נגישות
menu      
חיפוש מתקדם
תחביר
חפש...
הספר "אוצר וולקני"
אודות
תנאי שימוש
ניהול
קהילה:
אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Long-term impact of agricultural practices on biological soil crusts and their hydrological processes in a semiarid landscape
Year:
2013
Source of publication :
Journal of Arid Environments
Authors :
ברקאי, דניאל
;
.
צעדי, אלי
;
.
Volume :
90
Co-Authors:
Zaady, E., Department of Natural Resources and Agronomy, Gilat Research Center, Agricultural Research Organization, Mobile Post Negev 2, 85280, Israel
Arbel, S., Soil Erosion Research Station, Ministry of Agriculture, Emek Hefer, Israel
Barkai, D., Department of Natural Resources and Agronomy, Gilat Research Center, Agricultural Research Organization, Mobile Post Negev 2, 85280, Israel
Sarig, S., The Katif Research Center, Mobile Post Negev, Sedot-Negev, 85200, Israel
Facilitators :
From page:
5
To page:
11
(
Total pages:
7
)
Abstract:
The natural landscapes of semiarid areas worldwide comprise a series of scattered patches of shrubs within a matrix of biologically crusted soils (BSC). As BSCs are considered ecosystem engineers the relationships between the BSC and the shrub patches determine system functioning. The objective of our study was to investigate long-term effects of agricultural practices on biological soil crusts and their influence on hydrological aspects of a semiarid ecosystem. During 1991, we experimentally simulated five of the area's agricultural practices; 1) Scraping - the topsoil was removed to a depth of 2 cm, 2) Spraying - phototrophic organisms were chemically killed with herbicide, 3) Mowing - perennial vegetation was cut and spread to simulate grazing practices, 4) Car track - a heavy roller was used to simulate car-tracks, 5) Control - undisturbed natural plots. Sixteen years later, in 2007, these agricultural practices were found to have a long-term effect on the crusted soil surface and the related soil-surface properties. Mowing and car-track treatments led to decreased overland runoff and increased hydraulic conductivity, whereas scraping and spraying treatments led to increased overland runoff production and decreased hydraulic conductivity. We conclude that the practices had a long-term residual impact on BSC succession and related soil surface properties, which affected the hydrological processes and system functioning. © 2012 Elsevier Ltd.
Note:
Related Files :
agricultural practice
chlorophyll
ecosystem health
polysaccharide
runoff
spray
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/j.jaridenv.2012.10.021
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
21206
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:42
You may also be interested in
Scientific Publication
Long-term impact of agricultural practices on biological soil crusts and their hydrological processes in a semiarid landscape
90
Zaady, E., Department of Natural Resources and Agronomy, Gilat Research Center, Agricultural Research Organization, Mobile Post Negev 2, 85280, Israel
Arbel, S., Soil Erosion Research Station, Ministry of Agriculture, Emek Hefer, Israel
Barkai, D., Department of Natural Resources and Agronomy, Gilat Research Center, Agricultural Research Organization, Mobile Post Negev 2, 85280, Israel
Sarig, S., The Katif Research Center, Mobile Post Negev, Sedot-Negev, 85200, Israel
Long-term impact of agricultural practices on biological soil crusts and their hydrological processes in a semiarid landscape
The natural landscapes of semiarid areas worldwide comprise a series of scattered patches of shrubs within a matrix of biologically crusted soils (BSC). As BSCs are considered ecosystem engineers the relationships between the BSC and the shrub patches determine system functioning. The objective of our study was to investigate long-term effects of agricultural practices on biological soil crusts and their influence on hydrological aspects of a semiarid ecosystem. During 1991, we experimentally simulated five of the area's agricultural practices; 1) Scraping - the topsoil was removed to a depth of 2 cm, 2) Spraying - phototrophic organisms were chemically killed with herbicide, 3) Mowing - perennial vegetation was cut and spread to simulate grazing practices, 4) Car track - a heavy roller was used to simulate car-tracks, 5) Control - undisturbed natural plots. Sixteen years later, in 2007, these agricultural practices were found to have a long-term effect on the crusted soil surface and the related soil-surface properties. Mowing and car-track treatments led to decreased overland runoff and increased hydraulic conductivity, whereas scraping and spraying treatments led to increased overland runoff production and decreased hydraulic conductivity. We conclude that the practices had a long-term residual impact on BSC succession and related soil surface properties, which affected the hydrological processes and system functioning. © 2012 Elsevier Ltd.
Scientific Publication
You may also be interested in