Biological N fixation but not mineral N fertilization enhances the accumulation of N in peanut soil in maize/peanut intercropping system
Visualitza/Obre
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
Data de publicació
2022-09-06ISSN
2666-1543
Resum
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.
Tipus de document
Article
Versió del document
Versió publicada
Llengua
Anglès
Matèries (CDU)
633 - Cultius i produccions
Pàgines
4
Publicat per
Elsevier
Publicat a
Journal of Agriculture and Food Research
Citació
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 de l'acord de la subvenció
EC/H2020/727217/EU/Redesigning European cropping systems based on species MIXtures/ReMIX
Programa
Protecció Vegetal Sostenible
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