scholarly journals Adubação Suplementar de Nitrogênio na Soja Via Solo e Foliar na Fase Reprodutiva

UNICIÊNCIAS ◽  
2021 ◽  
Vol 24 (1) ◽  
pp. 24-29
Author(s):  
José Antonio Maior Bono ◽  
Talles Edmundo de Assis ◽  
André Luiz Araújo Martinelli
Keyword(s):  
Glycine Max ◽  
Nitrogen Fertilization ◽  
Bradyrhizobium Japonicum ◽  
Soybean Plant ◽  
Symbiotic Association ◽  
Biological Fixation ◽  
Productive Potential ◽  
Late Application ◽  
Bradyrhizobium Elkanii ◽  
N Demand

A planta de soja tem a associação simbiôntica com micro-organismos que têm a capacidade de fixar nitrogênio (N) e liberá-lo para as plantas. Nas cultivares de soja de alto potencial produtivo, a demanda por N estaria sendo atendida através da fixação biológica de nutrientes (FBN) ou haveria a necessidade de complementação deste nutriente para a cultura. Este trabalho teve como objetivo verificar a resposta da cultivar de soja Desafio inoculada com bactérias Bradyrhizobium japonicum e Bradyrhizobium elkanii, e com adubação nitrogenada suplementar na fase reprodutiva, via solo e via foliar. Os tratamentos constituíram da testemunha (sem aplicação de N), 30 e 60 kg de N ha-1 via solo e solução a 2% de N aplicados nas fases R1 e R5.3. O delineamento foi de blocos casualizados com quatro repetições e as  sementes foram inoculadas com bactérias das espécies Bradyrhizobium japonicum e Bradyrhizobium elkanii (estirpes Semia 587 e Semia 5019). A aplicação tardia de N em R1 e em R5.3 proporcionou aumento na produtividade de grãos de 478,6 kg ha-1 e 472,8 kg ha-1, respectivamente.  A aplicação via solo de N em R1 apresenta melhor índice de colheita, quando comparada com a R5.3. A aplicação tardia de solução de 2% de N, via foliar, não proporciona aumento na produtividade da cultura da soja.   Palavras-chave: Glycine max. Produtividade. Fixação Biológica. Adubação Nitrogenada.   Abstract The soybean plant has the symbiotic association with microorganisms that has the ability to fix nitrogen (N) and release it to the plants. Soybean cultivars with high productive potential, N demand would be met through biological nutrient fixation (BNF) or there would be a need to complement this nutrient for the crop. The objective of this work was to verify the response of soybean inoculated with bacteria of the genus Rhizobium and Bradyrhizobium, the supplementary nitrogen fertilization in the reproductive phase, soil and leaf pathway. The treatments consisted of control (without application of N), 30 and 60 kg of N ha-1  via soil and 2 % N solution applied in phases R1 and R5.3. The design was randomized   blocks with   4 replications and the seeds were inoculated with bacteria of the species Bradyrhizobium japonicum  and  Bradyrhizobium elkanii (strains Semia 587 and Semia 5019). The late application of N in R1 and R5.3 increased grain yield of 478.6 kg ha-1 and 472.8 kg ha-1, respectively.  The application, via soil, of N in R1 presents a better harvest index, when compared to R5.3. The late application of 2% N solution, via leaf, did not increase the soybean crop yield   Keywords: Glycine max. Productivity. Biological Fixation. Nitrogen Fertilization

scholarly journals Response of Soybean (Glycine max (L.) Merrill) to Mineral Nitrogen Fertilization and Bradyrhizobium japonicum Seed Inoculation

Agronomy ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1300
Author(s):  
Janusz Prusiński ◽  
Anna Baturo-Cieśniewska ◽  
Magdalena Borowska
Keyword(s):  
Nitrogen Fertilization ◽  
Bradyrhizobium Japonicum ◽  
Plant Density ◽  
Higher Plants ◽  
High Sensitivity ◽  
N Fertilization ◽  
Mineral N ◽  
Plant Nitrogen ◽  
Seed Inoculation ◽  
Glycine Max L

