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Straw incorporation and nitrogen reduction effect on the uptake and use efficiency of nitrogen as well as soil CO(2) emission of relay strip intercropped soybean

Intercropping can increase crop N uptake and reduce carbon emissions. However, the effects of straw incorporation and N reduction on N use and carbon emissions in intercropping are still unclear. We explored the mechanism of N uptake, N use efficiency, and CO(2) emissions in the wheat-maize-soybean...

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Autores principales: Zheng, Benchuan, Chen, Ping, Du, Qing, Yang, Huan, Luo, Kai, Wang, Xiaochun, Yang, Feng, Yong, Taiwen, Yang, Wenyu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9928161/
https://www.ncbi.nlm.nih.gov/pubmed/36798805
http://dx.doi.org/10.3389/fpls.2022.1036170
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author Zheng, Benchuan
Chen, Ping
Du, Qing
Yang, Huan
Luo, Kai
Wang, Xiaochun
Yang, Feng
Yong, Taiwen
Yang, Wenyu
author_facet Zheng, Benchuan
Chen, Ping
Du, Qing
Yang, Huan
Luo, Kai
Wang, Xiaochun
Yang, Feng
Yong, Taiwen
Yang, Wenyu
author_sort Zheng, Benchuan
collection PubMed
description Intercropping can increase crop N uptake and reduce carbon emissions. However, the effects of straw incorporation and N reduction on N use and carbon emissions in intercropping are still unclear. We explored the mechanism of N uptake, N use efficiency, and CO(2) emissions in the wheat-maize-soybean relay strip intercropping system. A two-year field experiment was conducted with two straw managements, i.e., wheat straw incorporation (SI) and straw removal (SR), and four N application levels of soybean, i.e., 60 (N60), 30 (N30), 15 (N15), and 0 kg N ha(-1) (N0). We assessed soil properties, CO(2) emissions, and characteristics of roots, nodules, and aboveground N uptake of intercropped soybean. Results showed that geometry mean diameter of aggregate, soil porosity, soil total N, and soil urease activity were notably greater in SI than in SR. N input reduced from N60 to N30 did not significantly affect the soil total N content and urease activity in SI. The root length, root surface area, root volume, root biomass, root bleeding intensity, and inorganic N content of bleeding sap were greater in SI than in SR. In the SI, although the root length and surface area peaked at N60, the root biomass and inorganic N content of bleeding sap were insignificant between N60 and N30. The nodule number, nodule dry weight, nodule nitrogenase activity, and nodule nitrogen fixation potential in SI were notably increased compared with SR. The nodule nitrogen fixation potential in SI notably increased with the decrease of N input at the R3 stage, but it peaked in N30 at the R5 stage. On average, the aboveground N uptake and nitrogen recovery efficiency (RE) was notably higher by 43.7% and 76.8% in SI than in SR. SI+N30 achieved the greatest aboveground N uptake and RE. The CO(2) emission and accumulated CO(2) emission were notably greater in SI than in SR, and the accumulated CO(2) emission of SI was the lowest with N30 input. In conclusion, SI+N30 promoted N uptake and utilization efficiency with reduced CO(2) emissions during the soybean cropping season. It provides a potential strategy for sustainable agricultural development in intercropping systems.
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spelling pubmed-99281612023-02-15 Straw incorporation and nitrogen reduction effect on the uptake and use efficiency of nitrogen as well as soil CO(2) emission of relay strip intercropped soybean Zheng, Benchuan Chen, Ping Du, Qing Yang, Huan Luo, Kai Wang, Xiaochun Yang, Feng Yong, Taiwen Yang, Wenyu Front Plant Sci Plant Science Intercropping can increase crop N uptake and reduce carbon emissions. However, the effects of straw incorporation and N reduction on N use and carbon emissions in intercropping are still unclear. We explored the mechanism of N uptake, N use efficiency, and CO(2) emissions in the wheat-maize-soybean relay strip intercropping system. A two-year field experiment was conducted with two straw managements, i.e., wheat straw incorporation (SI) and straw removal (SR), and four N application levels of soybean, i.e., 60 (N60), 30 (N30), 15 (N15), and 0 kg N ha(-1) (N0). We assessed soil properties, CO(2) emissions, and characteristics of roots, nodules, and aboveground N uptake of intercropped soybean. Results showed that geometry mean diameter of aggregate, soil porosity, soil total N, and soil urease activity were notably greater in SI than in SR. N input reduced from N60 to N30 did not significantly affect the soil total N content and urease activity in SI. The root length, root surface area, root volume, root biomass, root bleeding intensity, and inorganic N content of bleeding sap were greater in SI than in SR. In the SI, although the root length and surface area peaked at N60, the root biomass and inorganic N content of bleeding sap were insignificant between N60 and N30. The nodule number, nodule dry weight, nodule nitrogenase activity, and nodule nitrogen fixation potential in SI were notably increased compared with SR. The nodule nitrogen fixation potential in SI notably increased with the decrease of N input at the R3 stage, but it peaked in N30 at the R5 stage. On average, the aboveground N uptake and nitrogen recovery efficiency (RE) was notably higher by 43.7% and 76.8% in SI than in SR. SI+N30 achieved the greatest aboveground N uptake and RE. The CO(2) emission and accumulated CO(2) emission were notably greater in SI than in SR, and the accumulated CO(2) emission of SI was the lowest with N30 input. In conclusion, SI+N30 promoted N uptake and utilization efficiency with reduced CO(2) emissions during the soybean cropping season. It provides a potential strategy for sustainable agricultural development in intercropping systems. Frontiers Media S.A. 2022-11-09 /pmc/articles/PMC9928161/ /pubmed/36798805 http://dx.doi.org/10.3389/fpls.2022.1036170 Text en Copyright © 2022 Zheng, Chen, Du, Yang, Luo, Wang, Yang, Yong and Yang https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Zheng, Benchuan
Chen, Ping
Du, Qing
Yang, Huan
Luo, Kai
Wang, Xiaochun
Yang, Feng
Yong, Taiwen
Yang, Wenyu
Straw incorporation and nitrogen reduction effect on the uptake and use efficiency of nitrogen as well as soil CO(2) emission of relay strip intercropped soybean
title Straw incorporation and nitrogen reduction effect on the uptake and use efficiency of nitrogen as well as soil CO(2) emission of relay strip intercropped soybean
title_full Straw incorporation and nitrogen reduction effect on the uptake and use efficiency of nitrogen as well as soil CO(2) emission of relay strip intercropped soybean
title_fullStr Straw incorporation and nitrogen reduction effect on the uptake and use efficiency of nitrogen as well as soil CO(2) emission of relay strip intercropped soybean
title_full_unstemmed Straw incorporation and nitrogen reduction effect on the uptake and use efficiency of nitrogen as well as soil CO(2) emission of relay strip intercropped soybean
title_short Straw incorporation and nitrogen reduction effect on the uptake and use efficiency of nitrogen as well as soil CO(2) emission of relay strip intercropped soybean
title_sort straw incorporation and nitrogen reduction effect on the uptake and use efficiency of nitrogen as well as soil co(2) emission of relay strip intercropped soybean
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9928161/
https://www.ncbi.nlm.nih.gov/pubmed/36798805
http://dx.doi.org/10.3389/fpls.2022.1036170
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