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A Reduced Phosphorus Application Rate Using a Mycorrhizal Plant as the Preceding Crop Maintains Soybean Seeds’ Nutritional Quality
- Sha, Zhimin, Watanabe, Toshihiro, Chu, Qingnan, Oka, Norikuni, Osaki, Mitsuru, Shinano, Takuro
- Journal of agricultural and food chemistry 2018 v.67 no.1 pp. 32-42
- Helianthus annuus, crops, fertilizer rates, filling period, iron, manganese, mycorrhizal fungi, nutrients, nutritive value, phosphorus, phosphorus fertilizers, phosphorus pentoxide, seeds, soybeans
- We tested whether introducing an arbuscular mycorrhizal fungi (AMF)-host plant with a reduced P application rate could maintain soybean seeds’ nutrient quality. The dynamic variation of 14 nutrients was analyzed in source and sink organs during the seed-filling stage. The AMF-host and non-AMF-host plants, sunflower and mustard, were grown as preceding crops (PCs). Soybeans, the succeeding crops, were planted with three different phosphorus levels, namely, 0, 50, and 150 kg P₂O₅ ha–¹. The results showed that the AMF-host PC with a reduced P application rate maintained the seed’s yield and nutrients quality. During the seed-filling stage, the AMF-host PC with a reduced P application rate increased the uptake of most nutrients compared to the non-AMF-host PC, and improved the remobilization efficiency of all nutrients except Mn, Fe, and Se, compared to the optimal P application rate. These results could help improve the utilization efficiency of P fertilizers and protect soybeans’ nutritional value.