Do Corn Hybrid Traits Affect Nitrogen Use Efficiency

2011

  • Carrie A.M. Laboski
  • Todd Andraski
  • Joe Lauer
  • UW Madison, Soil Science
Project Media

The number of acres planted to corn rootworm (Diabrotica spp.) (CRW) resistant corn (Zea mays L.) hybrids have increased in recent years. The CRW resistant corn hybrids may have a greater yield potential because of reduced stress from CRW larval feeding resulting in larger root systems. Many agronomists believe higher N rates are needed to achieve the greater yield potential associated with these hybrids. However, larger root systems of CRW resistant hybrids could result in greater N use efficiency and perhaps a reduced N fertilizer need compared to non-CRW resistant hybrids.