A growing interest in soybean cultivation in Poland has been observed in the recent years, however it faces a lot of difficulties resulting from a poorly understood effectiveness of plant nitrogen fertilization and from the introduction of Bradyrhizobium japonicum to the environment. The aim of the study was to evaluate the consistency of response of two soybean cultivars to three different rates of mineral N fertilization and two seed inoculation treatments with B. japonicum in field conditions over four years regardless of previous B. japonicum presence in the soil. A highly-diversified-over-years rainfall and temperature in the growing season do not allow for a definite statement of the differences resulting from seed inoculation and mineral N fertilization applied separately or jointly in soybean. A high sensitivity of the nodulation process to rainfall deficits was noted, which resulted in a decreased amount of B. japonicum DNA measured in qPCR and dry matter of nodules. ‘Annushka’ demonstrated a higher yield of seeds and protein, higher plants and the 1st pod setting. ‘Aldana’, due to a significant decrease in plant density, produced a higher number of pods, seeds per pod and the 1000 seed weight per plant. Both cultivars responded with an increase in the seed yield after seed inoculation with HiStick, also with an application of 30 and 60 kg N, as well as with Nitragina with 60 kg N.

scholarly journals Action of growth regulators on flowering and pod production of soybean cultivar Davis

1981 ◽  
Vol 38 (1) ◽  
pp. 99-112
Author(s):  
Paulo R.C. Castro ◽  
Roberto S. Moraes
Keyword(s):  
Glycine Max ◽  
Gibberellic Acid ◽  
Growth Regulators ◽  
Lower Number ◽  
Soybean Cultivar ◽  
Soybean Plant ◽  
Trimethylammonium Chloride ◽  
Triiodobenzoic Acid ◽  
Soybean Plants

This research deals with the effects of growth regulators on flowering and pod formation in soybean plant (Glycine max cv. Davis). Under greenhouse conditions, soybean plants were sprayed with 2,3,5-triiodobenzoic acid (TIBA) 20 ppm, Agrostemmin (1g/10 ml/3 l) gibberellic acid (GA) 100 ppm, and (2-chloroethyl) trimethylammonium chloride (CCC) 2,000 ppm. Application of TIBA increased number of flowers. 'Davis' soybean treated with CCC and TIBA presented a tendency to produce a lower number of pods.

scholarly journals Nitrogen fertilization of vegetables cultivated under no-tillage after cover crops

2017 ◽  
Vol 35 (1) ◽  
pp. 103-110 ◽  
Author(s):  
Roberto BF Branco ◽  
Sally F Blat ◽  
Tais GS Gimenes ◽  
Rodrigo HD Nowaki ◽  
Humberto S Araújo ◽  
...  
Keyword(s):  
Plant Growth ◽  
Cover Crops ◽  
Nitrogen Fertilization ◽  
Nitrate Concentration ◽  
Dry Mass ◽  
Growth And Yield ◽  
No Tillage ◽  
Biological Fixation ◽  
Sunn Hemp ◽  
Nitrogen Rates

ABSTRACT The production of horticultural crops in no-tillage and in rotation with cover crops reduces the dependency in nitrogen fertilizer, due to increased soil organic matter and by biological fixation performed by legumes. Thus, the aim of this work was to study rates of nitrogen fertilization and cover crops in the agronomic performance of tomato and broccoli grown under no-tillage. The experiment was conducted in a split plot design with four replications. Treatments consisted of cover crops, sunn hemp and millet, and four rates of nitrogen fertilization (0, 50, 100 and 200 kg/ha of nitrogen), for both the tomato and broccoli crops. All soil management was performed in no-tillage. For tomato crops we evaluated the plant growth, the nitrate concentration of sprouts and fruits and yield of commercial and non commercial fruits. For broccoli we evaluated plant growth and yield. There was an interaction effect between cover crop and nitrogen rates to tomato growth measured at 100 days after transplanting, for plant height, number of fruit bunches, dry mass of leaves and diameter of the stalk. The tomato commercial fruit number and yield showed maximum values with 137 and 134 kg/ha of N respectively, on the sunn hemp straw. The nitrate concentration of the tomato sprouts was linearly increasing with the increase of nitrogen rates, when grown on the millet straw. For broccoli production, the maximum fresh mass of commercial inflorescence was with 96 kg/ha of N, when grown on the millet straw.

scholarly journals Action of growth regulators on production of soybean cultivar Davis

