主办单位：中国气象局沈阳大气环境研究所
国际刊号：ISSN 1673-503X
国内刊号：CN 21-1531/P
气象与环境学报

气象与环境学报 ›› 2014, Vol. 30 ›› Issue (5): 83-89.doi:

• 论文 • 上一篇    下一篇

华北平原冬小麦根系在土壤中的分布研究

廖荣伟1 刘晶淼2,3 白月明2 安顺清2 梁宏2 卢建立2,4 乐章燕5 曹玉静6   

  1. 1. 国家气象信息中心，北京 100081；2. 中国气象科学研究院，北京 100081；3. 中国气象局沈阳大气环境研究所，辽宁 沈阳 110166；4. 河北省气象局，河北 石家庄 050021；5. 廊坊市气象局，河北 廊坊 065000；6. 中国气象局资产中心，北京 100081
  • 出版日期:2014-11-01 发布日期:2014-11-01

Spatial distribution of winter wheat root in soil under field condition in North China plain

LIAO Rong-wei1 LIU Jing-miao2,3 BAI Yue-ming2 AN Shun-qing2 LIANG Hong2 LU Jian-li2,4 LE Zhang-yan5 CAO Yu-jing6   

  1. 1. National Meteorological Information Center, Beijing 100081, China; 2. Chinese Academy of Meteorological Sciences, Beijing 100081, China; 3. Shenyang Institute of Atmospheric Environment, China Meteorlogical Administration, Shenyang 110016, China; 4. Meteorological Service of Hebei Province, Shijiazhuang 050021, China; 5. Langfang Meteorological Service, Langfang 065000, China; 6. Engineering Consulting Center, China Meteorlogical Adminstration, Beijing 100081, China
  • Online:2014-11-01 Published:2014-11-01

PDF (PC)

1964

被引次数

9

摘要：

小麦根系在土壤中的分布是准确量化植被与气候相互作用不可缺少的参数，也是小麦生产的科学管理和节水农业发展的重要科学依据。利用中国气象局固城生态环境与农业气象试验站大型根系观测系统，观测冬小麦“济麦-22”的根系参数，对根长、根长密度、根重密度和根系粗度在土壤中的垂直分布进行分析。结果表明：垂直方向上，冬小麦的根量（根长和根干重）随土壤深度增加呈减少分布。重旱、轻中旱、适宜和偏湿4种处理的根长垂直分布与自然对照的相关系数分别为0.91、0.29、0.90和0.86，其中重旱与自然对照的相关性最好，轻中旱较差。土壤水分可以影响冬小麦根系的生长。土壤水分充足时，有利于根系生长，使表层根系量增多，根干物质量增加；土壤水分亏缺时，则相反。轻度干旱有利于中下层根系的延伸生长。冬小麦的根长密度与根重密度的相关系数呈显著的正相关，根系粗度随土壤深度的增加减少。

关键词: 根系分布, 根长, 根长密度, 根重密度, 根系粗度

Abstract:

Development of wheat root system in soil under field condition is an indispensable parameter, which could quantify accurately the reaction between vegetation and climate and provide references for scientific management of wheat production and development of water saving agriculture. Using a large root monitoring system at Gucheng ecological environment and agriculturual observation station, roots of wheat species “NO.22Jimai” were observated, including root length, root length density, root dry-weight density and root diameter. Vertical distributions of roots were analyzed. The results indicate that the root length and root dry-weight decrease with increase of soil depth. There are four different treatments in this experiment, i.e. severe drought, light/middle drought, suitable moisture and heavy moisture. Correlation coefficients of root lengths between four treatments and a control experiment are 0.91, 0.29, 0.90 and 0.86 respectively. Root growth can be affected by soil moisture conditions. It is conducive to increase the amount of wheat root in upper layers and root biomass under sufficient soil water condition, while the inverse is true under water stress. Light drought is favorable to extend wheat roots in middle/lower layer soil. Root length density and root dry-weight density have a significant positive linear correlation in various soil depths. Root diameter decreases with increase of soil depth.

Key words: Root system distribution, Root length, Root length density, Root dry-weight density, Root diameter