Applicable Range of the Pipe Model to the Structure of Soybean (Glycine max Merr.) Root System

Japanese Journal of Crop Science

Noriyuki TANAKA¹  Susumu ARIMA¹  Jiro HARADA¹  Minoru MIHARA¹ 

关键词: Glycine max Merr.;    根径;    Pipe model;    根系;    Plow sole depth;    作土深;    Root diameter;    ダイズ;    Root system;    地下水位;    Soybean;    パイプモデル;    Underground water level;   

DOI  :  10.1626/jcs.63.63

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The applicability of the pipe model to the structure of soybean (Glycine max Merr.) root system grown under various underground water levels or depths of plow sole were investigated. The form, distribution and quantity of root systems changed with the growth conditions. However, cumulative root dry weight of thin roots showed a linear regression with dry weight of thick roots irrespective of soil layer or treatment. Also, in the case of roots whose diameter was over 0.25 mm, negative linear regression was seen between the diameter classes and their cumulative length. Therefore, the structure of the root system was considered to correspond to the pipe model. Meanwhile, as a result of further detailed analyses by using the "Ideal pipe" concept that we have introduced, the range of the soybean root system to which the pipe model is applicable is more than about 1 mm in diameter. The length of thin roots whose diameter are less than about 1 mm was considerably larger than that predicted by the model.

【 授权许可】

Unknown