physiological and technical problems of out of season strawberry production in marche region n.
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Università di Ancona Dipartimento di Energetica. PHYSIOLOGICAL AND TECHNICAL PROBLEMS OF OUT-OF-SEASON STRAWBERRY PRODUCTION IN MARCHE REGION. Gianluca Savini , Davide Neri, Silvia Bonfigli. Physiology “control”. Factor. Condition. - Plant type - Genotype - Substrate. - Environmental :

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physiological and technical problems of out of season strawberry production in marche region

Università di Ancona

Dipartimento di Energetica

PHYSIOLOGICAL AND TECHNICAL PROBLEMS OF OUT-OF-SEASON STRAWBERRY PRODUCTION IN MARCHE REGION

Gianluca Savini, Davide Neri, Silvia Bonfigli

slide2

Physiology “control”

Factor

Condition

- Plant type

- Genotype

- Substrate

- Environmental :

- photoperiod

- temperature

- chilling

- planting date

- mineral nutrition

-

Production programming

photoperiod

Flower induction

Crown growth

Runner

production

Leaf area

8 10 12 14 16

hours

Hancock (1999)

100

80

60

40

20

0

Flower induction

vegetative growth

Relative growth

0 15 20 25 30

TEMPERATURE (°C )

Hancock (1999)

Genotype

Junebearing (SD)

Photoperiod

Everbering (D.N.)

slide4
Substrate characteristics determine vigour and shoot to root ratio (S/R) thus different physiological response

Substrate

chilling dormancy breaking
Chilling (dormancy breaking)

Chilling induces high vegetative growth in the favourable climatic condition (temp.> 10°C and long day)

Dormancy is induced by low temperature and short day.

objective
Objective:

- Harvest programming

- Different genotype evaluation

- Chilling effect

- Adaptability to different substrate

materials e methods
Materials e Methods
  • Variety: - Paros (June bearing)
  • - Seascape (ever bearing day-neutral)
  • Substrate: - organic (peat and compost)
        • - inorganic (perlite 80% e coconut fiber 20%)
  • Chilling : - 0 hour
  • - 132 “
  • - 432 “
  • Cold storage plant cat. “A”.
trial schedule
Trial schedule

start

chilling

start

plastic house

End

192 ore

End

432 ore

Planting

31/07/00 09/10/00 17/10/00 27/10/00 10/11/00

0 70 78 88 101

days from planting ( d.f.p. )

Temperature:

18/10 °C day/night

photoperiod:

14 hours

Foto impianto

runner production in paros inorganic substrate

control

192 chilling hours

432 chilling hours

Runner production in Paros (inorganic substrate)

d.a.p.= day after planting

runners production in seascape inorganic substrate

1

control

192 chilling hours

0,8

432 chilling hours

0,6

192 h

Runner / plant n.

0,4

432 h

0,2

Inizio chilling

0

d.a.p.

18

31

44

57

70

83

96

109

122

135

148

161

Runners production in Seascape (inorganic substrate)

d.a.p.= day after planting

leaf petiole length in paros
Leaf petiole length in Paros

d.a.c.= day after chilling

leaf petiole length in seascape
Leaf petiole length in Seascape

d.a.c.= day after chilling

slide13

Second (II) internode

(II)

(I)

First (I) internode

Fruit cluster

first internode length in paros
First internode length in Paros

cm

18

Organic

15

Inorganic

12

9

6

3

Chilling h.

0

192

432

second internode length in paros
Second internode length in Paros

cm

Organic

15

Inorganic

12

9

6

3

Chilling h.

0

192

432

slide16

SIMB.

DESCRIPTION

TRUNK

LEAVS

RUNNER

INFLORESCENCE

SHOOT

Control Paros

Frigo plant

slide17

SIMB.

DESCRIPTION

TRUNK

LEAVS

Chilling period

RUNNER

INFLORESCENCE

SHOOT

Paros 432 hours chilling

Frigo plant

fruit weight in paros
Fruit weight in Paros

35

Control

30

192 chilling hours

492 chilling hours

25

20

g / fruit

15

10

5

0

16/2

2/3

16/3

30/3

13/4

27/4

11/5

25/5

date

total fruit production in paros
Total fruit production in Paros

Inorganic

600

Organic

500

400

g / plant

300

200

0

192

432

Chilling h.

total fruit production in seascape
Total fruit production in Seascape

600

Organic

Inorganic

500

400

300

g/plant

200

100

0

0

192

432

Chilling h.

slide21

Conclusion

- Chilling treatment modified:

- First internod cluster length

- Petiole leafs length

- Runner production