Biological nitrogen fixation: An efficient source of nitrogen for sustainable agricultural production?

Peoples, Mark B.; Herridge, D. F.; Ladha, J. K.

doi:10.1007/bf00032239

Cited by 554 publications

(167 citation statements)

References 131 publications

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“…In the past, the principal goal was to increase the yield potential of food crops and to maximize productivity. Today, the drive for productivity is increasingly combined with a desire for sustainability (Peoples et al, 1995;Vieira et al, 2010). The effective management of N is an essential element of agricultural sustainability (Zahran, 2010;Vieira et al, 2010).…”

Section: Soybean Response To Inoculation With Bradyrhizobium Japonicumentioning

confidence: 99%

Soybean Response to Inoculation with Bradyrhizobium japonicum in the United States and Argentina

Leggett

Díaz‐Zorita²,

Koivunen

et al. 2017

Agronomy Journal

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Although the relevance of biological N nutrition of soybean [Glycine max (L.) Merr.] is recognized worldwide, inoculation with Bradyrhizobium japonicum shows variable results and the benefi t needs to be validated under current crop production practices. We conducted statistical analysis of soybean fi eld trial data to provide insight into factors aff ecting the effi cacy of soybean inoculation under contrasting crop production conditions. Most experimental sites, 187 trials in the United States and 152 trials in Argentina, were in soils with soybean history and naturalized B. japonicum strains. Yield increases were greater in Argentina (190 kg ha -1 equivalent to 6.39%) than in the United States (60 kg ha -1 equivalent to 1.67%). Tillage methods did not aff ect inoculant performance. In the United States, inoculation was more eff ective in soils with higher pH (>6.8) while in Argentina the greatest inoculation eff ect on crop production occurred in soils with a lower pH (<5.5). In the United States, where most of the trials were in rotation with corn (Zea mays L), the greatest positive eff ect of inoculation was observed in late planted soybean crops and independent of soil organic matter (SOM). In Argentina, the inoculant had its greatest eff ect in soils with no soybean history, a relatively high SOM, higher levels of soil extractable P and S, and in areas with greater precipitation during early reproductive growing stages. In both regions, the yield increases due to B. japonicum inoculation support the regular use of this practice to help provide adequate conditions for soybean production.M. Leggett, Novozymes BioAg, Research and Development, 3935 Th atcher Ave.,

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Section: Soybean Response To Inoculation With Bradyrhizobium Japonicumentioning

confidence: 99%

Soybean Response to Inoculation with Bradyrhizobium japonicum in the United States and Argentina

Leggett

Díaz‐Zorita²,

Koivunen

et al. 2017

Agronomy Journal

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“…Each seed was inoculated with 1 mL of a log phase rhizobial culture (10 9 cells mL −1 ). Growth conditions of faba bean plants were [12][13][14][15][16][17][18][19][20][21][22][23][24][25] • C (night/day), a relative humidity of 50%-60%, and a photoperiod of 10 hr. At flowering stage, 50 days after sowing, plants were uprooted and assayed for dry weight of nodules, shoots and roots dry weight, as well as shoot N-uptake by faba bean plants.…”

Section: Symbiotic Effectiveness Under Greenhouse Conditionsmentioning

confidence: 99%

“…Biological nitrogen fixation, especially rhizobia-legumes symbiosis, is one of the alternative solutions and the promising technologies which play an important role in reducing the consumption of chemical N-fertilizers, increasing soil fertility, decreasing the production cost, and eliminating the undesirable pollution impact of chemical fertilizers in the environment [13]. Worldwide, N 2 fixed by nodulated legumes (pulses and oilseeds legumes) is estimated to contribute 21.45 Tg N annually to global agricultural systems [14].…”

Section: Introductionmentioning

confidence: 99%

Improvement of Faba Bean Yield Using Rhizobium/Agrobacterium Inoculant in Low-Fertility Sandy Soil

