scholarly journals Biological nitrogen fixation and agronomic features of soybean (Glycine max (L.) Merr.) crop under different doses of inoculant

2018 ◽  
Vol 67 (2) ◽  
pp. 297-302 ◽  
Author(s):  
Alessandro Pedrozo ◽  
Nelson João Girelli de Oliveira ◽  
Odair Alberton
Keyword(s):  
Nitrogen Fixation ◽  
Glycine Max ◽  
Biological Nitrogen Fixation ◽  
Bradyrhizobium Japonicum ◽  
Glycine Max L ◽  
Agronomic Features ◽  
Biological Nitrogen ◽  
Different Doses

La soya es uno de los cultivos más importantes del mundo y presenta una gran versatilidad. Este estudio tiene como objetivo investigar el efecto del inoculante Bradyrhizobium japonicum a 0, 600 y 1200 ml ha-1 en cultivo de soya, con y sin 1 L ha-1 calcio (Ca 41%) + 0,4 L ha-1 boro (B 14 %). Las plantas se cultivaron durante 90 días en macetas de plástico con 3 kg de arena y vermiculita (v / v) tratadas en autoclave a 121°C durante 1 h. El experimento se realizó en un diseño completamente aleatorizado con cinco repeticiones en un invernadero. Se evaluaron los parámetros de rendimiento de soja, tales como, peso seco del brote, raíz y total; altura de la planta, nitrógeno en el brote; número y peso seco de los nódulos; índice de clorofila en las hojas; cantidad de mazorcas por planta (NPPL); número de granos por pod (NGP); y número de granos por planta (NGPL). La adición de Ca + B aumentó significativamente NPPL, NGPL y NGP. El NPPL y NGPL se incrementaron significativamente con 600 mL ha-1 del inoculante. La dosis de 600 ml ha-1 del inoculante combinado con Ca + B estimuló significativamente NPPL, NGPL y NGP. Se concluye que la productividad de la soya se incrementó con la adición de 600 mL ha-1 de inoculante, en combinación con Ca y B.

13C isotope discrimination correlates with biological nitrogen fixation in soybean (Glycine max (L.) Merrill)

1992 ◽  
Vol 139 (1) ◽  
pp. 145-147 ◽  
Author(s):  
K. S. Kumarasinghe ◽  
C. Kirda ◽  
A. R. A. G. Mohamed ◽  
F. Zapata ◽  
S. K. A. Danso
Keyword(s):  
Nitrogen Fixation ◽  
Glycine Max ◽  
Biological Nitrogen Fixation ◽  
Isotope Discrimination ◽  
13C Isotope ◽  
Glycine Max L ◽  
Biological Nitrogen

scholarly journals Bradyrhizobium and azospirllum interaction in soybean cultivars (Glycine Max (l.) Merrill) and their effects on productivity

2020 ◽  
Vol 13 (1) ◽  
pp. 60
Author(s):  
T. O. D. Gonzaga ◽  
C. C. Vilar ◽  
A. S. Silva Filho ◽  
V. L. Silva
Keyword(s):  
Nitrogen Fixation ◽  
Glycine Max ◽  
Bradyrhizobium Japonicum ◽  
Azospirillum Brasilense ◽  
Productive Performance ◽  
Diazotrophic Bacteria ◽  
Glycine Max L ◽  
Major Producer ◽  
Growth Promoting ◽  
Biological Nitrogen

Brazil is a major producer of soybeans and a model in the use of biological nitrogen fixation, however, few authors are investigating the use of more than one genus of bacteria acting alone and / or together. An example is the use of the diazotrophic bacteria of the genus Bradyrhizobium and Azospirillum, the latter besides the fixation presents growth promoting function. Thus, the objective of this bibliographic review and to verify the influence on the productive performance Bradyrhizobium japonicum and Azospirillum brasilense, in the soybean crop. 

scholarly journals Raised seedbeds and irrigation increase the yield of soybean rotated with rice in lowland of Southern Brazil

2020 ◽  
Vol 55 ◽  
Author(s):  
Guilherme Vestena Cassol ◽  
Enio Marchesan ◽  
Joseph Harry Massey ◽  
Adroaldo Dias Robaina ◽  
Vinícius Severo Trivisiol ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Oryza Sativa ◽  
Glycine Max ◽  
Water Use ◽  
Biological Nitrogen Fixation ◽  
Field Experiments ◽  
Dry Weight ◽  
Southern Brazil ◽  
Nodule Number ◽  
Biological Nitrogen

Abstract: The objective of this work was to evaluate the effect of raised seedbeds associated with irrigation on the yield of soybean (Glycine max) rotated with rice (Oryza sativa) in lowland conditions in Southern Brazil. Field experiments were conducted in two crop seasons (2014/2015 and 2015/2016), with two planting systems (raised seedbed and flat planting) and two irrigation managements (irrigated and nonirrigated). Water use, biological nitrogen fixation, and yield were evaluated. The water used for raised seedbeds was 14% (151 m3 ha-1) and 27% (163 m3 ha-1) lower than that for flat planting in the first and second crop seasons, respectively. Irrigation increased nodule number per plant, nodule dry weight, and biological nitrogen fixation. The average grain yield of the raised seedbed system was 10% (529 kg ha-1) and 9% (362 kg ha-1) higher than that of flat planting in 2014/2015 and 2015/2016, respectively. Irrigation improved yield by 5% (203 kg ha-1) and 7% (265 kg ha-1) in each crop year. The use of raised seedbeds associated with irrigation improves the yield of soybean grown in rotation with rice in lowland in Southern Brazil.

scholarly journals Conservation Agriculture in Zambia: Effects on Selected Soil Properties and Biological Nitrogen Fixation in Soya Beans (Glycine max (L.) Merr)

2014 ◽  
Vol 3 (3) ◽  
pp. 28 ◽  
Author(s):  
Jane Muchabi ◽  
Obed I. Lungu ◽  
Alice M. Mweetwa
Keyword(s):  
Nitrogen Fixation ◽  
Glycine Max ◽  
Soil Respiration ◽  
Soil Properties ◽  
Biological Nitrogen Fixation ◽  
Management Practices ◽  
Conservation Agriculture ◽  
Crop Productivity ◽  
Conventional Tillage ◽  
Biological Nitrogen

<p>Conservation agriculture has been promoted in Zambia as a strategy to mitigate some of the negative effects arising from conventional tillage practices. Conservation agriculture offers several potential benefits on soil properties. However, these benefits and impacts vary across agro ecological regions and management practices. This study investigated changes, over time, associated with the practice of conservation agriculture in selected soil chemical, physical and biological properties, including an assessment of the effects on soil respiration, nodulation and biological nitrogen fixation in soya beans (<em>Glycine max </em>(L.) Merr). Six paired soil samples were collected from conservation agriculture and conventional tillage fields. Fields under conservation agriculture were 4, 7 and 16 years old while those under conventional tillage had been cultivated for over 18 years. Changes in soil properties due to conservation agriculture practice were determined using published laboratory procedures and compared using the paired t-test at 95% confidence level. The results indicated significantly higher soil pH, soil organic carbon, nodulation and biological nitrogen fixation under conservation agriculture than conventional tillage after seven years of practice. The study also showed significantly higher total porosity, soil microbial biomass, soil respiration and lower soil bulk density after sixteen years of practice. Based on these results, the practice of conservation agriculture has potential to improve crop productivity by improving the different aspects of soil fertility, the length of time before this is realized notwithstanding. Further studies that compare several conservation agriculture systems are recommended in other agro-ecological zones of the country to validate these findings.</p>

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