La producción lechera, el stres y la fertilidad

Hernández, Víctor Octavio Fuentes

doi:10.34188/bjaerv5n3-028

Cited by 1 publication

(3 citation statements)

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“…In general, these minerals are related to soil fertility and especially to nutrient storage and cation exchange capacity (CEC) (i.e., the number of sites available to store cations needed in the nutritional processes of the plant) [30]. The CEC is directly related to the amount of organic matter [41] and type of clay present in the soil, as well as to the organic matter content [42]. Phosphorus showed high levels in agroecological and organic systems, while in conventional systems they were excessive.…”

Section: Discussionmentioning

confidence: 99%

“…Phosphorus showed high levels in agroecological and organic systems, while in conventional systems they were excessive. Microelements such as Fe (82.6), Cu (4.71), and Mn (11.2) registered high values in organic systems, likely due to the application of minerals that help in the production of fruits and the synthesis and formation of chlorophyll [42].…”

Section: Discussionmentioning

confidence: 99%

“…In evaluating the physical parameters of the soils, the agroecological systems were found to be less susceptible to soil erosion, as they have a greater source of organic matter and the presence of accompanying plants that, together with clay and silt particles, form macro aggregates, giving greater stability to the soils [42]. In the organic and conventional systems, cleaner soils were observed, indicating the loss of fine soil particles by runoff and presenting a greater risk of erosion.…”

Section: Discussionmentioning

confidence: 99%

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Soil Bacterial Communities from Three Agricultural Production Systems in Rural Landscapes of Palmira, Colombia

Rugeles-Silva

Londoño

Prager

et al. 2023

Biology

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Soils play important roles in the proper functioning of agroecosystems. Using molecular characterization methods such as metabarcoding, soils from eight farms (57 samples) belonging to three production system types—agroecological (two farms with twenty-two sampling points), organic (three farms with twenty-one sampling points), and conventional (three farms with fourteen sampling points)—were compared from the rural villages of El Arenillo and El Mesón in Palmira, Colombia. Amplification and sequencing of the hypervariable V4 region of the 16S rRNA gene was performed using next-generation sequencing (Illumina MiSeq) to estimate the bacterial composition and the alpha and beta diversity present. Across all soil samples, we found 2 domains (Archaea and Bacteria), 56 phylum, 190 classes, 386 orders, 632 families, and 1101 genera to be present. The most abundant phyla in the three systems were Proteobacteria, (agroecological 28%, organic 30%, and conventional 27%), Acidobacteria (agroecological 22%, organic 21%, and conventional 24%), and Verrucomicrobia (agroecological 10%, organic 6%, and conventional 13%). We found 41 nitrogen-fixing and phosphate-dissolving genera which promote growth and pathogens. Alpha and beta diversity indices were very similar across the three agricultural production systems, as reflected by shared amplicon sequence variants (ASVs) among them, likely due to the proximity of the sampling sites and recent management changes.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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