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Corn and cotton root growth in response to soil impedance and water potential
Year:
1981
Authors :
Bar-Yosef, Bnayahu
;
.
Volume :
45
Co-Authors:

B. Bar‐Yosef  

J. R. Lambert

Facilitators :
From page:
930
To page:
935
(
Total pages:
6
)
Abstract:

The equation dL/dt = C · L, which relates root elongation rate (dL/dt) to root length capable of growth (L), was tested on split root systems of corn and cotton under controlled laboratory conditions. Evidence is presented for the validity of the equation for the various parts of the root system when the growth period was up to 50 days. While the equation held, C, the specific root growth rate, was affected by soil impedance and water potential (ψ), varying between 0.02 and 0.15 per day for the cotton and between 0.03 and 0.28 per day for corn. When the various parts of the root system were under the same soil density (d) and different ψ, C varied with ψ according to a bell‐shaped relationship. When d was different, C decreased monotonically with increasing d values.

The flux of water uptake by cotton and corn had a peak at a matric potential between −0.13 and −0.20 bar and was about 0.02 and 0.03 ml cm−1 root day−1, respectively.

Note:
Related Files :
corn
COTTON
Gossypium
roots
soil
water
Zea mays
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More details
DOI :
10.2136/sssaj1981.03615995004500050022x
Article number:
0
Affiliations:
Database:
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
52814
Last updated date:
02/03/2022 17:27
Creation date:
29/12/2020 23:24
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Scientific Publication
Corn and cotton root growth in response to soil impedance and water potential
45

B. Bar‐Yosef  

J. R. Lambert

Corn and cotton root growth in response to soil impedance and water potential

The equation dL/dt = C · L, which relates root elongation rate (dL/dt) to root length capable of growth (L), was tested on split root systems of corn and cotton under controlled laboratory conditions. Evidence is presented for the validity of the equation for the various parts of the root system when the growth period was up to 50 days. While the equation held, C, the specific root growth rate, was affected by soil impedance and water potential (ψ), varying between 0.02 and 0.15 per day for the cotton and between 0.03 and 0.28 per day for corn. When the various parts of the root system were under the same soil density (d) and different ψ, C varied with ψ according to a bell‐shaped relationship. When d was different, C decreased monotonically with increasing d values.

The flux of water uptake by cotton and corn had a peak at a matric potential between −0.13 and −0.20 bar and was about 0.02 and 0.03 ml cm−1 root day−1, respectively.

Scientific Publication
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