Response of Snap Bean Cultivars to Rhizobium Inoculation under Dryland Agriculture in Ethiopia

Beshir, Hussien Mohammed; Walley, F.L.; Bueckert, Rosalind; Tar’an, Bunyamin

doi:10.3390/agronomy5030291

Cited by 25 publications

(17 citation statements)

References 35 publications

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“…The lowest nodule dry weight per plant (2.8) was measured in uninoculated lentil under field conditions, but in the pot experiment the N fertilized pot produced the lowest nodule dry weight per plant (12.2). The current results are similar to previous reports [22,24,25] conducted on lentil and other grain legumes in which inoculation increased nodule number and dry weight. Note: plt-per plant, PlH-plant height, NB-number of branch, NP-number of pod, GY-grain yield, GW-grain weight.…”

Section: Resultssupporting

confidence: 82%

Symbiotic Efficiency of Native and Exotic Rhizobium Strains Nodulating Lentil (Lens culinaris Medik.) in Soils of Southern Ethiopia

Tena

Wolde-meskel²,

Walley

2016

Agronomy

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Lentil plays a major role in the food and nutritional security of low income Ethiopian families because of the high protein content of their seed; however, their productivity typically is low largely due to soil fertility limitations. Field and pot experiments were conducted during the 2011 cropping season to determine the effectiveness of Rhizobium strains on two cultivars of lentil in Southern Ethiopia. Six rhizobial inoculant treatments (four indigenous and two commercial inoculants), a nitrogen (N) fertilizer treatment (50 kg¨urea¨ha´1) and an absolute control (non-inoculated non-fertilized) were used. Inoculated plants produced significantly higher nodule number, nodule dry weight, grain yield and yield components than non-inoculated non-fertilized plants. Inoculation of field grown lentil with rhizobia strain Lt29 and Lt5 enhanced seed yield by 59% and 44%, respectively. Whereas urea fertilization enhanced yields by 40%. Similarly, grain yields were increased during the pot experiment by 92% and 67% over the control treatments by inoculation with Lt29 and Lt5, respectively. The highest levels of N fixation were achieved in plants inoculated with Lt29 (65.7% Ndfa). Both field and pot investigations indicate that inoculation of lentil with native rhizobial strains replace the need for inorganic N fertilization to optimize lentil yields.

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Section: Resultssupporting

confidence: 82%

Symbiotic Efficiency of Native and Exotic Rhizobium Strains Nodulating Lentil (Lens culinaris Medik.) in Soils of Southern Ethiopia

Tena

Wolde-meskel²,

Walley

2016

Agronomy

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“…Although the quantity of soil N available to the durum wheat was similar between the pulse-and summerfallow-based systems, the source of the N differed considerably. The increased available N in the pulse systems reflects the process by which the plants fix atmospheric N 2 through symbiosis with soil Rhizobium and the decomposition of the N-rich crop residues, a biological process that is environmentally friendly 22,43 . By contrast, the increased soil N with summerfallow systems is mainly through 'mining' the soil and accelerating the depletion of the soil organic matter 23 , which is a soil-degrading and environmentally detrimental approach 44 .…”

Section: Discussionmentioning

confidence: 99%

Diversifying crop rotations with pulses enhances system productivity

Gan¹,

Hamel²,

Cutforth³

et al. 2016

Crops & Soils

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Agriculture in rainfed dry areas is often challenged by inadequate water and nutrient supplies. Summerfallowing has been used to conserve rainwater and promote the release of nitrogen via the N mineralization of soil organic matter. However, summerfallowing leaves land without any crops planted for one entire growing season, creating lost production opportunity. Additionally, summerfallowing has serious environmental consequences. It is unknown whether alternative systems can be developed to retain the beneficial features of summerfallowing with little or no environmental impact. Here, we show that diversifying cropping systems with pulse crops can enhance soil water conservation, improve soil N availability, and increase system productivity. A 3-yr cropping sequence study, repeated for five cycles in Saskatchewan from 2005 to 2011, shows that both pulse-and summerfallow-based systems enhances soil N availability, but the pulse system employs biological fixation of atmospheric N 2 , whereas the summerfallow-system relies on 'mining' soil N with depleting soil organic matter. In a 3-yr cropping cycle, the pulse system increased total grain production by 35.5%, improved protein yield by 50.9%, and enhanced fertilizer-N use efficiency by 33.0% over the summerfallow system. Diversifying cropping systems with pulses can serve as an effective alternative to summerfallowing in rainfed dry areas.

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“…The important issue regarding the depressive effect on N fixation arising from the use of N rates in legume crops is still not duly considered. In fact, other reports based on the comparison of different inoculants or strains coupled with N applications in different legume species such as lentil, snap bean, and faba bean are available [34,51,52]. However, the same authors did not measure or consider that higher yields supported by N fertilization might reduce the N fixation efficiency of the same symbiosis.…”

Section: Discussionmentioning

confidence: 99%

Inoculation and N Fertilization Affect the Dry Matter, N Fixation, and Bioactive Compounds in Sulla Leaves

et al. 2019

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Sulla (Sulla coronaria [L.] Medik), a Mediterranean short-lived legume with tolerance to drought-prone environments, requires inoculation outside its natural habitat. Its leaves are appreciated for the bromatological composition and content of bioactive compounds. However, no information is available regarding the distinct effects of inoculation and nitrogen (N) applications on leaf dry matter (DM), fixed N, and bioactive compounds. Sulla leaves were sampled from the vegetative stage to seed set in Sardinia (Italy) during 2013-2014 and leaf DM, N content, and fixed N were determined. Compared to the best performing inoculated treatments, DM yield and fixed N values of the control only represented 8% to 20% and 2% to 9%, respectively. A significant relationship between fixed N and leaf DM yield was established, reaching 30 kg fixed N t -1 at seed set. Significant variations in leaf atom% 15 N excess and %Ndfa quantified decreases in leaf N fixation coupled with N application. Moreover, the petiole content of phenolic compounds markedly increased in the uninoculated control, suggesting deeper investigations on the relationship between bioactive compounds and inoculation treatments. Results highlighted substantial variation in DM, N yields, N-fixation ability, and content of bioactive compounds of sulla leaves caused by inoculation and N fertilization.

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Response of Snap Bean Cultivars to Rhizobium Inoculation under Dryland Agriculture in Ethiopia

Cited by 25 publications

References 35 publications

Symbiotic Efficiency of Native and Exotic Rhizobium Strains Nodulating Lentil (Lens culinaris Medik.) in Soils of Southern Ethiopia

Symbiotic Efficiency of Native and Exotic Rhizobium Strains Nodulating Lentil (Lens culinaris Medik.) in Soils of Southern Ethiopia

Diversifying crop rotations with pulses enhances system productivity

Inoculation and N Fertilization Affect the Dry Matter, N Fixation, and Bioactive Compounds in Sulla Leaves

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