Effects of different fertilization patterns on the dietary composition of Procambarus clarkii in a rice-crayfish coculture system

Sun, Xinjia; Wang, Haolin; Wang, Feijie; Zhao, Yue; Wang, Haiyan; Zhu, Jianqiang; Wei, Shudong; Chen, Hui

doi:10.1016/j.aqrep.2023.101801

Cited by 5 publications

(1 citation statement)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The activity of crayfish enhances soil structure [20] by increasing porosity. However, residual diets, manure waste, and water movement from crayfish feeding may result in excessive nutrient accumulation [21], impacting DOM structure and composition, potentially altering soil fertility and properties over time. Further studies are needed to understand the impact of this aquaculture method on soil fluorescent DOM comprehensively.…”

Section: Introductionmentioning

confidence: 99%

Variation in the Content and Fluorescence Composition of Dissolved Organic Matter in Chinese Different-Term Rice–Crayfish Integrated Systems

Liu,

Huang,

Chen

et al. 2024

Sustainability

View full text Add to dashboard Cite

This study examines the fluorescence characteristics of dissolved organic matter (DOM) in soils from different periods of rice–crayfish integrated systems (RCISs) in China. Utilizing three-dimensional excitation–emission matrix (3D-EEM) fluorescence spectroscopy, the study investigated the hydrophobicity, molecular weight distributions, and fluorescence properties of DOM in 2-, 5-, and 7-year RCIS operations, with rice monoculture (RM) serving as a control. The findings indicate that in the initial 2 years of an RCIS, factors such as rice straw deposition, root exudates, and crayfish excretions increase dissolved organic carbon (DOC) release and alter DOM composition, increasing the humic acid content in the soil. As the system matures at 5 years, improvements in soil structure and microbial activity lead to the breakdown of high-molecular-weight humic substances and a rise in small-molecular-weight amino acids. By the 7-year mark, as the aquatic ecosystem stabilizes, there is an increase in humic substances and the humification index in the soil DOM. These variations in DOM properties are essential for understanding the effects of integrated farming systems on soil quality and sustainability.

show abstract

Section: Introductionmentioning

confidence: 99%