Importância Da Resistência De Plantas No Controle De Oídio: Um Levantamento De Cultivares De Soja No Brasil

Brasil, Suane de Oliveira Souza; Marques, Laís Dieb Lima; Silva, Regimara Francisca Bernardo da; Freitas, Diana Carolina Lima; Soardi, Karina

doi:10.30945/rcr-v20i2.324

Cited by 4 publications

(1 citation statement)

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“…According to CONAB data (2021), Brazil produced 124,844.8 and 134,451.1 thousand tons in the 2019/2020 and 2020/2021 crop seasons, respectively. Soybeans are widely used to produce vegetable oil, milk, fruit juice drinks, cookies, flour, food supplements, ice cream, animal feed, biofuel, and other products (Brasil et al, 2018). Soybean is listed as the most representative crop in grain production and cultivated area in Brazil, producing more protein per area than any other crop.…”

Section: Introductionmentioning

confidence: 99%

Yield Traits of Soybean Cultivated Under Brachiaria and Millet Straw and Potassium Doses

Firmiano

Mesquita

Rios

et al. 2022

Rev. Agric. Neotrop.

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There are many doubts about which straw-supplying species should be cultivated in a no-tillage system and which potassium doses are adequate for the Cerrado soils. Therefore, the current study aimed to evaluate the agronomic traits (plant height, first pod insertion height, and stem diameter); yield traits (number of pods per plant, number of grains per pod, and 100-grain weight), grain yield (kg ha-1) and potassium content in the leaves, in the production of soybean cultivated in different straws and potassium doses in two crop seasons under Cerrado conditions in the region of Ceres, Goiás, Brazil. Two types of straw (Brachiaria and millet) and four potassium doses were evaluated. A randomized complete block design arranged in a 2x2x4 factorial scheme with four repetitions was used. Two crop seasons (2011/2012 and 2012/2013), two types of straw (Millet and Brachiaria), and four potassium doses (0, 30, 60, and 90 kg ha-1 of K2O using KCl as source) were evaluated. Phosphate fertilization was performed using 400 kg ha-1 of simple superphosphate, and the cultivar used was P98Y12. The largest plant height values were obtained by applying 90 kg ha-1 of K2O. The Brachiaria straw promoted a grain yield increase associated with the potassium doses increment. The highest grain yield was 4,353.90 kg ha-1, achieved by applying 65 kg ha-1 of K2O using millet straw. The highest grain yield reached was at the rate of 90 kg ha-1 of K2O, resulting in 5,208 kg ha-1. The greatest K accumulation in the leaf is provided by Brachiaria straw.

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Section: Introductionmentioning

confidence: 99%

Yield Traits of Soybean Cultivated Under Brachiaria and Millet Straw and Potassium Doses

Firmiano

Mesquita

Rios

et al. 2022

Rev. Agric. Neotrop.

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Alternative products isolated and associated with fungicide at different sowing times to control soybean powdery mildew

Gabardo,

Harms,

Silva

2024

Cienc. Rural

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Soybean (Glycine max) is the most important legume cultivated in the world. With the aim of studying alternative products isolated and associated with fungicide on the efficiency of controlling powdery mildew (Microsphaera diffusa), in two sowing seasons, field experiments were conducted in Ponta Grossa, PR, Brazil, during the 2016/2017 and 2017/2018 seasons. The treatments were: 1- control (water), 2- Bacillus subtilis lineage QST, 3- Bacillus subtilis lineage QST associated with fungicide, 4- 1% chitosan, 5- 1% chitosan associated with fungicide, 6- sulfur, 7- sulfur associated with fungicide, 8- sodium hypochlorite, 9- sodium hypochlorite associated with fungicide, 10- fungicide (2 applications) and 11- fungicide (3 apllications). In all fungicide treatments, azoxystrobin + benzovindiflupyr with adjuvant was used. The variables evaluated were: powdery mildew severity and yield. The severity data made it possible to calculate the area under the disease progress curve (AUDPC). AUDPC values were higher in the second sowing season. Sulfur, chitosan and B. subtilis, isolated, reduced AUDPC, but when associated with the fungicide they obtained superior results. Sulfur, whether or not associated with the fungicide, provided less severity of the disease. The fungicide applied three times showed better control than two applications. The highest yield averages were, obtained in the first sowing season. There was no difference between the treatments during sowing in October for yield, this was affected by the treatments, only in the second sowing season, highlighting the sulfur associated with the fungicide.

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Soybean Population Management Seeking Greater Grain Productivity

Menegon,

De Lima,

Alves

et al. 2023

RGSA

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Objective: The objective of this research was to evaluate plant growth, soybean grain yield and production cost depending on the use of different populations. Theoretical reference: Among management practices, plant population is an extremely important stage for the establishment of soybean crops. In many cases, just changing the plant population is enough to result in high gains in crop grain productivity. Methodology: A randomized block design was used, with four treatments and four replications. The treatments consisted of densities of 200, 250, 300 and 350 thousand seeds ha-1. Plant height, insertion height of the first pod, number of pods per plant, number of grains per pod, mass of one thousand grains and grain productivity were evaluated. Results and conclusion: Populations influenced grain productivity, with the highest productivity being achieved in the population of 250 thousand, 5905 kg ha-1. It was concluded that sowing density affects the number of pods per plant and soybean grain productivity. The density of 250 thousand seeds ha-1 was the one that provided the highest productivity of soybeans and the lowest sowing cost. Research implications: Determining the best population of soybean plants in different locations is essential to reduce producer costs. Originality/value: Most research works focus on the use of inputs, disregarding that the plant population can affect crop performance and production costs.

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Importância Da Resistência De Plantas No Controle De Oídio: Um Levantamento De Cultivares De Soja No Brasil

Cited by 4 publications

References 0 publications

Yield Traits of Soybean Cultivated Under Brachiaria and Millet Straw and Potassium Doses

Yield Traits of Soybean Cultivated Under Brachiaria and Millet Straw and Potassium Doses

Alternative products isolated and associated with fungicide at different sowing times to control soybean powdery mildew

Soybean Population Management Seeking Greater Grain Productivity

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