Agriculture Reference
In-Depth Information
Table 5.4.
Characteristics of the hemp varieties tested by the FDGEDA de l'Aube in 1999.
ITC 2003 (FNPC)
Maturity
Hurd yield (t/ha)
Fibre content (%)
Seed yield (ql/ha)
Finola
1.60
18.60
20.33
S302
8.21
39.30
59.00
S301
8.24
37.00
58.00
Glukho 46
8.27
38.10
66.67
Zolo 11
8.61
38.60
41.67
USO 31
Early maturing
8.75
44.50
64.33
F17
Early maturing
9.75
33.70
7.30
Glukho33
9.79
36.80
82.67
F12
Early maturing
9.80
39.20
64.33
A comparison of the diameter of the
stems, taken at the base, as a function of the
variety was examined by the FDGEDA de
l'Aube in 1999 (Fig. 5.5).
Table 5.5.
Results of the tests on the most recent
varieties (FNPC, 2002; ITC, 2003).
ITC 2003 (SPC)
Fibre
content
(%)
Seed
yield
(ql/ha)
The protocol used by Frédéric Michel
(European FAIR programme, 1999) used four
replications of 20 varieties sown to produce a
final stand of 150 plants/m
2
. The stem
diameters were measured on the third day of
harvesting and taken at the base of the plant,
5 cm from the soil line. Twenty-five stems were
measured on two replicates and averages were
computed.
The average diameter varied between
6 and 9 mm, with a standard deviation some-
times close to zero (i.e. plants were very uni-
form). It appeared that D88, F75, E68 and
F17 were very uniform according to this
criterion. By contrast, significant difference was
observed between the slender varieties (Fasamo,
Bialobaszie and USO31) and the stockier varie-
ties. However, these results must be viewed
with caution as they are based on only two rep-
lications. This trait is of great importance to
industry during fibre extraction and has also
been studied in L'Eure and by the FNPC.
Generally speaking, it has been observed
that the stem diameter is strongly dependent
on stand density (plants/m
2
), which is a func-
tion of seeding rate and germination. This can
be summarized as follows:
Hurd yield
(t/ha)
Maturity
F12
Early
maturing
5.80
31.90
10.43
F34
Average
5.83
30.60
9.20
F17
Early
maturing
6.07
27.87
9.27
S27
Average
6.50
34.60
7.73
•
the hurd yield is highest for E68, F74,
F75 and D88 (dioecious variety)
the highest fibre levels are obtained from
•
F12, S204, S201 and D88
the best seed yield is obtained from F19,
•
F17 and F12.
Among those varieties tested most recently
(2004-2005), F75 and E68 offer very good
hurd yields. Similar results for hurd yield are
obtained from the newly tested varieties, Lipko,
USO and Fibranova (dioecious varieties), with
the best fibre yields to date. At the time of writ-
ing, the varieties F32, F12, F34 and Santhica
27 showed the highest fibre yields, while the
Kompolti and Carmagnola varieties performed
worst in these trials.
The varieties with the best seed yield are
E68, F75, delta 405 and Kompolti. All such
encouraging results are being subjected to fur-
ther tests.
Many stems = fine diameter
Few stems = large diameter
The height of the plant is secondary.
