中国农业科学 ›› 2009, Vol. 42 ›› Issue (10): 3467-3474 .doi: 10.3864/j.issn.0578-1752.2009.10.0011

• 耕作栽培·生理生化 • 上一篇    下一篇

施氮对蚕豆/玉米间作系统蚕豆农艺性状及结瘤特性的影响

李玉英,孙建好,李春杰,李 隆,程 序,张福锁

  

  1. (中国农业大学资源与环境学院)

  • 收稿日期:2009-01-15 修回日期:2009-05-15 出版日期:2009-10-10 发布日期:2009-10-10
  • 通讯作者: 李隆

Effects of Interspecific Interactions and Nitrogen Fertilization Rates on the Agoronmic and Nodulation Characteristics of Intercropped Faba Bean

LI Yu-ying, SUN Jian-hao, LI Chun-jie, LI Long, CHENG Xu, ZHANG Fu-suo
  

  1. (中国农业大学资源与环境学院)

  • Received:2009-01-15 Revised:2009-05-15 Online:2009-10-10 Published:2009-10-10
  • Contact: LI Long

摘要:

【目的】旨在探明施氮对蚕豆/玉米间作体系蚕豆农艺性状和结瘤特性的影响,为河西走廊灌区豆科/禾本科间作体系氮素管理和高产高效提供科学依据。【方法】于2006-2007年在甘肃省农科院白云试验站分别采用裂区设计和原位根系行分隔法设计了蚕豆/玉米间作体系的氮梯度试验和根系分隔微区试验,研究不同氮水平下蚕豆/玉米种间互作对蚕豆农艺性状和结瘤特性的影响。【结果】施氮对蚕豆地上部生长和产量性状均无显著影响,但显著地抑制了蚕豆结瘤,产生了“氮阻遏”效应,且随着施氮量增加和蚕豆生长,“氮阻遏”效应愈加明显。随着蚕豆与玉米两种作物生长发育,作物根系相互促进作用逐渐增强,显著地促进了根瘤发育,且产生了“减缓效应”,平均为14.4%;根系互作相对于无根系互作处理蚕豆结瘤平均增加10.2%。【结论】蚕豆/玉米种间根系相互作用促进了蚕豆结瘤,减缓了”氮阻遏”效应,显著提高了蚕豆产量性状而实现了蚕豆增产。

关键词: 蚕豆/玉米间作, 蚕豆, 生长参数, 结瘤特性, 根系分隔, 施氮

Abstract:

【Objective】 The objective of this paper is to investigate the dynamics of the agronomic traits and nodulation of faba bean intercropped with maize as affected by intercropping and N application rates, therefore to provide a scientific basis for the N nutrient management with maximizing grain yield and nutrient efficiency of legume/cereal intercropping system in Hexi Corridor of Gansu Province. 【Method】 The N gradient experiment and micro-plot root barrier experiment were conducted using split-plot design and row root barrier technique at Baiyun Experimental Station of Gansu Academy of Agricultural Sciences during 2006-2007, so as to study the effects of interspecific interactions and N application rates on the agronomic traits and nodulation of intercropped faba bean. 【Result】 N application rates had no significant effect on the above-ground growth and the parameters of yield traits of faba bean. However, the nodulation of faba bean was significantly inhibited by N fertilization and the inhibitory effect was increased with N fertilization rate increasing and faba bean growing. Interspecific facilitation on the nodulation of faba bean was increased with co-growth of both crops. Intercropping significantly enhanced the nodulation size of faba bean and alleviated “Nmin inhibitory effect” on nodulation, which the value was 14.4%. The nodulation size of faba bean with interspecific root interactions increased by 10.2%, compared to that without interspecific root interactions. 【Conclusion】 The interspecific root interactions between faba bean and maize significantly enhanced the nodulation and alleviated “the Nmin inhibitory effect”, and significantly increased the yield of intercropped faba bean.

Key words: faba bean/maize intercrop, faba bean, growth parameters, nodulation, N application rates