Does spatial arrangement of 3D plants affect light transmission and extinction coefficient within maize crops?

被引：23

作者：

Drouet, J. -L. ^{[1
]}

Kiniry, J. R. ^{[2
]}

机构：

[1] INRA, AgroParisTech Environm & Grandes Cultures, F-78850 Thiverval Grignon, France

[2] USDA ARS, Grassland Soil & Water Res Lab, Temple, TX 76502 USA

来源：

FIELD CROPS RESEARCH | 2008年 / 107卷 / 01期

关键词：

3D plant architecture; light extinction coefficient; light transmission fraction; maize; row spacing; time integration;

D O I：

10.1016/j.fcr.2007.12.015

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Row spacing effects on light interception and extinction coefficient have been inconsistent for maize (Zea mays L.) when calculated with field measurements. To avoid inconsistencies due to variable light conditions and variable leaf canopies, we used a model to describe three-dimensional (3D) shoot structures combined with a model of 3D light transfer. The MODICA model mimics 3D shoot structures of maize plants from digitizations in the field and makes it possible to simulate associated hypothetical canopies by re-arranging plants into different row spacings. All row spacings examined with the model had 10 plants m(-2). By using the light model RTRI, simulations showed the relative importance of development stage and time integration on fraction of light transmitted and on the extinction coefficient. Narrow row spacings consistently had less transmitted light and greater values of extinction coefficient. This modelling tool shows promise to effectively evaluate row spacing to optimize light interception. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：62 / 69

页数：8

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