Soil quality indicators related to the deterioration of Kikuyu grass Cenchrus clandestinus (Hochst. ex Chiov.) Morrone DOI Creative Commons
Jorge Mario Noreña Grisales, Ramiro Ramírez Pisco,

Nelson Walter Orosio Vega

et al.

Revista Facultad Nacional de Agronomía Medellín, Journal Year: 2024, Volume and Issue: 77(3), P. 10811 - 10825

Published: Sept. 1, 2024

Inadequate grassland management has resulted in the degradation of extensive areas, loss productivity and sustainability many them, reflecting a common reality among livestock farmers Colombia. Therefore, at Paysandú Agricultural Station Universidad Nacional de Colombia, located Santa Elena township city Medellín, study was carried out to determine soil quality index (SQI) by evaluating physical chemical indicators that were most related deterioration dry matter production kikuyu grass (Cenchrus clandestinus). A minimum data set (MDS) established for sensitive indicators, selected principal component analysis (PCA), nonlinear scoring function used obtain SQI. Statistical differences found between all treatments relation (P<0.05: 1.91x10-32). The bulk density BD > total porosity TP macropores MAC micropores MIC penetration resistance PR effective cation exchange capacity ECEC pH. As result, following formula obtained: SQI = (0.225×BD) + (0.224×TP) (0.220×MAC) (0.218×MIC) (0.113×PR) (0.0879×ECEC) (0.0877×pH). This should be tested grass-dominated pastures Colombian high tropics. baseline is critical values 0.58 Mg m-3 2.25 MPa PR. In addition, optimum pH range development 5.4 6.4.

Language: Английский

Impact of climate warming on vegetation cover: positive effects of native artiodactyla vs. grazing pressure in Alborz Protected Area DOI Creative Commons
Farid Salmanpour, Zahra Shakoori, Mostafa Keshtkar

et al.

Frontiers in Conservation Science, Journal Year: 2025, Volume and Issue: 6

Published: Jan. 28, 2025

Introduction Climate warming, combined with grazing pressures, poses significant challenges to vegetation cover and ecosystem stability. In particular, livestock is a primary factor in degradation, adversely affecting plant diversity, soil health, key ecological interactions. Methods This study investigates the impact of on Alborz region Iran, focusing comparison between native herbivores (Artiodactyla) Central Protected Area (CAPA). We utilized 30 years NDVI (Normalized Difference Vegetation Index) data from May June (1994–2024) assess dynamics evaluate influence climate grazing. ANOVA, Pearson correlation, regression analyses were performed identify relationships cover, variables (temperature rainfall), intensity. Results show increase Golestanak (without livestock) exhibiting stronger positive response (R ² = 65%), while Zānoos (higher density) showed greater variability 58%). demonstrated more correlation temperature rainfall, reflecting resilience climatic stressors beneficial effect moderate by Artiodactyla. contrast, fluctuation trends due high pressure. Discussion highlights that warming can positively affect intensive impede these gains, underlining importance adaptive management strategies for maintaining health.

Language: Английский

Citations

1
Soil porosity as a key factor of soil aggregate stability: insights from restricted grazing DOI Creative Commons
Yongqiang Yang, Zhongju Meng, Haonian Li

et al.

Frontiers in Environmental Science, Journal Year: 2025, Volume and Issue: 12

Published: Jan. 24, 2025

Overgrazing leads to steppe degradation and soil structure deterioration, which is common in desert steppes. Restricted grazing a sustainable practice, but the mechanisms by responds restricted have received little attention. This study examined effects of two different management strategies, namely, free (CK), on indicators steppe. The further included exclusion (GE) seasonal (SG). Additionally, preliminary exploration was conducted identify main factors affecting aggregate stability. Our results demonstrated that GE significantly increased clay (&lt;0.002 mm) silt (0.002–0.02 0–10 cm 10–20 layers an average 71.27% 70.64%, respectively. SG mm), macroaggregates (&gt;0.25 layer. organic carbon 7.02 g/kg 7.45 g/kg, In addition, had no significant effect carbon. findings obtained from computations using boosted regression tree (BRT) that, within period, porosity affects stability compared other factors. Moreover, it possessed explanatory power surpassed 45%. Overall, better under than SG, key improving research will contribute more profound comprehension impact structure. Therefore, recommended closures be prioritized grasslands promote coordination between grassland restoration livestock development.

Language: Английский

Citations

0
Space–Time Dynamics of Mortality and Recruitment of Stems and Trees in a Seasonally Dry Tropical Forest: Effect of the 2012–2021 Droughts DOI Creative Commons
Maria Beatriz Ferreira, Rinaldo Luíz Caraciolo Ferreira, José Antônio Aleixo da Silva

et al.

