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- W2095535523 abstract "The role of mycorrhizae in phosphorus nutrition of maize (Zea mays L.) is related to the fact that the P concentration in maize shoots at the four- to five-leaf stage affects final grain yield.In the early 1980s we observed greater early-season shoot-P concentration (mg g −1 ) and P absorption (mg plant −1 ) from a no-till compared to a conventional tillage system. Further studies established that the greater P absorption is due to a more effective arbuscular mycorrhizal (AM) symbiosis when the soil is not disturbed. The greater P absorption is largely a result of the undisrupted mycelium present in an undisturbed soil, rather than to increased colonization. This mycelium retains viability through extended periods in frozen soil. In the spring this mycelia network is able to acquire P from the soil and deliver it to the plant immediately upon becoming connected to a newly developing root system. Increased P absorption has not resulted in increased grain yield in field trials. Some additional factor limits yield with no-till maize preventing the advantage of early P absorption from being realized as yield. When maize follows a non-mycorrhizal crop such as canola (Brassica napus L.), mycorrhizal colonization is delayed, reducing early-season P absorption. Yield reductions may occur.In summary, AM mycorrhizae are involved in P nutrition of maize and an understanding of their functioning will assist us in modifying management practices to maximize economic returns through increased fertilizer efficiency. Key words: Maize, arbuscular mycorrhizae, phosphorus nutrition, tillage, canola" @default.
- W2095535523 created "2016-06-24" @default.
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- W2095535523 date "2000-01-01" @default.
- W2095535523 modified "2023-10-17" @default.
- W2095535523 title "Arbuscular mycorrhizae and the phosphorus nutrition of maize: A review of Guelph studies" @default.
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- W2095535523 doi "https://doi.org/10.4141/p98-130" @default.
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