1981 ◽  
Vol 38 (1) ◽  
pp. 127-138 ◽  
Author(s):  
Paulo R.C. Castro ◽  
Roberto S. Moraes
Keyword(s):  
Glycine Max ◽  
Gibberellic Acid ◽  
Growth Regulators ◽  
Seed Weight ◽  
Dry Weight ◽  
Soybean Plant ◽  
Trimethylammonium Chloride ◽  
Seed Number ◽  
Exogenous Growth ◽  
Soybean Plants

This research deals with the effects of exogenous growth regulators on production of soybean plant (Glycine max cv.. Davis) under greenhouse conditions, At the flower anthesis, 2,3,5-triiodobenzoic acid (TIBA) 20 ppm was applied. Other two applications with TiBA, with intervals of four days, were realized. Before flowering, Agrostemin (1 g/10 ml/3 1), gibberellic acid (GA) 100 ppm, and (2-chloroethyl) trimethylammonium chloride (CCC) 2,000 ppm were applied. It was observed that CCC and TIBA reduced stem dry weight. Soybean plants treated with TIBA reduced weight of pods without seeds , seed number and seed weight.

scholarly journals APLICAÇÃO FOLIAR DE NITROGÊNIO NA SOJA EM DIFERENTES FASES FENOLÓGICAS E INOCULAÇÃO COM Bradyrhizobium japonicum

Nativa ◽  
2018 ◽  
Vol 6 (4) ◽  
pp. 333 ◽  
Author(s):  
Willian Buratto ◽  
Weslley Buratto ◽  
Amanda Martins de Oliveira ◽  
Reginaldo De Oliveira ◽  
Gustavo Caione ◽  
...  
Keyword(s):  
Bradyrhizobium Japonicum ◽  
Aerial Part ◽  
Foliar Application ◽  
Leaf Nitrogen ◽  
State University ◽  
Biological Fixation ◽  
Mato Grosso ◽  
Soybean Crop ◽  
Randomized Experimental Design ◽  
Beginning Of Flowering

A adubação nitrogenada na cultura da soja, associada a inoculação com a bactéria Bradyrhizobium japonicum é uma prática comum na agricultura, no entanto, muito contestada. Objetivou-se neste estudo avaliar a resposta da soja à aplicação foliar de N em diferentes estádios fenológicos e à aplicação de inoculante com Bradyrhizobium japonicum. O experimento foi realizado em casa de vegetação da Universidade do Estado de Mato Grosso, Alta Floresta-MT. Foi utilizado o delineamento experimental inteiramente casualizado em arranjo fatorial 4x2, sendo quatro épocas de aplicação de nitrogênio (R1 - Início de floração, R3 - Final da floração, R5.1 - Grãos perceptíveis ao tato e R5.3 - Maioria das vagens entre 25-50% de granação) e presença ou ausência de Bradyrhizobium japonicum, com quatro repetições. Conclui-se que a aplicação de nitrogênio foliar na cultura da soja no estágio R1 proporcionou aumento no acúmulo de nitrogênio na parte aérea, no número de vagens e de grãos por planta. A presença do inoculante proporcionou maior número de vagens quando aplicou se N nas épocas R1 e R3, já para a matéria seca de parte aérea, o melhor resultado foi obtido, quando o N foi aplicado em R 5.3, na ausência do inoculante.Palavras-chave: adubação nitrogenada, fixação biológica, inoculante. LEAF APPLICATION OF NITROGEN IN DIFFERENT PHENOLOGICAL STAGES IN SOYBEAN AND INOCULATION WITH Bradyrhizobium japonicum ABSTRACT:Nitrogen fertilization in soybean crop, associated with inoculation with a bacterium Bradyrhizobium japonicum is a common practice in agriculture, however, much contested. The objective of this study was to evaluate the response of soybeans to foliar application of N in different stages of phenology and the application of inoculant with the diazotrophic bacterium Bradyrhizobium japonicum. The experiment was carried out in a greenhouse at the State University of Mato Grosso, Alta Floresta-MT. The completely randomized experimental design was used in a 4x2 factorial arrangement, with 4 nitrogen application times (R1 - Beginning of flowering, R3 - Final flowering, R5.1 - Grains perceptible to touch and R5.3 - Most pods between 25 -50% granulation) and presence or absence of Bradyrhizobium japonicum, with 4 replicates. It was concluded that the application of leaf nitrogen in the non-stage soybean crop provided an increase in the accumulation of nitrogen in the aerial part, there is no number of pods and grains per plant. The presence of the inoculant provided a larger number of pods when applicable. N in the periods R1 and R3, and for the aerial part dry matter, the best result obtained when it was obtained in R 5.3, in the absence of the inoculant.Keywords: nitrogen fertilization, biological fixation, inoculant.

