Sward characterization and grazing value of a hilly Mediterranean natural pasture

Systèmes sylvopastoraux. Pour un environnement, une agriculture et une économie durables

Zaragoza : CIHEAM

Cahiers Options Méditerranéennes; n. 12 1995

pages 143-146

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--- Ledda L., Caredda S., Porqueddu C., Sulas L. Sward ch aracterization an d grazin g valu e of a h illy Mediterran ean n atu ral pastu re. Systèmes sylvopastoraux. Pour un environnement, une agriculture et une économie durables . Zaragoza : CIHEAM, 1995. p. 143-146 (Cahiers Options Méditerranéennes; n.

12)

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Sward characterization and grazing value of a hilly

C. Porqueddu**, Sulas

**

E. Nicola 07 1 O0

Summary: Within the EEC at the study of the

on the was conducted in to the effects

on of two types The the 1st

outïn two homogeneous basins (10 ha each one) this

Wide the due to the

available at the end of the the in the

was in the basin. The most botanical families Compositae,

The value low because of the

of many species with low specific index The the

of the in quantitative and qualitative The hight amount of

at the end of the in the is an The effects

of to be studied

value.

l one. The the of available the

l

l

~

to

to et al.,. and

Land Use) is aimed at

to activity

this was

in two a

vs by the

of in of

in

two

basins (10 ha each one) in on by high slope (mean slope

40%, to 379 et al., 1994).

by the EEC ^'I

-

The two of the soil (sandy loam N and

of the

The climate of the is an

mm

used to

(500 in each basin).

m

two basins.

on 10 of sampling, the (CSC) was evaluated in

to

CSC data and specific indices calculated communication).

l ^I

0 4 ^I

Nov Dec Jan Feb Mar Apr May

' I

Sward surface height Nov Dec Jan Feb Mar Apr Jun

I

2: Available green forage (on basis)

to

The mean to the 1)

in to

0.5 to Asphodelus spp.

GaZactites tomentosa and CarZina corimbosa

(fig.2) to

the of Compositeae,

to the total 80 to

to 1.08

144

the months the in the two basins and low

the the,

the available the when to the

The peak value was in to to the

animal selection in the the the

(end of the the total 0.39 and

1.63 to 60% of the total in the

the it

the than in the the it to

to 88% in the The maximum value

in the and in in the the two

of (5%) value of

(in the it 8 to 38% and in the to 22%).

the

identified. The CSC of the main botanical families and the to the value shown in table 1. Among the the

by Liliaceae (14% of total contacts) with Asphodelus microcarpus.

The value of the was 26.4 and it 21.7 to 3 1 in the sites of sampling.

Table l : of total contacts and contribution to V of several species groups in

Families

I

I

Graminaceae I 28 3 5 . 0

26.0 other families 33

20 0.0 species

30.5 Compositeae 14

8.5 5

in to the

in to the et al., 1987). Noticeable

due to the

available of total

in late in the than in the the

of soil in the

in of CSC the families Compositae, Graminaceae, and

Liliaceae. The value in

et al. 1992), because of the

of the on total low

the of low quality on the the

in quantitative and qualitative and this step at the beginning of

in to the of the

The at the the is

in to the

the

145

Bullitta P., Caredda S., G., 1987. dell'andamento e della concimazione azotata sulla totale e stagionale di un pascolo in di Agronomia 21(2): 145-15 1.

Bullitta P., Bagella S., Caredda S., 1992. and the

Abstracts . 1991, n. 395.

Caredda S., Porqueddu C., 1994. The against soil of the

in the the meeting "Land use and soil

in Sardinia". 25/5/1994

P., Poissonet J., 1969. Analyse phitologique des prairies; application agronomique. CEPE 48, 67 pp.

Enne G., G., Pisano G., 1994. an to the study

of to the use of soil. the meeting "Land use and soil Sardinia'!

G.N., 1981. Grazing arid and semiaridpastures. New 181-201

.S., A., G, Goussikpe 1994. of the

Astimini- Fiume Santo

-

in Sardinia'! 25/5/1994

A., 1994. climatic outlines of the Astimini

-

1 46