Corn Nitrogen Fertilization Requirement and Corn Soybean Productivity with a Rye Cover Crop.
- Authors
- Pantoja Guam?n, Jos? Luis
- Format
- Article
- Status
- publishedVersion
- Description
winter rye (Secale cerealel.) cover crop (rcc) has potential to reduce no 3?n loss from corn (Zea maysl.) and soybean [Glycine max (l.) Merr.] fields. However, rcc effects on annual crop productivity and corn optimal N fertilization requirement are unclear. The objectives were to evaluate corn and soybean yield response to rcc and corn optimal n rate. Treatments were no-rcc and rcc with six fertilizer n rates (0?225 kg n ha-1) applied to corn in a no-till corn?soybean (cs) rotation at four iowa sites in 2009 through 2011. The rcc biomass and n uptake was low, with a maximum of 1280 kg dry matter (dM) ha-1 and 26 kg n ha-1 respectively. in the no-n control, the rcc reduced soil profile no 3?n by 15 kg n ha-1 only at time of rcc control before corn planting. corn canopy sensing, plant height, and plant population indicated more N stress, reduced plant stand, and slower growth with rcc. The rcc reduced corn grain yield by 6% at the economic optimum N rate (eonr). The eonr was the same with no-rcc and rcc, but plant N uptake efficiency (Pue) was reduced at low N rates with rcc, but not above the eonr. soybean yield was not affected by rcc. results indicate n fertilization rate should be the same with or without rcc. improvement in rcc systems and management could make rcc a more viable practice within notill corn and soybean production.
Universidad De Las Fuerzas Armadas
http://www.scopus.com/record/display.uri?eid=2-s2.0-84943427767&origin=resultslist&sort=plf-f&src=s&st1=
- Publication Year
- 2015
- Language
- eng
- Topic
- FERTILIZATION
NITROGEN
CORN
SOYBEAN
- Repository
- Repositorio SENESCYT
- Rights
- openAccess
- License
- openAccess