Biological nitrification inhibition and forage productivity of Megathyrsus maximus in Colombian dry tropics

Carvajal‐Tapia, Juliana Isabel; Velasco, Sandra Morales; Villegas, Daniel; Arango, Jacobo; Quila, Nelson José Vivas

doi:10.17221/445/2020-pse

Cited by 7 publications

(6 citation statements)

References 31 publications

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“…Similar values for Mulato II and Toledo in monoculture, but lower than the 133.8 cm on average presented for Mombasa, thus indicating a better adaptation of this cultivar to the conditions of the Colombian dry tropics. In the same area of this study, Carvajal-Tapia et al (2021) reported an average height of 130 cm for a collection of 130 accessions of Megatyrsus maximus. Those authors mentioned the good agronomic development of this species under the conditions of the region.…”

Section: Results and Discussion Vigour Height Coverage And Presence O...mentioning

confidence: 85%

AGRONOMIC EVALUATION OF TROPICAL GRASSES ASSOCIATED WITH Canavalia brasiliensis IN DRY TROPIC

Carrillo-Hernández

Galindez

Velasco

et al. 2022

agro

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Livestock production in some tropical regions is characterized by the use of naturalized forages in extensive management with low production rates. The use of improved grass-legume associations represents a sustainable intensification opportunity for this type of agroecosystems. The objective was to evaluate the production in establishment of forage associations for grazing systems in the dry tropics of Colombia. In a randomized complete block design with slope as the block factor and experimental units of 2700 m2 with four replications, the agronomic and nutritional quality characteristics of six treatments were compared: Urochloa hybrid cultivar Mulato II, U. brizantha cultivar Toledo and Megathyrsus maximus cultivar Mombasa, established alone or associated with Canavalia brasiliensis, against the control Dichantium aristatum, a naturalized forage of the region. Mulato II, Toledo and Mombasa alone and in association showed greater (p ≤ 0.05) vigour, height, cover and forage production than the control. Mombasa produced 10.7 Mg ha-1 MS (Megagrams of dry matter per hectare), exceeding (p ≤ 0.05) by 74, 53 and 84 % that were recorded in Mulato II, Toledo and control, respectively. C. brasilienses promoted higher productivity in the association with Mulato II and improved nutritional characteristics in the associations with Toledo and Mombasa compared to specific monocultures and the control. The improved grasses alone or associated with C. brasiliensis were a better forage option than Dichantium aristatum. It was concluded that M. maximus and Urochloa hybrid associated with C. brasiliensis are relevant forage options for agroecologically similar regions to the Colombian dry tropics.

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Section: Results and Discussion Vigour Height Coverage And Presence O...mentioning

confidence: 85%

AGRONOMIC EVALUATION OF TROPICAL GRASSES ASSOCIATED WITH Canavalia brasiliensis IN DRY TROPIC

Carrillo-Hernández

Galindez

Velasco

et al. 2022

agro

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“…These were stable and consistently showed good values for all the variables and harvests evaluated. Accession 16062 showed potential for biological nitrification inhibition capacity (Carvajal‐Tapia, Mazabel, et al., 2021) and was classified in the group of accessions with the best nutritional profile in the rainy and dry season (Carvajal‐Tapia, Morales Velasco, et al., 2021).…”

Section: Resultsmentioning

confidence: 99%

“…It is adequate for associated pastures (Martínez‐Mamian et al., 2020) and for silvopastoral systems (Barragán‐Hernández & Cajas‐Girón, 2019; Paciullo et al., 2017; Santiago‐Hernández et al., 2016). It exhibits strength, resistance, and persistency under negative edaphoclimatic conditions in the dry tropics, with materials that report adequate nutritional composition (Carvajal‐Tapia, Morales Velasco, et al., 2021), and it shows characteristics of potential biological nitrification inhibition (Carvajal‐Tapia, Mazabel, et al., 2021; Villegas et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

