Effects of nitrogen on winter wheat regrowth and grain yield after defoliation at tillering

摘要：

　　In dual-purpose winter wheat production systems, fall growth is grazed after freeze-up in Gansu, China.This greenhouse experiment investigated the response of winter wheat c.v.Longyu2 to five rates of N (0.0, 0.1, 0.2, 0.3 and 0.4 g N / kg soil) after a simulated grazing event of clipping at the 5 tiller stage of growth.Our results indicate that additional N is required to achieve adequate regrowth after clipping, especially from the elongation stage until maturity.Grain yield and spikes plant-1 for the 0.1 and 0.2 g N kg-1 soil rate were in the highest groupings.Clipping without the addition of N under greenhouse conditions will result in a significant yield loss (up to an 80%) in grazing-purpose winter wheat.

关键词： nitrogen winter wheat grazing-purpose

作者: Dandan Wang Yuying Shen

作者单位: State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology,Lanzhou University, Lanzhou 730020

会议类型: 国际会议

会议名称: The 5th China-Japan-Korea Grassland Conference(第五届中-日-韩国际草地会议)

会议地点: 长春

会议语种:英文

页码: 30-31

在线出版日期: 2014-08-20（万方平台首次上网日期，不代表论文的发表时间）