We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
稻虾共作水域沉积物有机磷农药残留特征 及其对磷循环驱动机制.
- Authors
瞿梦洁; 韩玉成; 万智鹏; 谭艳; 安珈奇; 梅运军; 刘广龙
- Abstract
To investigate the mechanisms through which organophosphorus pesticides drive the phosphorus cycle in rice–crayfish water, we used a combination of field sampling and indoor analysis to determine the organophosphorus pesticide contents, microbial community structure, and phosphorus cycle functional gene abundance in sediments, and we analyzed the relationship between organophosphorus pesticides and functional phosphorus-cycle genes using redundancy analysis (RDA) and Spearman correlation test,and that the highest detection rates were 97.22% for dimethoate, 22.22% for dichlorvos, 2.78% for parathion-methyl; we did not detect malathion or chlorpyrifos was not detected in the sediment. During the dry and wet periods, the sediment concentrations reached 1.42 mg·kg-1 and 0.46 mg·kg-1 for dimethoate and 1.37 mg·kg-1 and 0.05 mg·kg-1 for dichlorvos, respectively. In all sediments, the most important phosphorus cycling processes were as follows:the ppx gene was involved in the hydrolysis of polyphosphate by Proteobacteria and Omnitrophicaeota, the phoD gene was involved in organophosphorus mineralization, and the phnK gene was involved in phosphate use by Gemmatimonadetes. Organophosphorus pesticides did not affect the most important phosphorus cycling processes, but an increase in the concentration of dimethoate significantly increased the expression of cphy (cysteine phosphatase phytase) genes (P<0.01) . An increase in the concentration of dichlorvos significantly decreased the expressions of pqqC (pyrroloquinoline-quinone synthase) and bpp (β-propeller phytase-propeller phytase) genes (P<0.05) . Therefore, in the sediments of rice – crayfish water, organophosphorus pesticides dimethoate and dichlorvos affected the phosphorus cycling process mainly by altering inorganic phosphorus solubilization and phytate mineralization.
- Subjects
ORGANOPHOSPHORUS pesticides; METHYL parathion; DIMETHOATE; DICHLORVOS; RANK correlation (Statistics); MALATHION
- Publication
Journal of Agro-Environment Science, 2023, Vol 42, Issue 2, p434
- ISSN
1672-2043
- Publication type
Article
- DOI
10.11654/jaes.2022-0607