Study on the effectiveness and mechanism of a sustainable dual slow-release model to improve N utilization efficiency and reduce N pollution in black soil.

Autor: Wang G; College of Resources and Environment, Jilin Agricultural University/Key Laboratory of Sustainable Utilization of Soil Resources in Commodity Grain Base of Jilin Province, Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Changchun, Jilin 130118, China., Gou Z; College of Resources and Environment, Jilin Agricultural University/Key Laboratory of Sustainable Utilization of Soil Resources in Commodity Grain Base of Jilin Province, Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Changchun, Jilin 130118, China., Tian G; Jilin Woyijia Ecological Agriculture Co. LTD, Siping, Jilin 136400, China., Sima W; College of Resources and Environment, Jilin Agricultural University/Key Laboratory of Sustainable Utilization of Soil Resources in Commodity Grain Base of Jilin Province, Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Changchun, Jilin 130118, China., Zhou J; College of Resources and Environment, Jilin Agricultural University/Key Laboratory of Sustainable Utilization of Soil Resources in Commodity Grain Base of Jilin Province, Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Changchun, Jilin 130118, China., Bo Z; College of Resources and Environment, Jilin Agricultural University/Key Laboratory of Sustainable Utilization of Soil Resources in Commodity Grain Base of Jilin Province, Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Changchun, Jilin 130118, China., Zhang Z; College of Resources and Environment, Jilin Agricultural University/Key Laboratory of Sustainable Utilization of Soil Resources in Commodity Grain Base of Jilin Province, Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Changchun, Jilin 130118, China. Electronic address: zhangzhongqing@jlau.edu.cn., Gao Q; College of Resources and Environment, Jilin Agricultural University/Key Laboratory of Sustainable Utilization of Soil Resources in Commodity Grain Base of Jilin Province, Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Changchun, Jilin 130118, China. Electronic address: jlauzy2019@163.com.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2024 Jan 10; Vol. 907, pp. 168033. Date of Electronic Publication: 2023 Oct 26.
DOI: 10.1016/j.scitotenv.2023.168033
Abstrakt: Long-term intensive cultivation has led to serious N loss and low N fertilizer utilization efficiency (NUE) in black soil areas. The lost N is not only a waste of resources but also a serious pollution threat to the environment, leading to the decline in water quality and food safety and the greenhouse effect. In the present study, a stable dual slow-release model, CPCS-Urea, was prepared by in situ polymerization using nitrapyrin, urea and melamine-formaldehyde resin as raw materials. The effect of the dual slow-release model was systematically evaluated using two consecutive years of field experiments. Five treatments were established in the field experiment: no N fertilizer (N0), urea (N180), 1 % CPEC-Urea, 0.5 % CPCS-Urea, and 1 % CPCS-Urea. The results showed that the new dual slow-release CPCS-Urea model outperformed both the use of urea and the traditional slow-release CPEC-Urea model in reducing N losses and improving NUE. The application of CPCS-Urea reduced nitrate (NO 3 - ) leaching by 28.2 %-47.2 % and N 2 O emissions by 36.5 %-42.4 % and increased NUE by 20.7 %-28.5 % compared to urea application. The CPCS-Urea model modulated the activity of ammonia-oxidizing bacteria (AOB) and dissimilatory nitrate reduction to ammonium (DNRA) bacteria in soil, showing a significant decrease in AOB activity and an increase in DNRA activity. This results in a lower soil NO 3 - -N yield and a 53.1 %-72.0 % increase in NH 4 + -N content, providing sufficient N for the entire growth and development cycle of maize. In short, the dual slow-release CPCS-Urea model has great application prospects for promoting agricultural development in black soil areas.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023. Published by Elsevier B.V.)
Databáze: MEDLINE
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