Remote Sensing, Journal Year: 2025, Volume and Issue: 17(9), P. 1491 - 1491

Published: April 23, 2025

Seasonally dry tropical forests (SDTFs) represent about 41.5% of the planet’s forests. The objective this study was to characterize annual mortality and recruitment patterns stems trees between years 2012–2021 in a Caatinga remnant state Pernambuco, Brazil, through geostatistical modeling, associate drought events recorded region with vegetation dynamics. Mortality were monitored 80 permanent plots located an SDTF remnant, counted year by 2012 2021. standardized precipitation index (SPI) calculated quantify deficit or excess rainfall evaluated period. data then subjected analysis based on calculation classical semivariances. As result, there loss 68.33% 61.93% forest community during 2012–2021, which associated water caused SPI for region. Gaussian semivariogram model better represented spatial variability trees. An accumulative effect droughts increasing rates reducing period observed. relationship tree stem highlights impact vegetation, emphasizing importance considering extreme climatic proper management natural resources.

Language: Английский

Citations

0
The Role of Forest Conversion and Agroecological Practices in Enhancing Ecosystem Services in Tropical Oxisols of the Amazon Basin DOI Open Access
Tancredo Souza, Gislaine dos Santos Nascimento, Diego Silva Batista

et al.

Forests, Journal Year: 2025, Volume and Issue: 16(5), P. 740 - 740

Published: April 25, 2025

This study evaluates the effectiveness of agroecological practices—organic fertilization and biofertilization—in enhancing ecosystem services in agroforestry pasture systems. A field experiment was conducted over three years, comparing these practices to a control treatment natural as reference. Soil chemical, physical, biological parameters were assessed, including soil organic carbon (SOC), microbial respiration, root density, gene abundances key groups (Archaea, Bacteria, Fungi). Organic resulted significant increase SOC, phosphorus, biomass, indicating improved structure fertility. Biofertilization showed selective effects, promoting archaeal abundance but reducing bacterial fungal diversity. Seasonal variation influenced nutrient cycling, with buffering against dry-season declines activity availability. Aboveground dry biomass litter deposition highest ecosystem, followed by treatments Despite improvements under management, consistently maintained superior quality resilience. The findings highlight that inputs diversified cropping systems enhance health do not fully replicate ecological benefits undisturbed forests. In conclusion, provide viable alternatives mitigate degradation sustain tropical Oxisols. emerges most effective strategy, fostering long-term fertility dynamics. However, continued research is needed optimize for greater resilience sustainability Amazonian agroecosystems.

Language: Английский

Citations

0
Impact of the grazing ban on the forest soil nutrient dynamics in the Sikkim Himalaya, India DOI Creative Commons

Bharat Kumar Pradhan,

Ghanashyam Sharma,

Prakash Chhetri

et al.

Academia Biology, Journal Year: 2024, Volume and Issue: 2(3)

Published: Aug. 21, 2024

Language: Английский

Citations

0
Soil quality indicators related to the deterioration of Kikuyu grass Cenchrus clandestinus (Hochst. ex Chiov.) Morrone DOI Creative Commons
Jorge Mario Noreña Grisales, Ramiro Ramírez Pisco,

Nelson Walter Orosio Vega

et al.

Revista Facultad Nacional de Agronomía Medellín, Journal Year: 2024, Volume and Issue: 77(3), P. 10811 - 10825

Published: Sept. 1, 2024

Inadequate grassland management has resulted in the degradation of extensive areas, loss productivity and sustainability many them, reflecting a common reality among livestock farmers Colombia. Therefore, at Paysandú Agricultural Station Universidad Nacional de Colombia, located Santa Elena township city Medellín, study was carried out to determine soil quality index (SQI) by evaluating physical chemical indicators that were most related deterioration dry matter production kikuyu grass (Cenchrus clandestinus). A minimum data set (MDS) established for sensitive indicators, selected principal component analysis (PCA), nonlinear scoring function used obtain SQI. Statistical differences found between all treatments relation (P<0.05: 1.91x10-32). The bulk density BD > total porosity TP macropores MAC micropores MIC penetration resistance PR effective cation exchange capacity ECEC pH. As result, following formula obtained: SQI = (0.225×BD) + (0.224×TP) (0.220×MAC) (0.218×MIC) (0.113×PR) (0.0879×ECEC) (0.0877×pH). This should be tested grass-dominated pastures Colombian high tropics. baseline is critical values 0.58 Mg m-3 2.25 MPa PR. In addition, optimum pH range development 5.4 6.4.

Language: Английский

Citations

0