2017

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Soil fertility is one of the major limiting factors for crop's productivity in Egypt and the world in general. Biological nitrogen fixation (BNF) has a great importance as a non-polluting and a cost-effective way to improve soil fertility through supplying N to different agricultural systems. Faba bean (Vicia faba L.) is one of the most efficient nitrogen-fixing legumes that can meet all of their N needs through BNF. Therefore, understanding the impact of rhizobial inoculation and contrasting soil rhizobia on nodulation and N 2 fixation in faba bean is crucial to optimize the crop yield, particularly under low fertility soil conditions. This study investigated the symbiotic effectiveness of 17 Rhizobium/Agrobacterium strains previously isolated from different Egyptian governorates in improving the nodulation and N 2 fixation in faba bean cv. Giza 843 under controlled greenhouse conditions. Five strains that had a high nitrogen-fixing capacity under greenhouse conditions were subsequently tested in field trials as faba bean inoculants at Ismaillia Governorate in northeast Egypt in comparison with the chemical N-fertilization treatment (96 kg N·ha −1 ). A starter N-dose (48 kg N·ha −1 ) was applied in combination with different Rhizobium inoculants. The field experiments were established at sites without a background of inoculation under low fertility sandy soil conditions over two successive winter growing seasons, 2012/2013 and 2013/2014. Under greenhouse conditions, inoculated plants produced significantly higher nodules dry weight, plant biomass, and shoot N-uptake than non-inoculated ones. In the first season (2012/2013), inoculation of field-grown faba bean showed significant improvements in seed yield (3.73-4.36 ton·ha −1 ) and seed N-yield (138-153 Kg N·ha −1 ), which were higher than the uninoculated control (48 kg N·ha −1 ) that produced 2.97 Kg·ha −1 and 95 kg N·ha −1 , respectively. Similarly, in the second season (2013/2014), inoculation significantly improved seed yield (3.16-4.68 ton·ha −1 ) and seed N-yield (98-155 Kg N·ha −1 ) relative to the uninoculated control (48 kg N·ha −1 ), which recorded 2.58 Kg·ha −1 and 80 kg N·ha −1 , respectively. Interestingly, faba bean inoculated with strain Rlv NGB-FR 126 showed significant increments in seed yield (35%-48%) and seed N-yield (34%-49%) compared to the inorganic N fertilizers treatment (96 kg N·ha −1 ) over the two cropping seasons, respectively. These results indicate that inoculation of faba bean with effective rhizobial strains can reduce the need for inorganic N fertilization to achieve higher crop yield under low fertility soil conditions.

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“…However, if the N source is urea, and the soybean cannot perform BNF, the figure has to be doubled to 266 kg urea/ha, since only about 40-50% of the applied urea-N can be utilized by the plant. Further according to People et al [2], the production of soybean globally is around 2 t/ha. This implies that soybean has to be able to produce 120 kg N/ha by BNF.…”

Section: Introduction * * * *mentioning

confidence: 99%

“…The high protein content of soybean, which ranges from 20 to 40%, needs a high input of N. Calculations by People et al [2] show that the production each ton/ha of this crop takes up 60 kg N/ha from soil. This figure is equal to the nitrogen content of 133 kg urea/ha.…”

Section: Introduction * * * *mentioning

confidence: 99%

Measuring the BNF of Soybean Using <sup>15</sup>N-Labelled Urea with Different Atom Excess (A.E.) Content

2013

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The soybean is a legume which has an ability to supply its major nitrogen need by the biological nitrogen fixation (BNF) process. This process is made possible by nodules formed in their roots, colonized by Rhizobium sp.bacteria. An accurate estimation of N gained by BNF is necessary to predict the increase or decrease of chemical fertilizer-N requirements to increase soybean production. Among several methods, the 15 N method was used to estimate the ability of legumes to perform BNF. The study involved soybean var. Willis (W) and a completely non-BNF soybean var. CV, which is termed as a standard crop. The standard crop is nonnodulated soybean, but it has the same main physiological traits with var. Willis. The aim of this study was to determine whether 15 N-labelled fertilizer with different %a.e. given to nodulated and non-nodulated soybean would not be of significant consequences for the calculation of N-BNF of W. The treatments applied were different rates of urea (20 kg N/ha and 100 kg N/ha) combined with different atom excess percentages (%a.e.) 15 N (2% and 10%). Thus, the combination of treatments were as follows:(1) W-ll (20 kg N; 2% a.e); (2) CV-hl (100 kg N; 2% a.e); (3) W-lh (20 kg N; 10% a.e); (4) CV-hh (100 kg N; 10% a.e); (5) CV-ll (20 kg N; 2% a.e); (6) W-hl (100 kg N; 2% a.e); (7) CV-lh (20 kg N; 10% a.e); (8) W-hh (100 kg N; 10% a.e). The result of the experiment showed that a high %a.e. with a low rate of 15 N and a low %a.e. with a high rate of N should be used to study the %N-BNF of nodulated plants.

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Biological nitrogen fixation: An efficient source of nitrogen for sustainable agricultural production?

Cited by 554 publications

References 131 publications

Soybean Response to Inoculation with Bradyrhizobium japonicum in the United States and Argentina

Soybean Response to Inoculation with Bradyrhizobium japonicum in the United States and Argentina

Improvement of Faba Bean Yield Using Rhizobium/Agrobacterium Inoculant in Low-Fertility Sandy Soil

Measuring the BNF of Soybean Using <sup>15</sup>N-Labelled Urea with Different Atom Excess (A.E.) Content

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