Biological N fixation but not mineral N fertilization enhances the accumulation of N in peanut soil in maize/peanut intercropping system
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Author
Zhao, Fengyan
Sun, Zhanxiang
Feng, Liangshan
Zjang, Yongyong
Feng, Chen
Bai, Wei
Zheng, Jiaming
Zhang, Zhe
Yang, Ning
Cai, Qian
Xiang, Wuyan
Li, Hui
Jiang, Yong
Publication date
2022-09-06ISSN
2666-1543
Abstract
Legume/cereal intercropping has the potential to maximize the use of resources to raise yields due to enhanced nitrogen (N) fixation by legume root nodules, while high N fertilization may inhibit the nodulation of legume. However, whether legume/cereal intercropping can promote the accumulation of soil N storage with N fertilization and its underlying mechanism are less clear. Here, we evaluated the long-term (5 years) effects of maize/peanut intercropping and mineral N fertilization on peanut soil total N content and soil N cycling functional genes. The experiment includes two planting patterns (peanut maize intercropping and peanut monocropping) with three N fertilization rates (0, 150, and 300 kg N ha−1). Intercropping increased soil total N content (STN) by average 18.2%, and the positive effect of intercropping on STN decreased with N application rate. Highest N application decreased the nodule fresh weight (NFW) by 64.3% and 46.0% in intercropping and monocropping system, respectively. However, intercropping has no effect on NFW. Intercropping increased the nifH gene abundance by average 26.5%. SEM analysis indicated that NFW and nifH gene abundance combined can explain 46% of the variance of STN. Our results indicate that biological N fixation but not mineral N fertilization enhances the accumulation of N in soil planted with peanut in maize/peanut intercropping system.
Document Type
Article
Document version
Published version
Language
English
Subject (CDU)
633 - Field crops and their production
Pages
4
Publisher
Elsevier
Is part of
Journal of Agriculture and Food Research
Citation
Zhao, Fengyan, Zhanxiang Sun, Liangshan Feng, Yongyong Zhang, Chen Feng, Wei Bai, and Jiaming Zheng et al. 2022. "Biological N Fixation But Not Mineral N Fertilization Enhances The Accumulation Of N In Peanut Soil In Maize/Peanut Intercropping System". Journal Of Agriculture And Food Research 10: 100365. doi:10.1016/j.jafr.2022.100365.
Grant agreement number
EC/H2020/727217/EU/Redesigning European cropping systems based on species MIXtures/ReMIX
Program
Protecció Vegetal Sostenible
This item appears in the following Collection(s)
- ARTICLES CIENTÍFICS [2635]
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Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by-nc-nd/4.0/