Mechanical and Hydric Stress Effects on Maize Root System Development at Different Soil Compaction Levels

被引:26
作者
de Moraes, Moacir Tuzzin [1 ]
Debiasi, Henrique [2 ]
Franchini, Julio Cezar [2 ]
Bonetti, Joao de Andrade [3 ]
Levien, Renato [4 ]
Schnepf, Andrea [5 ]
Leitner, Daniel [6 ]
机构
[1] Fed Univ Technol Parana Campus Francisco Beltrao, Dept Agron Sci, Francisco Beltrao, Brazil
[2] Embrapa Soybean, Dept Soil & Crop Management, Londrina, Parana, Brazil
[3] Univ Estadual Maringa, Dept Agron, Maringa, Parana, Brazil
[4] Univ Fed Rio Grande do Sul, Dept Soil Sci, Porto Alegre, RS, Brazil
[5] Forschungszentrum Juelich, Inst Bio & Geosci, IBG Agrosphere 3, Julich, Germany
[6] Simulationswerkstatt, Serv Computat Sci, Leonding, Austria
来源
FRONTIERS IN PLANT SCIENCE | 2019年 / 10卷
关键词
root growth modeling; drought stress; soil strength; soil physical limitation; Zea mays; WATER-UPTAKE; PENETROMETER RESISTANCE; PENETRATION RESISTANCE; HYDRAULIC CONDUCTIVITY; GROWTH; MODEL; ELONGATION; SIMULATION; IMPEDANCE; PRESSURE;
D O I
10.3389/fpls.2019.01358
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Soil mechanical resistance, aeration, and water availability directly affect plant root growth. The objective of this work was to identify the contribution of mechanical and hydric stresses on maize root elongation, by modeling root growth while taking the dynamics of these stresses in an Oxisol into consideration. The maize crop was cultivated under four compaction levels (soil chiseling, no-tillage system, areas trafficked by a tractor, and trafficked by a harvester), and we present a new model, which allows to distinguish between mechanical and hydric stresses. Root length density profiles, soil bulk density, and soil water retention curves were determined for four compaction levels up to 50 cm in depth. Furthermore, grain yield and shoot biomass of maize were quantified. The new model described the mechanical and hydric stresses during maize growth with field data for the first time in maize crop. Simulations of root length density in 1D and 2D showed adequate agreement with the values measured under field conditions. Simulation makes it possible to identify the interaction between the soil physical conditions and maize root growth. Compared to the no-tillage system, grain yield was reduced due to compaction caused by harvester traffic and by soil chiseling. The root growth was reduced by the occurrence of mechanical and hydric stresses during the crop cycle, the principal stresses were mechanical in origin for areas with agricultural traffic, and water based in areas with soil chiseling. Including mechanical and hydric stresses in root growth models can help to predict future scenarios, and coupling soil biophysical models with weather, soil, and crop responses will help to improve agricultural management.
引用
收藏
页数:18
相关论文
共 61 条
[1]   COMPUTER-SIMULATION OF CHANGES IN SOIL MINERAL NITROGEN AND CROP NITROGEN DURING AUTUMN, WINTER AND SPRING [J].
ADDISCOTT, TM ;
WHITMORE, AP .
JOURNAL OF AGRICULTURAL SCIENCE, 1987, 109 :141-157
[2]  
Allen R.G., 1998, IRRIGATION DRAINAGE
[3]   Koppen's climate classification map for Brazil [J].
Alvares, Clayton Alcarde ;
Stape, Jose Luiz ;
Sentelhas, Paulo Cesar ;
de Moraes Goncalves, Jose Leonardo ;
Sparovek, Gerd .
METEOROLOGISCHE ZEITSCHRIFT, 2013, 22 (06) :711-728
[4]  
[Anonymous], 2006, SISTEMA BRASILEIRO C
[5]   Physical Soil Structure Evaluation based on Hydraulic Energy Functions (vol 80, pg 1167, 2016) [J].
Armindo, Robson Andre ;
Wendroth, Ole .
SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 2016, 80 (06) :1708-1708
[6]   Water Dynamics of the Root Zone: Rhizosphere Biophysics and Its Control on Soil Hydrology [J].
Bengough, A. G. .
VADOSE ZONE JOURNAL, 2012, 11 (02)
[7]   Root elongation is restricted by axial but not by radial pressures: so what happens in field soil? [J].
Bengough, A. Glyn .
PLANT AND SOIL, 2012, 360 (1-2) :15-18
[8]   Root elongation, water stress, and mechanical impedance: a review of limiting stresses and beneficial root tip traits [J].
Bengough, A. Glyn ;
McKenzie, B. M. ;
Hallett, P. D. ;
Valentine, T. A. .
JOURNAL OF EXPERIMENTAL BOTANY, 2011, 62 (01) :59-68
[9]   PENETROMETER RESISTANCE, ROOT PENETRATION RESISTANCE AND ROOT ELONGATION RATE IN 2 SANDY LOAM SOILS [J].
BENGOUGH, AG ;
MULLINS, CE .
PLANT AND SOIL, 1991, 131 (01) :59-66
[10]   Modelling rooting depth and soil strength in a drying soil profile [J].
Bengough, AG .
JOURNAL OF THEORETICAL BIOLOGY, 1997, 186 (03) :327-338