Abstract :

1
??? ?????? ??? ? ????? ????? ????? ????? ?? 3
?? 4 ??? ????? ??????? ???? ??????? (Panicum
antidotale ) ? ??????? ????? ?? ?? ???? ?? ?????
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????? ?????? ) ?? 18 ??? ????? ?? ??? ????? ?????
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??? ) ? ?????? ( ????? ??? ?? 20 ??? ) ? ?????? 2
?? 3 ??? ?? ?? ?????? ?????? ? ????? ????? ???
?????? ???? ? ?????? ????? ????? ?? ????? ? ????
???? ???? ??? ?? ????? ?????? ??????? ???? ?????
????? ? ????? ?????? ?? ??? ????? ?? ??? ?????
???? ??????? 1- ?????? ???????? 1356? ??????
????? ?? ???? ???????? ??????? ????? 2- ??????
?????????? ???? ?????? 1367? ????? ???? ??? ???
??????? ? ????? ??????? ??? ????? ????? 59 ?
?????? ?????? ? ????? ???? 3- ????? ? ???? ???? ?
1348 ? ????? ?????? ????? ????? ? ???????
????? 4- ???? ???? ???? 1373? ????? ????? ??????
?? ?? ???????? ????? ???? ????? ????? 94 ?????
??????? ?????? ? ????? ???? 5- ?????? ????? 1384?
????? ???? ???? ??? ??? ????? ????? ???? ????? ?
???? ?????? ?????? ?????? ? ????? ???? 6- ??????
????? 1379? ?? ??????? ???? ????? ??????
Cenchrus ciliaris ??? ????? ????? ???? ???
???????? ????? ?????? ??? ????????? ???? ???????
????? ????? ? ???? ??? ??????? 7- ?????? ?????
1383? ??????? ? ????? ??????? ??????? ????? ?????
??? ???????? ?????? ??????? ?????? ??????? ?????
????? ??? 8- Beaty . E. R. John D. Powell ,
1976 , Response of Switchgrass (Panicum virgatum)
to Clipping Frequency , Journal of Range
Management 29 (2).
9- Dabadghao , P.
M. , Roy, R. D. Marwaha , S. P. The effect of
interval and intensity of Defolation on the dry
matter production of some impotant grass species
of western Rajastan . Ann . Arid . Zone , 12 1-
8 10- Miller , J.E. 1976 , Grasses and Legumes in
Texas . Texas University 11- Robinett . D . 2004
. Management and uses of Blue panic . U. S.
Department of AgricultureAnd Natural Resources
service m , Tucson . Arizona .

12-Skerman.P.J.Riveros.F.1990,TropicalGrasses,F.
A.O.
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?????? ??????? ??? ? ??????? ????? ??? ? ??? ????
????? ?? ?? ???? ???? ???? ?? ?? ?? . ??????? ??
???? ???? ????? ?? ????? ? ?? ?????? ?? ??? ???
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???? ?????? ???? ??????? ???? ?? ???? . ??? ?????
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?????? ? ???? ????? ??? ????? ( ????? ) ?????? ??
????? ?????? ??????? ? ???? ???? ?? ??????? ?????
?? ??????? ???? ????? ???? ???? . ?????? ?????
????? ? ?? ??????? ?? ??? ?????? ??? ??? ?? ????
????? ? ?? ???????? ???? ( ????? ?? ????? ??????
)? ? ???? ( ????? ?? ??? ?????? ) ?? ???? ?? ??
???? ???? ????? ???? ???? . ????? ?? ???? ??????
?????? ???? ??? ?? ??? ??? ????? ???? ( ?? 18 ???
????? ?????? ) ?? ??? ????? ???? ?? ???? ????
??????? ???? . ??? ?? ???? ?? ???? ?????? ?????
????? ??? ????? ????? ??? ????? 36 ??? ?? ?? ???
?? ????? ???? ??? . ??????? ? ???? ???? ? ?????
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? ?????? ???? ???????? ???? ???? ?????? ???
. Abstract Blue panic (Panicum
antidotale) is a warm season grass native to
south Iran and considered as a major species of
the tall grass sandy rangelands. It is succulent
and nutritious in the young stage, but becomes
fibrous and woody at maturity. Blue panicgrass
has a vigorous seedling and is relatively easy to
establish. It is highly productive the first
years, but loses vigor in subsequent years. To
its forage value, Blue panicgrass is widely used
in areas where soil conserving practices are
needed . This investigation was designed to
achive major objective , to establish the
response in tiller production of Blue panicgrass
to clipping frequency and clipping regimes
suitable for sustained plant .This study was
conducted on Blue panicgrass species at Khuzistan
sand dune experimental station. Four replication
were included in a splite plot design. Clipping
frequency was main treatment and clipping
quantity was secondary treatment. Comparison of
the 3 years harvest frequency has shown that
harvesting submain treatment number 3 (clipped
each 18 days ) superior to the other treatments.
Over 3-year period , tiller per clone were ,
averaging 36 for that submain treatment. Higher
clonal survival and tillers per clone on that
treatment clipped (each 18 days) may have been
due to slightly longer period after the last clip
, which enables the plant to resupply storage
tissues . ????? ??????? ????? ????? ??????? ??
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