Plant and Soil

, Volume 235, Issue 2, pp 135–142

Scaling of root length density of maize in the field profile

Article

DOI: 10.1023/A:1011972019617

Cite this article as:
Zhuang, J., Yu, G. & Nakayama, K. Plant and Soil (2001) 235: 135. doi:10.1023/A:1011972019617

Abstract

Root length density is an important parameter in crop growth simulation and in evaluating consequences of root pattern on crop water and nutrient uptake. In this study, a scaling model was presented for estimating the profile distribution of root length density of maize (Zea mays L.). The model inputs are root length data of a reference profile and bulk densities of soil layers, as well as root length data in the first soil layer of a field profile to be investigated. Using the root length data of 10 soil profiles investigated over 2 years, the model was examined. The results show that the proposed scaling approach is effective in estimating the root length density of each layer of soil in the field profile. The relative root mean square error (RRMSE) of the developed scaling model was 25.28%, while that of the traditional exponential model was 39.53%. The scaling approach would facilitate determination of heterogeneous distributions of root length densities in the field.

field profile root length density scaling 

Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  1. 1.Faculty of HorticultureChiba UniversityMatsudo city, ChibaJapan
  2. 2.Institute of Geographical Science and Natural Resources ResearchChinese Academy of SciencesBeijingP.R. China

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