Multivariate and multiharvesting trial for agronomic traits in the genetic resources of guineagrass

et al. 2022

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The diversity and use of forages and grasslands for animal feeding are essential in tropical livestock systems. Seasonal changes are mainly marked by variations in precipitation patterns. Grasslands are managed as perennial crops and therefore must be resilient to tolerate both dry and rainy seasons. The integration of animal production with the genetic aspects of forages is important for helping to identify resilient alternatives for sustainability in livestock systems. This study developed a multivariate and multiharvesting trial (MHT) for plant height, green forage weight (GFW), and dry matter yield (DMY) in a diversity panel of 130 accessions of guineagrass [Megathyrsus maximus (Jacq.) B.K. Simon & S.W.L. Jacobs] established in the Patía Valley of Colombia. Our study aims to identify interactions among weather conditions and different genotypes for agronomic variables as well as identify outstanding accessions for their productivity and adaptability. The entry mean heritability values were .88, .47, and .39 for the traits plant height, GFW, and DMY, respectively. The genetic correlations among different harvests ranged .5–.9 for plant height and .2–.9 for GFW. Heritability and genetic correlations suggest that plant height and yield are largely influenced by plant genetic effects. The correlation among plant height and yield was .42 for GFW and .33 for DMY. Negative correlations were not found in the agronomic behavior of the materials among the harvests under rainy and dry conditions. The MHT analyzed under the methodology of factor analysis revealed that accessions 16062 and 6982 stood out consistently for plant height, GFW, and DMY across different harvests. These findings strengthen processes in the search for resilient forages in the transition toward eco‐efficient livestock production and provide knowledge on which agronomic variables and forage materials to select, according to criteria of interest to both producers and plant breeders.

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“…Agrosavia Sabanera. This Guinea grass is recognized as one of the best species that improves beef and milk production, especially in tropical countries ( Villegas et al, 2020 ; Carvajal-Tapia et al, 2021 ). In addition, this pasture crop has an excellent nutritional quality and the ability to tolerate adverse abiotic conditions (e.g., drought), being a species of interest for arid regions ( Benabderrahim and Elfalleh, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

Top-Down Enrichment Strategy to Co-cultivate Lactic Acid and Lignocellulolytic Bacteria From the Megathyrsus maximus Phyllosphere

et al. 2021

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Traditionally, starting inoculants have been applied to improve ensiling of forage used for livestock feed. Here, we aimed to build up a bioinoculant composed of lactic acid-producing and lignocellulolytic bacteria (LB) derived from the Megathyrsus maximus (guinea grass) phyllosphere. For this, the dilution-to-stimulation approach was used, including a sequential modification of the starting culture medium [Man, Rogosa, and Sharpe (MRS) broth] by addition of plant biomass (PB) and elimination of labile carbon sources. Along 10 growth-dilution steps (T1–T10), slight differences were observed in terms of bacterial diversity and composition. After the sixth subculture, the consortium started to degrade PB, decreasing its growth rate. The co-existence of Enterobacteriales (fast growers and highly abundance), Actinomycetales, Bacillales, and Lactobacillales species was observed at the end of the selection process. However, a significant structural change was noticed when the mixed consortium was cultivated in higher volume (500ml) for 8days, mainly increasing the proportion of Paenibacillaceae populations. Interestingly, Actinomycetales, Bacillales, and Lactobacillales respond positively to a pH decrease (4–5), suggesting a relevant role within a further silage process. Moreover, gene-centric metagenomic analysis showed an increase of (hemi)cellulose-degrading enzymes (HDEs) during the enrichment strategy. Reconstruction of metagenome-assembled genomes (MAGs) revealed that Paenibacillus, Cellulosimicrobium, and Sphingomonas appear as key (hemi)cellulolytic members (harboring endo-glucanases/xylanases, arabinofuranosidases, and esterases), whereas Enterococcus and Cellulosimicrobium have the potential to degrade oligosaccharides, metabolize xylose and might produce lactic acid through the phosphoketolase (PK) pathway. Based on this evidence, we conclude that our innovative top-down strategy enriched a unique bacterial consortium that could be useful in biotechnological applications, including the development/design of a synthetic bioinoculant to improve silage processes.

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Biological nitrification inhibition and forage productivity of Megathyrsus maximus in Colombian dry tropics

Cited by 7 publications

References 31 publications

AGRONOMIC EVALUATION OF TROPICAL GRASSES ASSOCIATED WITH Canavalia brasiliensis IN DRY TROPIC

AGRONOMIC EVALUATION OF TROPICAL GRASSES ASSOCIATED WITH Canavalia brasiliensis IN DRY TROPIC

Multivariate and multiharvesting trial for agronomic traits in the genetic resources of guineagrass

Top-Down Enrichment Strategy to Co-cultivate Lactic Acid and Lignocellulolytic Bacteria From the Megathyrsus maximus Phyllosphere

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