Effect of combined nitrogen on nitrogen fixation of soybean (Glycine max L. Merill.) as affected by cultivar and rhizobial strain

1987 ◽  
Vol 103 (1) ◽  
pp. 45-50 ◽  
Author(s):  
R. Senaratne ◽  
C. Amornpimol ◽  
G. Hardarson
Keyword(s):  
Nitrogen Fixation ◽  
Glycine Max ◽  
Rhizobial Strain ◽  
Combined Nitrogen ◽  
Glycine Max L

SOME EFFECTS OF WATERLOGGING AND SUPPLY OF COMBINED NITROGEN ON SOYBEAN GROWTH

1987 ◽  
Vol 67 (1) ◽  
pp. 69-77 ◽  
Author(s):  
B. R. BUTTERY
Keyword(s):  
Nitrogen Fixation ◽  
Fine Structure ◽  
Glycine Max ◽  
Water Table ◽  
Deleterious Effect ◽  
High Water ◽  
High Water Table ◽  
Atp Production ◽  
Combined Nitrogen ◽  
Glycine Max L

Five pot tests were conducted on the effects of waterlogging on soybean (Glycine max (L.) Merr.) growth in the presence or absence of nitrate. Plants grown outdoors in sand and a vermiculite/perlite mixture (V/P) gave relative weights of 75 and 100 in the presence of nitrate and 3 and 38 in its absence. In a growth chamber similar treatments produced values of 95 and 100 with nitrate, and 28 and 58 without nitrate. Soybeans in V/P flooded by preventing outflow (ST) or normally drained (D), gave relative weights in the ST and D treatments of 76 and 100 in the presence of nitrate, and 27 and 55 in its absence. Averaged over 21 cultivars, treatments of ST and D with nitrate, and of ST and D without nitrate gave values of 111, 100, 66 and 85. Differences between cultivars in reaction to flooding were small. Soybeans were also grown in V/P flooded by immersing pots in buckets of nutrient solution filled to the top of the pot (FB) or to a constant high water table, 85 mm below the pot surface (HB). Relative plant weights of 22, 100, 45 and 198 were obtained with nitrate, and 17, 79, 10 and 138 with no nitrate for ST, D, FB and HB treatments. All five experiments suggest that reduced availability of oxygen because of fine structure of the substrate or because of direct flooding has a more deleterious effect on soybean growth in the absence of combined N than in its presence. A high water table benefited soybean growth in comparison with normally watered and drained plants. The effects of respiration rate on speed of development of anoxic conditions, and the effects of nitrate on ATP production in both nodules and root tissue are discussed.Key words: Soybean, Glycine max (L.) Merr., waterlogging, combined nitrogen, nitrogen fixation, substrate aeration

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.

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