Aislamiento, caracterización molecular y evaluación de cepas fijadoras de nitrógeno en la promoción del crecimiento de frijol

Angeles-Núñez, Juan Gabriel; Cruz-Acosta, Teresa

doi:10.29312/remexca.v6i5.588

Cited by 4 publications

(4 citation statements)

References 22 publications

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“…In this regard, Samaddar et al (2021) indicate that alfalfa increases the availability of N in the soil and, consequently, increases crop yield. Ángeles and Cruz (2015) point out that, in some cases, alfalfa can supply up to 90% of the N requirements of the plant. The results indicate that alfalfa can help to reduce the use of nitrogen fertilizers, since maximum yields can be achieved by applying minimum amounts of N.…”

Section: Resultsmentioning

confidence: 99%

“…Alfalfa (Medicago sativa L.) (Fabaceae) can fix atmospheric nitrogen (N 2 ) through a symbiotic association with bacteria of the Rhizobium genus, converting this element to a form that the plants can assimilate (Delgado, 2015;Guzmán and Montero, 2021). It plays an important role in agriculture, as a consequence of its contribution to the reduction of the use of fossil energy and the emission of greenhouse gases produced by the use of nitrogen fertilizers (Ángeles and Cruz, 2015). Biological nitrogen fixation makes an important contribution to the N in the soil (Celaya and Castellanos, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Interaction between nitrogen doses and alfalfa (Medicago sativa L.) incorporation in lettuce (Lactuca sativa L.) production

Gómez¹,

Pérez

Zermeño-González³

et al. 2023

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Objective: To determine the optimal nitrogen dose combined with alfalfa in the growth, yield, and ion concentration in the sap of the lettuce leaf. Design/Methodology/Approach: We used a completely randomized experimental design, with a 2×5 factorial arrangement and nine repetitions in each treatment. The treatments consisted of five nitrogen doses (200, 250, 300, 350, and 400 kg ha-1) and two soil conditions (with and without alfalfa). Results: Aerial fresh weight (AFW), aerial dry weight (ADW), end-to-end diameter of the shoot (EDS), maximum diameter of the shoot (MDS), shoot weight (SW), and yield were higher when a 200-300 kg ha-1dose of N was applied along with alfalfa. This application had a similar effect to the 300 kg dose of N ha-1, applied without the addition of alfalfa. The concentration of nitrates (NO3-) in the sap decreased with the addition of alfalfa and 200 kg of N ha-1. The concentration of potassium (K+) was higher with or without the addition of alfalfa and 250 kg of N ha- 1. The concentration of calcium (Ca2+) was higher in the plants that received a 400-kg dose of N ha-1, whether alfalfa was included or not. Study Limitations/Implications: The lack of equipment prevented the determination of the nitrogen available in the soil. Findings/Conclusions: The incorporation of alfalfa into the soil is a good alternative to improve lettuce production and reduce the use of nitrogen fertilizers.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interaction between nitrogen doses and alfalfa (Medicago sativa L.) incorporation in lettuce (Lactuca sativa L.) production

Gómez¹,

Pérez

Zermeño-González³

et al. 2023

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“…High levels of nitrogen and phosphorus in water bodies can threaten the biodiversity of aquatic environments, disturb the stability of ecosystems, and lead to eutrophication [1]. The current denitrification methods used to solve the prevalent problem of water eutrophication can be classified as physicochemical or biological methods.…”

Section: Introductionmentioning

confidence: 99%

“…Constructed wetlands are extensively utilized in the treatment of domestic sewage [1], industrial wastewater [4], and black and malodorous water [5] due to their cost-effectiveness, ease of operation and maintenance, and environmentally friendly nature [6]. As a crucial component of constructed wetlands, plants, particularly submerged plants, are fully immersed beneath the water surface and come into direct contact with both sewage and microorganisms.…”

Section: Introductionmentioning

confidence: 99%

Impact of Gas-to-Water Ratio on Treatment Efficiency of Submerged-Macrophyte Constructed Wetland Systems

