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How Raised Beds and Fe-Chelate Affect Soybean Iron Deficiency Chlorosis and Yield
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作者 Lucas C. Holmes Hans J. Kandel +1 位作者 Grant H. Mehring Peder K. Schmitz 《Agricultural Sciences》 2021年第7期755-768,共14页
Water-logging and the inability to take up sufficient iron (Fe), causing iron deficiency chlorosis (IDC) in soybean (<em>Glycine max</em>, L. Merr.), can be major yield reducing factors in certain soils in... Water-logging and the inability to take up sufficient iron (Fe), causing iron deficiency chlorosis (IDC) in soybean (<em>Glycine max</em>, L. Merr.), can be major yield reducing factors in certain soils in the northern USA and Manitoba, Canada, soybean growing regions. The objective of this research was to evaluate soybean IDC, biomass production, and yield with seeding on raised beds and seed application of the Fe-chelate compound ortho-ortho-Fe-EDDHA. In six environments, soybean were seeded on raised beds and conventionally prepared seedbeds (flat) and with a factorial arrangement of five cultivars (within adapted maturity group 0.1 to 0.9 and variable IDC tolerance) and seed applied Fe-EDDHA using rates of 0 kg<span style="white-space:nowrap;"><span style="white-space:nowrap;">&#183;</span></span>ha<sup><span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8722;</span></span>1</sup> and 3.36 kg<span style="white-space:nowrap;"><span style="white-space:nowrap;">&#183;</span></span>ha<sup><span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8722;</span></span>1</sup>. There were no significant interactions between the factors tested. The plant population was 27% higher on the raised beds compared with flat, and yield was 6.3% higher (2893 kg<span style="white-space:nowrap;"><span style="white-space:nowrap;">&#183;</span></span>ha<sup><span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8722;</span></span>1</sup> vs. 2722 kg<span style="white-space:nowrap;"><span style="white-space:nowrap;">&#183;</span></span>ha<sup><span style="white-space:nowrap;"><span style="white-space:nowrap;">&#8722;</span></span>1</sup>). Total dry plant biomass on raised beds was 9.8% greater compared with flat. The plant population with seed applied Fe-EDDHA was 10.6% lower compared with no application. However, the IDC score was significantly lower 2.2 vs 2.4 (1 = green, 5 = dead) for Fe-EDDHA seed application. Yield and plant biomass were not significantly different between Fe treatments. Raised beds offer an opportunity for soybean growers to reduce the negative influence of excessive water. Further research is needed to determine the long-term effect of raised beds on plant development, IDC expression, and yield. The application of Fe-EDDHA remains a partial solution and should therefore be combined with other methods to reduce IDC. Further research should study other Fe-EDDHA application rates and methods. 展开更多
关键词 SOYBEAN Raised Beds Iron Deficiency Chlorosis fe-chelate
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