scholarly journals PRODUTIVIDADE DE CANA-DE-AÇÚCAR FERTIRRIGADA COM DOSES DE N E INOCULADAS COM BACTÉRIAS DIAZOTRÓFICAS

Irriga ◽  
2018 ◽  
Vol 1 (1) ◽  
pp. 29-41 ◽  
Author(s):  
William José Dellabiglia ◽  
Glauber José de Castro Gava ◽  
Adolfo Bergamo Arlanch ◽  
Roberto Lyra Villas Boas ◽  
Heitor Cantarella ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
Irrigation Management ◽  
Research Unit ◽  
Diazotrophic Bacteria ◽  
Biological Fixation ◽  
Saccharum Spp ◽  
Nitrogen Levels ◽  
Sugarcane Yield ◽  
Subsurface Drip ◽  
E Mail

PRODUTIVIDADE DE CANA-DE-AÇÚCAR FERTIRRIGADA COM DOSES DE N E INOCULADAS COM BACTÉRIAS DIAZOTRÓFICAS*     WILLIAM JOSÉ DELLABIGLIA¹; GLAUBER JOSÉ DE CASTRO GAVA²; ADOLFO BERGAMO ARLANCH3; ROBERTO LYRA VILLAS BOAS4; HEITOR CANTARELLA5 E RAFFAELLA ROSSETTO6     * Artigo extraído da Dissertação do primeiro autor 1 Faculdade de Tecnologia de Botucatu (FATEC-BT), Av. José Ítalo Bacchi, s/n, Botucatu – SP – Brasil. E-mail: [email protected] 2 Pesquisador, Instituto Agronômico de Campinas (IAC), Rodovia SP 304, Km 304, Jaú, SP - Brasil. E-mail: [email protected] 3 Doutorando do Programa de Pós-Graduação em Irrigação e Drenagem, Universidade Estadual Paulista ‘‘Júlio Mesquita Filho’’ - UNESP/FCA, Rua José Barbosa de Barros, 1780, Botucatu, SP - Brasil. E-mail: [email protected] 4 Professor Doutor do Departamento de Recursos Naturais/Ciência do Solo, Universidade Estadual Paulista ‘‘Júlio Mesquita Filho’’ - UNESP/FCA, Rua José Barbosa de Barros, 1780, Botucatu, SP - Brasil. E-mail: [email protected] 5 Pesquisador, Instituto Agronômico de Campinas (IAC), Av. Barão de Itapura, 1481, Campinas, SP – Brasil. E-mail: [email protected] 6 Pesquisadora, Agência Paulista de Tecnologia (APTA), Rodovia SP 127, km 30, Piracicaba, SP – Brasil. E-mail: [email protected]     1 RESUMO   O objetivo deste trabalho foi avaliar a eficiência da inoculação de bactérias diazotróficas e da fertilização nitrogenada na produtividade e qualidade tecnológica da cana-de-açúcar (cana-planta), nos manejos: irrigado por gotejamento subsuperficial e de sequeiro.  O experimento foi conduzido na Unidade de Pesquisa Hélio de Moraes, do IAC, no município de Jaú, SP, (22°17’ S 48°34’ O, em Latossolo Vermelho). A variedade de cana-de-açúcar foi a RB92579. O delineamento experimental foi em blocos casualizados, composto por fatorial de 2 manejos de irrigação: irrigado (I) e não irrigado (NI), 2 manejos de inoculação: com inoculação (Inoc) e sem inoculação (Não inoc) com bactérias diazotróficas (BDs); e com 4 níveis de disponibilidade de nitrogênio (0, 70, 140 e 210 kg ha-1 de N), compondo assim 16 tratamentos com 4 repetições. O experimento teve duração de 365 dias, quando então foram realizadas as análises tecnológicas e determinou-se a produtividade de colmos (TCH) e de açúcar (TPH). A cana-de-açúcar elevou sua produtividade com a elevação das doses de nitrogênio. Nos tratamentos irrigados essa elevação foi maior comparando-se com os tratamentos não irrigados.   Palavras-chave: Saccharum spp.; gotejamento subsuperficial; adubação nitrogenada; fixação biológica do nitrogênio.     DELLABIGLIA, W. J.; GAVA, G. J. C.; ARLANCH, A. B.; BOAS, R. L. V.; CANTARELLA, H.; ROSSETTO, R. SUGARCANE YIELD FERTIGATION MANAGEMENT WITH DOSES OF N AND INOCULATED WITH DIAZOTROPHIC BACTERIA 2 ABSTRACT   The objective of this study was to evaluate the efficiency of inoculation with diazotrophic bacteria and nitrogen fertilization on yield and technological quality of sugarcane (cane plant), in the following managements: irrigated by subsurface drip and rainfed. The experiment was conducted at Hélio de Moraes Research Unit, of IAC in the municipality of Jaú, SP, (22 ° 17 'S 48 ° 34' O, Rhodic). The variety of sugarcane was RB92579. The experimental design was randomized blocks, composed by factorial of two irrigation management systems: irrigated (I) and non-irrigated (NI); and two-inoculation managements: with inoculation (Inoc) and without inoculation (No inoc) with diazotrophic bacterias (BDs); and 4 availability levels of nitrogen (0, 70, 140 and 210 kg ha-1 de N),  thus forming 16 treatments with 4 replications. The experiment lasted 365 days when then technological analysis was performed and determined sugarcane stalk yield (TCH) and sugar yield (TPH). The sugarcane raised its productivity with rising nitrogen levels. In irrigated treatments this increase was higher compared with non-irrigated treatments.   Keywords: Saccharum spp., subsurface drip, nitrogen fertilization, nitrogen biological fixation.  

