Rice root growth and function in the rainfed Lowlands: implications for rice in the uplands

Benjamin K. Samson, Leonard Wade

Research output: Book chapter/Published conference paperConference paper

Abstract

Rice roots are commonly shallow in rainfed lowland conditions. Mechanical impedance is one factor that may restrict access of roots to deeper soil layers, thereby reducing the capacity of the root system to extract water from depth during late-season drought. The capacity of rice roots to penetrate hardpans was examined in Rajshahi, Bangladesh. Eight rice lines showed differing abilities to penetrate through soil layers that increased in soil penetration resistance to 3.0 MPa at 15-25 cm depth in the rainfed experiments. Unfortunately, soil water extraction was not measured in the study. Two studies, at the same site, used three and five rice lines, respectively, to determine if differences in pattern and capacity to extend into deeper soil layers resulted in differences in extracting soil moisture as drought progressed. The magnitude of root length density did not directly relate to the speed of soil water extraction. The implications and opportunities presented by these studies in the uplands are discussed.
Original languageEnglish
Title of host publicationIRRI Drought Frontier Project
Publication statusPublished - 2007
EventRoot Biology and MAS Workshop - Bangalore, India, India
Duration: 26 Sep 200729 Sep 2007

Workshop

WorkshopRoot Biology and MAS Workshop
CountryIndia
Period26/09/0729/09/07

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root growth
lowlands
highlands
rice
soil water
Bangladesh
drought
soil penetration resistance
soil
impedance
root systems
extracts
water

Cite this

Samson, B. K., & Wade, L. (2007). Rice root growth and function in the rainfed Lowlands: implications for rice in the uplands. In IRRI Drought Frontier Project
Samson, Benjamin K. ; Wade, Leonard. / Rice root growth and function in the rainfed Lowlands : implications for rice in the uplands. IRRI Drought Frontier Project. 2007.
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title = "Rice root growth and function in the rainfed Lowlands: implications for rice in the uplands",
abstract = "Rice roots are commonly shallow in rainfed lowland conditions. Mechanical impedance is one factor that may restrict access of roots to deeper soil layers, thereby reducing the capacity of the root system to extract water from depth during late-season drought. The capacity of rice roots to penetrate hardpans was examined in Rajshahi, Bangladesh. Eight rice lines showed differing abilities to penetrate through soil layers that increased in soil penetration resistance to 3.0 MPa at 15-25 cm depth in the rainfed experiments. Unfortunately, soil water extraction was not measured in the study. Two studies, at the same site, used three and five rice lines, respectively, to determine if differences in pattern and capacity to extend into deeper soil layers resulted in differences in extracting soil moisture as drought progressed. The magnitude of root length density did not directly relate to the speed of soil water extraction. The implications and opportunities presented by these studies in the uplands are discussed.",
author = "Samson, {Benjamin K.} and Leonard Wade",
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}

Samson, BK & Wade, L 2007, Rice root growth and function in the rainfed Lowlands: implications for rice in the uplands. in IRRI Drought Frontier Project. Root Biology and MAS Workshop, India, 26/09/07.

Rice root growth and function in the rainfed Lowlands : implications for rice in the uplands. / Samson, Benjamin K.; Wade, Leonard.

IRRI Drought Frontier Project. 2007.

Research output: Book chapter/Published conference paperConference paper

TY - GEN

T1 - Rice root growth and function in the rainfed Lowlands

T2 - implications for rice in the uplands

AU - Samson, Benjamin K.

AU - Wade, Leonard

N1 - Imported on 03 May 2017 - DigiTool details were: publisher = 2007. Event dates (773o) = 26-29 September 2007; Parent title (773t) = IRRI Drought Frontier Project.

PY - 2007

Y1 - 2007

N2 - Rice roots are commonly shallow in rainfed lowland conditions. Mechanical impedance is one factor that may restrict access of roots to deeper soil layers, thereby reducing the capacity of the root system to extract water from depth during late-season drought. The capacity of rice roots to penetrate hardpans was examined in Rajshahi, Bangladesh. Eight rice lines showed differing abilities to penetrate through soil layers that increased in soil penetration resistance to 3.0 MPa at 15-25 cm depth in the rainfed experiments. Unfortunately, soil water extraction was not measured in the study. Two studies, at the same site, used three and five rice lines, respectively, to determine if differences in pattern and capacity to extend into deeper soil layers resulted in differences in extracting soil moisture as drought progressed. The magnitude of root length density did not directly relate to the speed of soil water extraction. The implications and opportunities presented by these studies in the uplands are discussed.

AB - Rice roots are commonly shallow in rainfed lowland conditions. Mechanical impedance is one factor that may restrict access of roots to deeper soil layers, thereby reducing the capacity of the root system to extract water from depth during late-season drought. The capacity of rice roots to penetrate hardpans was examined in Rajshahi, Bangladesh. Eight rice lines showed differing abilities to penetrate through soil layers that increased in soil penetration resistance to 3.0 MPa at 15-25 cm depth in the rainfed experiments. Unfortunately, soil water extraction was not measured in the study. Two studies, at the same site, used three and five rice lines, respectively, to determine if differences in pattern and capacity to extend into deeper soil layers resulted in differences in extracting soil moisture as drought progressed. The magnitude of root length density did not directly relate to the speed of soil water extraction. The implications and opportunities presented by these studies in the uplands are discussed.

M3 - Conference paper

BT - IRRI Drought Frontier Project

ER -