha-1 of B in V4 soybean stage, foliar application with 0.3 kg ha-1 of B in R1 soybean stage, and foliar application of 0.15 kg ha-1 in V4 plus 0.15 kg ha-1 of B in R1 soybean stage) and four replications. Boric acid was the B source and the variables analyzed were: B leaf content, B exported in seeds, number of pods per plant, number of seeds per pod, weight of 100 seeds (g) and productivity (kg ha-1). The levels of B in leaf were between 30.1 and 43.8 mg kg-1 and between 65.0 and 92.6 mg kg-1 in the 2015/16 and 2016/17 growing season, respectively. Exports of B in seeds were estimated between 166 and 248 g ha-1 and between 208.9 to 260.8 g ha-1 in the 2015/16 and 2016/17 growing season, respectively. Great productivity (3,820 kg ha-1) was observed in the 2016/17 growing season, with an estimated dose of 0.95 kg ha-1 of B.

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Section: Contentsmentioning

confidence: 99%

Doses, methods and times of application of boron in soybean under field conditions

Silva¹,

Silva²,

Pelá³

et al. 2020

Biosci. J.

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“…Therefore, the appropriate management of micronutrients is a decisive factor to ensure yield gains in soybean crops. Boron (B) is the most limiting micronutrient in soybean yield under the soil conditions in Brazil (Tomicioli et al, 2021) because B deficiency can reduce soybean yield by up to 40% (Silva et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Efficiency of critical level and compositional nutrient diagnosis methods to evaluate boron nutritional status in soybean

Traspadini

Wadt²,

Mello-Prado

et al. 2022

Chil. j. agric. res.

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The efficiency of the boron (B) nutritional status in soybean (Glycine max (L.) Merr.) was evaluated by degree of agreement (DA) indicators using different diagnostic methods and by prescient diagnostic analysis (PDA). The objective of this study was to evaluate the efficiency of two interpretation methods of B nutritional status in soybean, that is, compositional nutrient diagnosis (CND) and critical level (CL). An experimental trial was conducted using a randomized block design with five replicates, which evaluated foliar B application rates of 0, 300, 600, 1200, and 1800 g ha -1 . Another study consisted of monitoring 140 commercial farms. We sampled leaves to determine nutrient contents and estimate yield in both studies. All samples were diagnosed by CND and CL methods. A reference value in the literature was obtained by the reduced normal distribution and CL methods by field calibration in the experimental trial. All the methods showed a high DA between diagnoses; the efficiency ratio and accuracy for true deficiency were both low, except for the CL method by field calibration, which exhibited an increase in positive net yield. The DA was ineffective to validate the efficiency of nutritional diagnoses; methods with a higher DA showed negative values for the net increase in production (-46 to -53 kg ha -1 ). The CL method by field calibration showed greater efficiency in assessing the nutritional status of B in foliar fertilized soybean because the net increase in production was 197 kg ha -1 .

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“…De acordo com Silva et al (2017), o B se encontra na solução do solo como ácido bórico, o qual chega até as raízes através de fluxo de massa. A sua absorção ocorre de forma passiva em função do gradiente de concentração.…”

Section: Introductionunclassified

Manejo De Aplicação De Boro No Cultivo Da Soja

Ecco

Backes

Reuter

2022

RCR

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Com objetivo de avaliar os efeitos do manejo de aplicação de boro para a produção da soja, os tratamentos foram constituídos: 1) testemunha (sem a aplicação de B); 2) dessecação (aplicação de B em pré-semeadura, junto a calda de dessecação); 3) foliar em estádio R1; 4) estádio R4 e, 5) estádio R6 conforme escala de Fehr e Caviness (1977) contendo 5 repetições em delineamento em blocos causalizados. Foi conduzido na localidade de Alto Santa Fé, distrito de Nova Santa Rosa -PR, sob Latossolo Vermelho distroférrico típico. Foram avaliados: altura e diâmetro de planta, número de vagens por planta, número de racemos, massa de mil grãos e produtividade, onde as médias foram comparadas pelo teste de tukey após teste F. Apenas as variáveis altura e diâmetro de colmo foram influenciadas significativamente pelos tratamentos, onde a aplicação realizada em dessecação proporcionou o melhor aproveitamento do nutriente B, devido as quantidades de B presente na área experimental serem baixas, onde que este elemento atua no alongamento e divisão celular e crescimento da planta. As variáveis produtivas não tiveram significância, pois no período de aplicação em R1, R4, R6, as plantas estavam com déficit hídrico, o que pode ter interferido no desenvolvimento das plantas.

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Nutrição com boro na soja em função da disponibilidade de água no solo

Cited by 6 publications

References 7 publications

Doses, methods and times of application of boron in soybean under field conditions

Doses, methods and times of application of boron in soybean under field conditions

Efficiency of critical level and compositional nutrient diagnosis methods to evaluate boron nutritional status in soybean

Manejo De Aplicação De Boro No Cultivo Da Soja

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