Vertical Distribution of Soluble Organic Nitrogen Composition in Paddy Soils: Effects of Chinese Milk Vetch Application Rates DOI Creative Commons
H. J. Yang,

Le Xiang,

Fenghua Ding

et al.

Agronomy, Journal Year: 2025, Volume and Issue: 15(4), P. 833 - 833

Published: March 27, 2025

Soluble organic nitrogen (SON) plays a critical role in soil cycling, yet the effects of Chinese milk vetch (CMV) application on composition SON within paddy profiles remains poorly understood. This study aimed to investigate varying CMV rates and vertical distribution soils, evaluating its potential implications for fertility leaching. A three-year field experiment was conducted subtropical rice cultivation system, employing four (0, 15,000, 30,000, 45,000 kg ha−1). Soil samples were collected from three depth layers (0–20 cm, 20–40 40–60 cm) at maturity stage, components, including free amino acid (FAA-N), amide (A-N), soluble protein (SP-N), analyzed. The results demonstrated that significantly enhanced content, particularly topsoil cm), with 49.87% increase under ha−1 treatment. constituted over 50% total 0–60 cm layer, FAA-N, A-N, SP-N identified as predominant components. facilitated accumulation small-molecular (e.g., FAA-N A-N) deeper layers, content increasing by 79.13% layer A-N 64.85% In contrast, high-molecular-weight SP-N) primarily accumulated due stronger adsorption, while small-molecular-weight exhibited greater mobility, thereby elevating risk These findings highlight need optimized balance environmental sustainability cropping systems.

Language: Английский

Vertical Distribution of Soluble Organic Nitrogen Composition in Paddy Soils: Effects of Chinese Milk Vetch Application Rates DOI Creative Commons
H. J. Yang,

Le Xiang,

Fenghua Ding

et al.

Agronomy, Journal Year: 2025, Volume and Issue: 15(4), P. 833 - 833

Published: March 27, 2025

Soluble organic nitrogen (SON) plays a critical role in soil cycling, yet the effects of Chinese milk vetch (CMV) application on composition SON within paddy profiles remains poorly understood. This study aimed to investigate varying CMV rates and vertical distribution soils, evaluating its potential implications for fertility leaching. A three-year field experiment was conducted subtropical rice cultivation system, employing four (0, 15,000, 30,000, 45,000 kg ha−1). Soil samples were collected from three depth layers (0–20 cm, 20–40 40–60 cm) at maturity stage, components, including free amino acid (FAA-N), amide (A-N), soluble protein (SP-N), analyzed. The results demonstrated that significantly enhanced content, particularly topsoil cm), with 49.87% increase under ha−1 treatment. constituted over 50% total 0–60 cm layer, FAA-N, A-N, SP-N identified as predominant components. facilitated accumulation small-molecular (e.g., FAA-N A-N) deeper layers, content increasing by 79.13% layer A-N 64.85% In contrast, high-molecular-weight SP-N) primarily accumulated due stronger adsorption, while small-molecular-weight exhibited greater mobility, thereby elevating risk These findings highlight need optimized balance environmental sustainability cropping systems.

Language: Английский

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