摘要
本文根据田间实测资料研究了冬小麦根系各种参数(长度、重量、活性表面和根径)的垂直分布。结果表明,在所观测地区的土壤条件下,冬小麦根系的长度、重量、表面积和体积随深度呈指数分布,而累积根系的长度、重量和表面积随深度呈双曲线型分布。根据作者的观测资料和国内外其它观测资料分析研究表明,对于不同土壤,根区各层土壤中累计根重及根长的百分比随相对深度的变化都符合下列双曲线函数形式:这一研究结果可为根系生态研究和作物对水分吸收的模拟工作提供参考。
It is important to study root distribution for simulating its water absorption in different layers of soil, but there are a few data can be used for this work. This paper gives some field experimental results taken at the Beijing Datun Experimental Station, which provide some idea to the user. The parameters of the root discussed in this paper are root length, root weight, actual area of root surface and root diameter. The results show that the vertical distribution of root length, root weight and area of root surface are logarithmly related to the soil depth, and the accumulated root length, root weight and area of root surface are hyperbotically related to it:V'=Z'/(0.0011+0.0090Z')LV'=Z'/(0.0016+0.0087Z')where V' is accumulated root weight, LV' is accumulated root length. Test with the data taken from other surfaces shows that these types of distribution are suitable to other cases too.
出处
《应用生态学报》
CAS
CSCD
1991年第2期127-133,共7页
Chinese Journal of Applied Ecology
基金
中国科学院野外台站网络研究课题
关键词
小麦
根系参数
垂直分布
Root system of wheat, Length of root system, Weight of root system, Active surface, Vertical distribution.
