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棉花学报 ›› 2011, Vol. 23 ›› Issue (1): 39-43.

• 研究与进展 • 上一篇    下一篇

应用根系生态位指数研究不同灌溉量棉花根系分布特征

刘凤山1,2,周智彬1*,陈秀龙1,2,甘永德1,2   

  1. 1. 中国科学院新疆生态与地理研究所,乌鲁木齐 830011;2. 中国科学院研究生院,北京100039
  • 收稿日期:2010-03-26 出版日期:2011-01-15 发布日期:2011-01-15
  • 通讯作者: zzb4181@sina.com
  • 作者简介:刘凤山(1986-),男,硕士,lhkql@sina.com
  • 基金资助:

    国家重点基础研究发展计划 (2009CB421302),中科院“西部之光”人才计划“联合学者”(HXZ200801),新疆维吾尔自治区科技攻关重大专项(200731137-3)

Using RENI to Study the Distribution Characteristics of Cotton Roots in Different Amounts of Drip Irrigation under Film

LIU Feng-shan1,2, ZHOU Zhi-bin1*, CHEN Xiu-long1,2, GAN Yong-de1,2   

  1. 1.  Xinjiang Institute of Geology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; 2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China
  • Received:2010-03-26 Online:2011-01-15 Published:2011-01-15
  • Contact: zzb4181@sina.com

摘要: 利用根系生态位指数(root ecological niche index , RENI)研究膜下滴灌不同灌溉量下棉花根系分布特征,并将RENI与根系各参数(根干重、根长、根体积、根表面积)相比较,为描述根系分布提供更准确的参数。试验结果表明:(1)RENI与根系各参数有良好的相关性(r2>95%),可以反映棉花根系的分布。灌溉量较少情况下,根体积对RENI的贡献率最大,根干重贡献率最小;充分灌溉条件下,根体积对RENI的贡献率最小,根干重最大。(2)RENI在土壤中呈偏正态分布,0~40 cm土层的RENI占总RENI的86.8%。(3)膜间裸地的根系分布主要受棉花生物学因素的影响,距离棉株越近,根系分布越多。

关键词: 生态位指数; 膜下滴灌; 根系分布; 棉花; 灌溉量

Abstract: The cotton root distribution characteristics under different amounts of drip irrigation was studied using root ecological niche index(RENI) which was compared with root parameters(root length, root dry weight, root volume, root surface area) ahead. And the results surely will be contributed to describing root distribution traits and root research methodology. The results showed: (1) RENI was well correlated with other root parameters and so can reflect root distribution characteristics. The contribution rate of root dry weight to RENI was of maximum under sufficient irrigation, and was of minimum under insufficient irrigation. However, root volume was the least influence factor of RENI under sufficient irrigation, and was the most important influence factor under insufficient irrigation. (2)Shown as skewed normal distribution, the RENI of cotton in the upper layer  soil above 40 cm depth accounted for 86.8% of the total RENI. (3) Roots developed in film-uncovered land were centrally impacted by the distance to the cotton plant,i.e., the closer of the distance,the higher of the RENI.

Key words: RENI; drip irrigation under film; root distribution; cotton; irrigation amount

中图分类号: 
  • S562.07