Medicago Pasture Soil C:N:P Stoichiometry Mediated by N Fertilization in Northern China DOI Creative Commons

Bo Yuan,

Lijun Xu,

Jiaqiang Wei

et al.

Agronomy, Journal Year: 2025, Volume and Issue: 15(3), P. 724 - 724

Published: March 17, 2025

The degradation of black soil cropland has occurred to varying degrees in the northern agropastoral ecotone. Crop–forage rotation is an effective way improve quality, with Medicago being preferred perennial legume. C, N, and P stoichiometric ratios are key indicators quality organic matter composition, reflecting status internal cycles soil. This study aims investigate ecological grassland soils different planting durations, explore regulatory effects nitrogen fertilizer on carbon (SOC), total (TN), phosphorus (TP) content, assess impacts these changes ecosystem. was conducted long-term cultivated core experimental platform Hulunber National Field Station. Based forage yield nutrient measurements, field-based observations laboratory analyses were carried out. × varia subject, treatments: CK (0 kg N ha−1), N75 (75 N150 (150 ha−1). A randomized block design adopted. Variance analysis, boxplot statistics, scatterplot fitting methods used examine properties application stoichiometry established grasslands. results indicate that, based growth characteristics alfalfa, dynamics, its effectiveness improving optimal period for alfalfa ecotone 4–5 years, but it can also be shortened 3 years. Soil carbon, nitrogen, contents significantly influenced by duration. As years increase, first increase then decrease, while content initially decreases followed a slight increase. pH gradually rises both depth. Both low high levels reduce concentration (by 0.40% 10.14%, respectively). Low increases 1.50%), whereas 7.6%). 36.67% 35.26%, For from planted 8 carbon-to-nitrogen ratio ranges 9.08 9.76, carbon-to-phosphorus 13.00 151.32, nitrogen-to-phosphorus 1.65 17.14. In summary, primarily rate, duration, ratios, pH. Nitrogen positive effect ratios. annual reach 8.94 10.07 tons per hectare., remains limiting factor. These findings provide crucial data understanding impact crop–forage cycles, as well land use improvement.

Language: Английский

Physicochemical Aspects Regarding the Sustainable Conversion of Carwash Slurry as Coverage Admixture for Landfills DOI Open Access
Simona Elena Avram, Lucian Barbu‐Tudoran,

Gheorghe Borodi

et al.

Sustainability, Journal Year: 2025, Volume and Issue: 17(7), P. 2906 - 2906

Published: March 25, 2025

Transport and vehicle traffic are closely connected with particulate matter (PM) pollution, inducing various fractions into the atmosphere, some of them forming significant deposits on surface car. They washed away during carwash-inducing slurries collecting PM deposits, which characteristic a large area. Crystalline was investigated by XRD coupled polarized optical microscopy (POM). Organic matters were Fourier-Transform Infrared spectrometry (FTIR) gas chromatography, GC-MS. Their microstructure elemental composition SEM-EDX. The crystalline features contain mainly quartz, calcite, clay (muscovite kaolinite) particles having traces goethite lepidocrocite. Slurry particle size distribution established sieving following meshes: 63 µm, 125 250 500 1000 2000 4000 µm. Coarse 250–4000 μm dominated quartz calcite particles. amount decreases size, while muscovite kaolinite increases in finest 0–125 μm. evidenced, firstly, FTIR spectroscopy, revealing mostly CH2; C=O, NH4 bonds that more intense for fine fractions. organic form amorphous crusts associated micro- nano-plastic related to phthalates washing detergents. Atomic Force Microscopy revealed their range between 60 90 nm evidenced nanoparticles within samples. nanofractions adhere bigger humid environments, assuring immobilization reduce hazardous potential. Carwash slurry blending fertile soil ensures proper grass seed germination growth at mixtures up 60% slurry, allowing its sustainable reconversion as landfill dump rehabilitation, preventing emission hazard. Blended compositions containing than have noxious effects seeds, inhibiting germination.

Language: Английский

Citations

1
Medicago Pasture Soil C:N:P Stoichiometry Mediated by N Fertilization in Northern China DOI Creative Commons

Bo Yuan,

Lijun Xu,

Jiaqiang Wei

et al.

Agronomy, Journal Year: 2025, Volume and Issue: 15(3), P. 724 - 724

Published: March 17, 2025

The degradation of black soil cropland has occurred to varying degrees in the northern agropastoral ecotone. Crop–forage rotation is an effective way improve quality, with Medicago being preferred perennial legume. C, N, and P stoichiometric ratios are key indicators quality organic matter composition, reflecting status internal cycles soil. This study aims investigate ecological grassland soils different planting durations, explore regulatory effects nitrogen fertilizer on carbon (SOC), total (TN), phosphorus (TP) content, assess impacts these changes ecosystem. was conducted long-term cultivated core experimental platform Hulunber National Field Station. Based forage yield nutrient measurements, field-based observations laboratory analyses were carried out. × varia subject, treatments: CK (0 kg N ha−1), N75 (75 N150 (150 ha−1). A randomized block design adopted. Variance analysis, boxplot statistics, scatterplot fitting methods used examine properties application stoichiometry established grasslands. results indicate that, based growth characteristics alfalfa, dynamics, its effectiveness improving optimal period for alfalfa ecotone 4–5 years, but it can also be shortened 3 years. Soil carbon, nitrogen, contents significantly influenced by duration. As years increase, first increase then decrease, while content initially decreases followed a slight increase. pH gradually rises both depth. Both low high levels reduce concentration (by 0.40% 10.14%, respectively). Low increases 1.50%), whereas 7.6%). 36.67% 35.26%, For from planted 8 carbon-to-nitrogen ratio ranges 9.08 9.76, carbon-to-phosphorus 13.00 151.32, nitrogen-to-phosphorus 1.65 17.14. In summary, primarily rate, duration, ratios, pH. Nitrogen positive effect ratios. annual reach 8.94 10.07 tons per hectare., remains limiting factor. These findings provide crucial data understanding impact crop–forage cycles, as well land use improvement.

Language: Английский

Citations

0