| |
| Web URL(s): | https://dl.sciencesocieties.org/publications/aj/pdfs/77/6/AJ0770060878
Last checked: 12/09/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
|---|
| Publication Type:
| Refereed |
|---|
| Author(s): | Agnew, M. L.;
Carrow, R. N. |
|---|
| Author Affiliation: | Agnew: Assistant Professor, Department of Horticulture, Iowa State University, Ames, Iowa; Carrow: Associate Professor, Department of Agronomy, University of Georgia, Experiment, Georgia |
|---|
| Title: | Soil compaction and moisture stress preconditioning in Kentucky bluegrass. II. Stomatal resistance, leaf water potential, and canopy temperature |
|---|
| Source: | Agronomy Journal. Vol. 77, No. 6, November/December 1985, p. 878-884. |
|---|
| Publishing Information: | Washington: American Society of Agronomy |
|---|
| # of Pages: | 7 |
|---|
| Keywords: | TIC Keywords: Compaction; Water stress; Poa pratensis; Stomatal resistance; Leaf water potential; Canopy temperature; Irrigation; Plant recovery; Stomatal density
|
|---|
| Abstract/Contents: | "In this greenhouse study we investigated the effects of soil compaction and moisture stress preconditioning on stomatal diffusive resistance (Rs), leaf water potential (Ψ1), and canopy minus air temperatures (ΔT) of Kentucky bluegrass (Poa pratensis L. 'Ram I'). The compaction treatments were: (i) NC = no compaction, (ii) LT = long-term compaction over a 99-day period, and (iii) ST = short-term compaction for 9 days. The compactive treatment was equivalent to 720 J energy. Irrigation regimes were initiated at the same time as LT compaction and were: (i) well-watered = irrigation at -0.045 MPa and (ii) water-stressed = irrigation at -0.400 MPa. Ninety-nine days after initiation of preconditioning treatments, a dry-down cycle was started by watering each treatment to saturation. At this time, we monitored on a daily basis Rs, Ψ1, and ΔT. Under low soil O2, Rs remained low for 2 days and then increased over a 5-day period for all treatments, even though Ψ1 did not change until the fifth day after irrigation (DAI). By DAI 9, Rs declined but then increased between DAI 10 to 13 as soil water potential (Ψs) and Ψ1 decreased. As soil water deficits increased, plants preconditioned to LT compaction or water-stressed exhibited lower Ψ1 (0.2 to 0.4 MPa), higher Rs, and higher Δ (1 to 2°C) compared with uncompacted or well-watered plants. Regardless of the cause for higher Rs (i.e., low soil O2, LT compaction or water-stress preconditioning), the result would be lower photosynthesis and greater high-temperature stress." |
|---|
| Language: | English |
|---|
| References: | 24 |
|---|
| See Also: | See also Part 1 "Soil compaction and moisture stress preconditioning in Kentucky bluegrass. I. Soil aeration, water use, and root responses" Agronomy Journal, 77(6) November/December 1985, p. 872-878 R=6986 R=6986 |
|---|
| Note: | Tables
Graphs |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Agnew, M. L., and R. N. Carrow. 1985. Soil compaction and moisture stress preconditioning in Kentucky bluegrass. II. Stomatal resistance, leaf water potential, and canopy temperature. Agron. J. 77(6):p. 878-884. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=6987 |
| If there are problems with this record, send us feedback about record 6987. |
| Choices for finding the above item: |
|---|
| Web URL(s):
https://dl.sciencesocieties.org/publications/aj/pdfs/77/6/AJ0770060878
Last checked: 12/09/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
| 
MSU catalog number: S 22 .A45 |
| Find from within TIC:
Digitally in TIC by record number. |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
