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פותח על ידי קלירמאש פתרונות בע"מ -
Biomass partitioning following defoliation of annual and perennial mediterranean grasses
Year:
2002
Source of publication :
Ecology and Society
Authors :
גוטמן, מריו
;
.
רוטמן, סטיבן
;
.
Volume :
5
Co-Authors:
Gutman, M., Agricultural Research Organization, Israel, Agricultural Research Organization, Department of Natural Resources, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Noy-Meir, I., Hebrew University of Jerusalem, Israel
Pluda, D., Volcani Center, Israel
Seligman, N., Volcani Center, Israel
Rothman, S., Volcani Center, Israel
Sternberg, M., Bar-Ilan University, Israel
Facilitators :
From page:
To page:
(
Total pages:
1
)
Abstract:
A two-year experiment was conducted in northeastern Israel to study the effects of various defoliation regimes on biomass partitioning between vegetative and reproductive structures in a perennial and an annual Mediterranean grass. Greater insight into the mechanisms regulating biomass partitioning after defoliation enables ecologists and rangeland managers to interpret and predict population and community dynamics in Mediterranean grasslands more efficiently. Two typical Mediterranean grasses, Triticum dicoccoides, an annual species, and Hordeum bulbosum, a perennial species, were grown in containers in the open. They were subjected to a series of defoliation treatments that comprised three clipping frequencies and three clipping heights in a full factorial combination. In addition, individuals of both species were sampled in the field, in paddocks that were grazed, and in a control exclosure that was closed to grazing during the growing season. The experiment was conducted over two growing seasons, one unusually dry and one unusually wet. The clipping treatments invariably caused a reduction in the amount of biomass partitioned to the reproductive organs, but had little effect on the vegetative components of the plants. Greater tillering following defoliation compensated, to a large degree, for the loss of photosynthetic biomass following defoliation. The effect of grazing on biomass partitioning was much lower than the effect of clipping. Under grazing, the investment in reproductive biomass was considerably higher than when the grasses were clipped. The results of this experiment help to elucidate the reasons for the persistence of these species and, especially, for the dominance of Hordeum bulbosum in many eastern Mediterranean grasslands. Copyright © 2001 by the author(s). Published here under license by The Resilience Alliance.
Note:
Related Files :
Annual vs. perennial grasses
Biomass partitioning
Grazing response
Hordeum bulbosum
Israel
Mediterranean
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
26517
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:23
You may also be interested in
Scientific Publication
Biomass partitioning following defoliation of annual and perennial mediterranean grasses
5
Gutman, M., Agricultural Research Organization, Israel, Agricultural Research Organization, Department of Natural Resources, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Noy-Meir, I., Hebrew University of Jerusalem, Israel
Pluda, D., Volcani Center, Israel
Seligman, N., Volcani Center, Israel
Rothman, S., Volcani Center, Israel
Sternberg, M., Bar-Ilan University, Israel
Biomass partitioning following defoliation of annual and perennial mediterranean grasses
A two-year experiment was conducted in northeastern Israel to study the effects of various defoliation regimes on biomass partitioning between vegetative and reproductive structures in a perennial and an annual Mediterranean grass. Greater insight into the mechanisms regulating biomass partitioning after defoliation enables ecologists and rangeland managers to interpret and predict population and community dynamics in Mediterranean grasslands more efficiently. Two typical Mediterranean grasses, Triticum dicoccoides, an annual species, and Hordeum bulbosum, a perennial species, were grown in containers in the open. They were subjected to a series of defoliation treatments that comprised three clipping frequencies and three clipping heights in a full factorial combination. In addition, individuals of both species were sampled in the field, in paddocks that were grazed, and in a control exclosure that was closed to grazing during the growing season. The experiment was conducted over two growing seasons, one unusually dry and one unusually wet. The clipping treatments invariably caused a reduction in the amount of biomass partitioned to the reproductive organs, but had little effect on the vegetative components of the plants. Greater tillering following defoliation compensated, to a large degree, for the loss of photosynthetic biomass following defoliation. The effect of grazing on biomass partitioning was much lower than the effect of clipping. Under grazing, the investment in reproductive biomass was considerably higher than when the grasses were clipped. The results of this experiment help to elucidate the reasons for the persistence of these species and, especially, for the dominance of Hordeum bulbosum in many eastern Mediterranean grasslands. Copyright © 2001 by the author(s). Published here under license by The Resilience Alliance.
Scientific Publication
You may also be interested in