Effect of green manuring on the yield of sweet corn


Turgut İ. , Bilgili U. , Duman A., Acikgoz E.

AGRONOMY FOR SUSTAINABLE DEVELOPMENT, vol.25, no.4, pp.433-438, 2005 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 25 Issue: 4
  • Publication Date: 2005
  • Doi Number: 10.1051/agro:2005044
  • Title of Journal : AGRONOMY FOR SUSTAINABLE DEVELOPMENT
  • Page Numbers: pp.433-438
  • Keywords: sweet corn, Zea mays var. saccharata, green manuring, field pea, common vetch, faba bean, nitrogen fertilization, SOIL-NITROGEN, SEEDING RATE, COVER CROPS, ZEA-MAYS, PRODUCTIVITY

Abstract

Experiments were conducted on a clay soil to assess the effects of green manuring of three annual legumes and nitrogen fertilization on sweet corn (Zea mays var. saccharata Sturt.), during three growing seasons (2001 - 2003). The green manuring legumes were field pea (Pisum sativum L.), common vetch (Vicia sativa L.) and faba bean (Vicia faba L.) N fertilization ranged from 0 to 360 kg ha(-1). On a three-year average, field pea (3 065 kg ha(-1)) and common vetch (2 647 kg ha(-1)) consistently had higher aboveground dry matter yields than faba bean (1307 kg ha(-1)). Field pea and common vetch had N contents of 68.7 and 54.0 kg ha(-1), respectively, in aboveground dry matter in the spring. The average N content of faba bean was only 30.0 kg ha(-1). Green manuring treatments and N fertilization had different effects on yield components of sweet corn. Average ear yields of corn were significantly greater in plots receiving green manuring (15 127 kg ha(-1)) than those without green manuring (13 826 kg ha(-1)). The ear yields following green manuring legumes were 33-39% higher compared with fallow under unfertilized conditions. Ear yield of corn generally increased with an increasing rate of N fertilizer. Although the combined use of green manuring and 240 and 360 kg ha(-1) N fertilization produced high ear yields, there were no statistically significant increases beyond 120 kg ha(-1) N.