Mao,

Lu,

Huang

et al. 2024

Water

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Constructed wetland systems employing submerged macrophytes are increasingly utilized for treating municipal and industrial wastewater, as well as odoriferous and eutrophic water bodies. However, the pollutant removal efficiency of these systems needs further enhancement. In this study, we examined the impact of the gas-to-water ratio on the treatment efficiency of the constructed wetland of Vallisneria. We also examined the extracellular polymeric substances (EPSs) of the floating biofilm and the structure of the microbial community in this system. Our findings showed that the gas-to-water ratio significantly affects the total nitrogen (TN) removal rate within the Vallisneria wetlands, with an optimum removal at a gas-to-water ratio of 15:1, while the removal efficiencies for chemical oxygen demand (COD), NH4+-N, and total phosphorus (TP) remain relatively unaffected. Increased gas-to-water ratios corresponded to a notable decrease in biofilm EPSs. High-throughput sequencing analysis demonstrated a shift in biofilm-denitrifying bacteria from anoxic heterotrophic to aerobic denitrifiers, alongside a significant rise in the abundance of denitrifying bacteria, whereas excessively high gas-to-water ratios inhibited the growth of these bacteria. A gas-to-water ratio of 15:1 constituted the optimal condition for ecological restoration of the water body within the Vallisneria wetland systems. These results could contribute to the optimization of submerged-macrophyte constructed wetland system design and the enhancement of treatment efficiency.

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Impact of management of cover crop–soybean agroecosystems on rhizosphere microbial communities

Ortega

Vásquez²,

Alba³

et al. 2020

European J Soil Science

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Knowledge of the rhizosphere and use of quality microbial bioinputs are tools to achieve agricultural sustainability. The impact of management of cover crop–soybean agroecosystems on rhizosphere microbial communities was evaluated. A field experiment in a randomized complete block design with factorial arrangement in sub‐divided plots was performed. Effects of fertilization (0 and 45 kg·ha−1), oats, rye and control without cover crops, plant growth promoting rhizobacteria (PGPR) co‐inoculation of Azospirillum brasilense and Pseudomonas fluorescens, and three sampling times on microbial counts, community‐level physiological profiles (CLPP) and terminal restriction fragment length polymorphism (T‐RLFP) were studied. CLPP were drastically changed at three sampling times: before glyphosate, after glyphosate and at soybean harvest. Before glyphosate application, the interaction between PGPR inoculation and coverage treatments modified the functional and structural profiles of the rhizosphere microbial communities. Furthermore, the highest microbial counts and the greatest functional diversity indices were observed before glyphosate application but significantly decayed after glyphosate application and at soybean harvest, showing a permanent impact of glyphosate application on the rhizosphere microbial community functionality, which was confirmed with several statistical analyses. For the cover crop–soybean agroecosystems, we can conclude that the rhizosphere microbial communities showed high sensitivity to glyphosate. PGPR inoculation only increased the aerial biomass of rye at the jointing and grain‐filling stages. Inoculated plants without fertilization and non‐inoculated plants with fertilization showed similar aerial biomass production of this crop. This work demonstrates that different management decisions can change plant–microorganism relationships in the rhizospheres of cover crops and impact aboveground biomass production. A better understanding of microbial ecology will allow the sustainable use of available resources.Highlights A field experiment was conducted using oats and rye as cover crops in succession with soybean. Management decisions changed plant–microorganism relationships and impact on microbial ecology. Management of cover crops with glyphosate had negative impacts on rhizosphere microbial communities. Co‐inoculation with Azospirillum brasilense and Pseudomonas fluorescens increased the aerial biomass production of rye.

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Aislamiento, caracterización molecular y evaluación de cepas fijadoras de nitrógeno en la promoción del crecimiento de frijol

Cited by 4 publications

References 22 publications

Interaction between nitrogen doses and alfalfa (Medicago sativa L.) incorporation in lettuce (Lactuca sativa L.) production

Interaction between nitrogen doses and alfalfa (Medicago sativa L.) incorporation in lettuce (Lactuca sativa L.) production

Impact of Gas-to-Water Ratio on Treatment Efficiency of Submerged-Macrophyte Constructed Wetland Systems

Impact of management of cover crop–soybean agroecosystems on rhizosphere microbial communities

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