Biological N fixation but not mineral N fertilization enhances the accumulation of N in peanut soil in maize/peanut intercropping system
Ver/Abrir
Autor/a
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
Fecha de publicación
2022-09-06ISSN
2666-1543
Resumen
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.
Tipo de documento
Artículo
Versión del documento
Versión publicada
Lengua
English
Materias (CDU)
633 - Cultivos y producciones
Páginas
4
Publicado por
Elsevier
Publicado en
Journal of Agriculture and Food Research
Citación
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.
Número del acuerdo de la subvención
EC/H2020/727217/EU/Redesigning European cropping systems based on species MIXtures/ReMIX
Program
Protecció Vegetal Sostenible
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