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- Title
Quantification of Soybean Leaf Senescence and Maturation as Impacted by Soil‐ and Foliar‐Applied Nitrogen.
- Authors
Craft, J.C.; Lindsey, L.E.; Barker, D.J.; Lindsey, A.J.
- Abstract
Core Ideas: Soybean leaf senescence and maturation, yield, and seed quality were minimally impacted by soil and foliar‐applied nitrogen.Cultivar differences in maturation, yield, and seed quality were evident.The use of NDVI is an effective technique to describe soybean leaf senescence during maturation. Ohio producers often question whether fertilizing soybeans [Glycine max (L.) Merr.] with nitrogen (N) will increase yield. Foliar‐ and soil‐applied N have been evaluated throughout the Midwestern US, but few studies have compared the response of commercially available foliar N applications to soil‐applied N within the same environments. Additionally, there is limited information on the impacts of N application on soybean maturation and leaf senescence. The objectives of this study were to: (i) evaluate the effect of various rates of soil‐ and foliar‐applied N at different growth stages on the maturation of soybeans; and (ii) quantify the effect on soybean yield and quality (protein and oil) of soil and foliar N application. A field study was conducted in 2017 at two Ohio locations using a randomized complete block design with full factorial of soybean cultivar (one Maturity Group II and one Maturity Group III) and N application treatment (unfertilized control and four N applications varying in source, rate, and timing). The maturity date, yield, and quality varied among cultivars. Leaf senescence was impacted by weather conditions to a greater extent than N application. Maturity date was impacted by N application, but all treatments matured within 1 day of one another and were similar to the untreated control. The N treatments had minimal effects on leaf senescence, yield, seed protein, and seed oil. Future studies should focus on expanding these results in additional environments and with more N application treatments.
- Subjects
SOYBEAN yield; SEED quality; NITROGEN in agriculture; SEED proteins; CROP development
- Publication
Crop, Forage & Turfgrass Management, 2019, Vol 5, Issue 1, p1
- ISSN
2374-3832
- Publication type
Article
- DOI
10.2134/cftm2018.07.0051