Migration mechanisms of soil carbon and nitrogen element during the natural restoration process in coal mining subsidence areas DOI

Yantang Wang,

Chunming Hao,

Kaikai He

et al.

Chemistry and Ecology, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 25

Published: Nov. 15, 2024

Understanding the movement and alteration of carbon nitrogen elements in soil is crucial for addressing ecological restoration coal mining subsidence areas. However, migration process mechanisms these during natural remain unclear. This study analysed fluctuating variations formation TC TN content profiles at different times Initially, both contents decreased followed by an increase process. Soil compaction effects, variation C/N ratio, enzyme activity were considered as predominant factors controlling element cycles collapsed profiles. will provide valuable insights into understanding behind recovery while establishing a scientific basis

Language: Английский

A Spatiotemporal Attention-Guided Graph Neural Network for Precise Hyperspectral Estimation of Corn Nitrogen Content DOI Creative Commons
Feiyu Lu, Boming Zhang, Y. R. Hou

et al.

Agronomy, Journal Year: 2025, Volume and Issue: 15(5), P. 1041 - 1041

Published: April 26, 2025

A hyperspectral maize nitrogen content prediction model is proposed, integrating a dynamic spectral–spatiotemporal attention mechanism with graph neural network, the aim of enhancing accuracy and stability estimation. Across multiple experiments, proposed method achieved outstanding performance on test set, R2=0.93, RMSE 0.35, MAE 0.48, significantly outperforming comparative models including SVM, RF, ResNet, ViT. In experiments conducted across different growth stages, best was observed during grain-filling stage, where R2 reached 0.96. terms accuracy, recall, precision, exhibited an average improvement exceeding 15%, demonstrating strong adaptability to temporal variation generalization spatial conditions. These results provide robust technical support for large-scale, nondestructive monitoring in agricultural applications.

Language: Английский

Citations

0
Appropriate water and nitrogen supply regulates the dynamics of nitrogen translocation and thereby enhancing the accumulation of nitrogen in maize grains DOI Creative Commons
Tingrui Yang, Jinghua Zhao, Ming Hong

et al.

Agricultural Water Management, Journal Year: 2024, Volume and Issue: 306, P. 109160 - 109160

Published: Nov. 9, 2024

Language: Английский

Citations

2
Synergistic Effects of Irrigation and Nitrogen Fertilisation on Maize Photosynthetic Performance and Yield of Rainfed Systems in Drought‐Prone Environments DOI Open Access
Ya Huang, Fei Gao, Rayyan Khan

et al.

Journal of Agronomy and Crop Science, Journal Year: 2024, Volume and Issue: 210(6)

Published: Oct. 29, 2024

ABSTRACT Maize, a cereal crop of global significance, encounters cultivation challenges in the subtropical regions Guangxi, mainly due to variable rainfall and low soil fertility, exacerbating effects drought. This study evaluated irrigation nitrogen fertilisation on overcoming these improving maize growth yield. Between 2020 2021, split‐plot experiment was conducted. The main plots were assigned two treatments: irrigated rainfed. Within each plot, subplots treated with different levels (0, 150, 200, 250 300 kg ha −1 ). results showed that water regime significantly impacted several key factors, including net photosynthetic rate (Pn), stomatal conductance (Gs), transpiration (Tr), intercellular carbon dioxide concentration (Ci), photosynthetically active radiation (PAR), carbon‐metabolising enzymes total (TC) content accumulation. Under drought‐like rainfed conditions, application nitrogen, RN300 (rainfed ), IN250 (irrigated ) enhanced Pn (10.0%), Tr (3.17%), Ci (3.41%) Gs (2.6%). Additionally, PAR influenced by levels. IN250, capture ratio (Ca) increased (2.36%), while penetration (Pe) reflectance (Re) decreased 13.12% 46.36%, respectively, compared RN300. metabolism (sucrose phosphate synthase phosphoenolpyruvate carboxylase) TC higher under IN250; however, differences not statistically significant. Path analysis revealed thousand kernel weight had most significant impact yield both regimes. effect stronger path coefficient 0.647, 0.459 conditions. Correlation indicated plant height (0.938), stem diameter (0.906), ear (0.928) length (0.803) positively correlated In conclusion, exhibited superior performance suggests balanced management can effectively mitigate adverse impacts drought maize, optimising sustainably.

Language: Английский

Citations

1
Evaluation of gridded cropland phosphorus budget and use efficiency in China DOI

Sunam You,

Hao Shi,

Fei Lun

et al.

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 370, P. 122974 - 122974

Published: Oct. 23, 2024

Language: Английский

Citations

0
Effects of Water–Nitrogen Interaction on Sandy Soil, Physiology, and Morphology of Tall Fescue (Festuca arundinacea Schreb) Turf DOI Creative Commons

Wenjun Guo,

Wenchao Zhang, Liebao Han

et al.

Agriculture, Journal Year: 2024, Volume and Issue: 14(11), P. 1948 - 1948

Published: Oct. 31, 2024

The soil water and nitrogen (N) levels are the important factors affecting turfgrass growth. However, impact of water–N interaction on tall fescue (Festuca arundinacea Schreb) in terms N metabolism plant morphology remains uncertain. Therefore, objective this study was to investigate impacts different physiological morphological responses fescue. experiment designed with (N0, N2, N4 representing application rates 0, 2, 4 g m–2, respectively) irrigation [W1, W2, W3, W4, W5 field capacities (FWCs) 90~100%, 75~85%, 60~70%, 45~55%, 30~40%, respectively] treatments, relevant indexes content NH4+–N NO3−–N as well physiology were determined. results demonstrated significant changes contents (SWC) indexes, except for enzymes related metabolism, including nitrite reductase (NiR), glutamate dehydrogenase (GDH), synthetase (GOGAT). stress significantly enhanced use efficiencies (WUE NUE), NUE treatment. influenced SWC, content, excluding malondialdehyde, NiR, GOGAT, above- (AGB) below-ground biomass, resulting increased WUE NUE. a low rate effectively alleviated detrimental SWC glutamine activity. In conclusion, W2 N2 deemed more appropriate treatments low-maintenance measures turf. Among all N2W2 is recommended optimal treatment due its ability conserve resources while still ensuring high turf quality.

Language: Английский

Citations

0
Migration mechanisms of soil carbon and nitrogen element during the natural restoration process in coal mining subsidence areas DOI

Yantang Wang,

Chunming Hao,

Kaikai He

et al.

Chemistry and Ecology, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 25

Published: Nov. 15, 2024

Understanding the movement and alteration of carbon nitrogen elements in soil is crucial for addressing ecological restoration coal mining subsidence areas. However, migration process mechanisms these during natural remain unclear. This study analysed fluctuating variations formation TC TN content profiles at different times Initially, both contents decreased followed by an increase process. Soil compaction effects, variation C/N ratio, enzyme activity were considered as predominant factors controlling element cycles collapsed profiles. will provide valuable insights into understanding behind recovery while establishing a scientific basis

Language: Английский

Citations

0