Effects of Interactions between AM Fungi and Nitrogen in Soil on Biomass and N-P Uptake of Sorghum Plants

WANG Jian; ZHANG Haiou; YANG Chenxi; LI Juan

doi:10.19303/j.issn.1008-0384.2022.007.003

Volume 37 Issue 7

Jul. 2022

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Article Navigation > Fujian Journal of Agricultural Sciences > 2022 > 37(7): 833-840

WANG J, ZHANG H O, YANG C X, et al. Effects of Interactions between AM Fungi and Nitrogen in Soil on Biomass and N-P Uptake of Sorghum Plants [J]. Fujian Journal of Agricultural Sciences，2022，37（7）：833−840 doi: 10.19303/j.issn.1008-0384.2022.007.003

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WANG J, ZHANG H O, YANG C X, et al. Effects of Interactions between AM Fungi and Nitrogen in Soil on Biomass and N-P Uptake of Sorghum Plants [J]. Fujian Journal of Agricultural Sciences，2022，37（7）：833−840 doi: 10.19303/j.issn.1008-0384.2022.007.003

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Effects of Interactions between AM Fungi and Nitrogen in Soil on Biomass and N-P Uptake of Sorghum Plants

doi: 10.19303/j.issn.1008-0384.2022.007.003

WANG Jian^{1, 2
,},
ZHANG Haiou^{1, 2},
YANG Chenxi^{1, 2},
LI Juan^{1, 2
,
,}

1.
Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Nature and Resources, Xi’an, Shaanxi　710075, China
2.
Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi’an, Shaanxi　710075, China

Received Date: 2021-09-26
Rev Recd Date: 2021-12-19

Available Online: 2022-08-07

Publish Date: 2022-07-28

Abstract

Abstract

Objective Effects of the widely distributed, important plant growth and stress resistance regulating arbuscular mycorrhizal (AM) fungi on sorghum growth under varied nitrogen (N) deposition in soil were studied on the terrestrial ecosystem. Method Growth of Sorghum hicolor (L.) Mocrnch seedlings inoculated with either Glomus mosseae or inactivated G. mosseae (CK) in pots under varied N addition of 0, 200, 400, or 500 mg·kg^-1 (refer to as N0, N1, N2, and N3, respectively) in a greenhouse was monitored. Mycorrhizal colonization in rhizosphere soils was determined after two weeks, while the biomass, N, and P of the plants in 16 weeks of cultivation. Result ① The AM fungi inoculation significantly increased the mycorrhizal colonization on sorghum roots (P＜0.001) at a decreasing trend with increasing N addition. ② Both the aboveground and total biomasses of the sorghum plants grown under N0 were significantly enhanced by the presence of the AM fungi but inhibited by it under N3 (P＜0.05). ③ Similarly, AM fungi increased the N and P contents and N/P ratio in the plant tissues by N0 but did the opposite under either N2 or N3 (P＜0.05). However, under N2 the AM fungal inoculation exerted no significant effect on P content (P＞0.05). And ④ the mycorrhizal growth effect (MGR), mycorrhizal N-uptake effect (MNR), and mycorrhizal P-uptake effect (MPR) on sorghum changed from positive to negative gradually as the N addition increased. Conclusion Inoculating AM fungi on sorghum seedlings and adding N in soil interactively affected the biomass and N-P uptake of the plants significantly. Without N addition, the AM fungi enhanced the accumulation of biomass, N, and P, but N addition maximized the mycorrhizal effect at certain level. High levels of N in soil could be detrimental to the growth of AM fungi and altered the symbiosis.
- AM fungi,
- nitrogen deposition,
- Sorghum hicolor (L.) Mocrnch,
- biomass,
- N and P uptake,
- mycorrhizal response

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References(34)

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