高阳,段爱旺,孙景生,陈金平,王和洲,刘战东.玉米大豆条带间作根系分布模式[J].干旱地区农业研究,2009,27(2):92~98
玉米大豆条带间作根系分布模式
Crop root distribution model in maize／soybean strip intercropping system
  
DOI：10.7606/j.issn.1000-7601.2009.02.16
中文关键词:  间作  玉米  大豆  根系
英文关键词:intercropping  maize  soybean  root
基金项目:国家自然科学基金资助项目(50679082)； 国家“863”高技术研究发展计划资助项目(2006AA100209)； 中央级公益性科研院所基本科研业务费专项基金(JBKY0032007018CAAS)； 商丘农田生态系统国家野外观测研究站开放基金
作者单位
高阳 Farmland Irrigation Research Institute Chinese Academy of Agricultural Sciences，Xinxiang，He’nan 453003，China 
段爱旺 Farmland Irrigation Research Institute Chinese Academy of Agricultural Sciences，Xinxiang，He’nan 453003，China 
孙景生 Farmland Irrigation Research Institute Chinese Academy of Agricultural Sciences，Xinxiang，He’nan 453003，China 
陈金平 Farmland Irrigation Research Institute Chinese Academy of Agricultural Sciences，Xinxiang，He’nan 453003，China 
王和洲 Farmland Irrigation Research Institute Chinese Academy of Agricultural Sciences，Xinxiang，He’nan 453003，China 
刘战东 Farmland Irrigation Research Institute Chinese Academy of Agricultural Sciences，Xinxiang，He’nan 453003，China 
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中文摘要:
      在土壤剖面上冲洗根系,观测玉米/大豆条带间作模式下根系的生长分布及动态变化规律;使用二次曲线和修正的Logistic函数拟合根系下扎深度和侧向伸展距离与播后天数(DAS)的关系;引入根系的相对侧向伸展距离(RLD)与相对深度(RD)两个概念,将根系下扎深度和侧向伸展距离归一化,利用高斯函数拟合RLD与RD的关系,建立根系分布函数。结果表明,该根系分布函数对玉米大豆间作模式下的根系生长分布状况有很好的模拟性。
英文摘要:
      Root growth dynamics in maize/soybean strip intercropping system were investigated through washing roots in soil profile, and root distribution model of the intercropping system was developed.The relationship between root depth and lateral extensional distance and DAS (days after sowing) were fitted with the quadratic curve equation and modified logistic function.Root depth and lateral extensional distance were normalized with the relative depth (RD) and lateral distance (RLD) .The relationship between RLD and RD was fitted with Gauss function.Root distribution could be obtained using the developed root distribution model with DAS.
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