scholarly journals Compatibilidad Quitosano-Bradyrhizobium aplicados a semillas y su efecto en el desarrollo vegetativo de soya (Glycine max (L.) Merrill)

2021 ◽  
pp. 869-887
Author(s):  
Daimy Costales-Menéndez ◽  
Maria Caridad Naápoles-García ◽  
Lisbel Travieso-Hernández ◽  
Omar Cartaya-Rubio ◽  
Alejandro Bernardo Falcón-Rodríguez
Keyword(s):  
Glycine Max ◽  
Glycine Max L ◽  
Bradyrhizobium Elkanii

Introducción. El quitosano y las rizobacterias promotoras del crecimiento vegetal son reconocidos bioestimulantes agrícolas por los beneficios biológicos que aportan a las plantas. Objetivo. Evaluar la aplicación conjunta de concentraciones de quitosano y el inoculante Azofert-S® sobre semillas de soya, en la supervivencia de Bradyrhizobium elkanii y el desarrollo vegetativo de las plantas. Materiales y métodos. La investigación se desarrolló en el cuarto de crecimiento de plantas del Departamento de Fisiología y Bioquímica Vegetal del Instituto Nacional de Ciencias Agrícolas de Cuba, en el año 2016. Se determinó el efecto del quitosano y el inoculante Azofert-S® aplicados a semillas de soya, en el número de bacterias viables en las semillas y en el comportamiento de indicadores morfoagronómicos y fisio-bioquímicos relacionados con la nodulación y el desarrollo vegetativo de las plantas. Resultados. Las concentraciones de quitosano evaluadas en el ensayo de compatibilidad no afectaron el número de células viables en las semillas, excepto 500 y 1000 mg l-1, que mejoraron la supervivencia de la bacteria al comienzo del ensayo y 500 mg l-1 a los diez días de almacenamiento de las semillas. Esta última concentración benefició también la longitud radical y del tallo, el área foliar y la actividad enzimática de la nitrato reductasa en hojas. La aplicación combinada de Azofert® - quitosano y la sola inoculación de las semillas incrementó la concentración de nitrógeno y otros nutrientes en nódulos y trifoliolos. La concentración de flavonoides y de fenoles totales aumentó con la concentración de 10 mg l-1 de quitosano, aunque redujo la concentración de carbohidratos solubles totales y reductores en las hojas. Conclusión. Los bioestimulantes resultaron compatibles cuando se aplicaron sobre semillas en el momento de la siembra y beneficiaron la nodulación, la nutrición y el desarrollo vegetativo de las plantas de soya, en dependencia de la concentración del polímero.

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