Articles
FACTORS AFFECTING THE GROWTH AND MINERAL NUTRITION OF STRAWBERRY RUNNERS (FRAGARIA X ANANASSA DUCH.)
Article number
448_7
Pages
75 – 80
Language
Abstract
The effects of flower removal and runner nutrition on nutrient transfer and runner development were investigated in Parfaite mother plants, each linked by a stolon to a single runner plant.
The mother plants received 100 % Hoaglands (H) solution throughout the trial, whereas the runners received either 100 %H or 1 %H. The flower buds were removed from one set of treatments (non-bearing), but were allowed to develop normally on the remaining (bearing) plants.
Isotopically labelled P, Fe, Zn, Ca and S were supplied, to the mother or to the runner.
After 28d runner dry mass was greater in the 100 %H than in the 1 %H treatment, by 24 % in the bearing and 77 % in the non-bearing treatments.
Runner root development was relatively greater at the lower level of runner nutrition.
Flower removal and the supply of 1 %H to the runner led to vigorous vegetative growth by the mother.
Transfer of labelled elements was bidirectional.
Mean transfers of P, Fe, Ca, S and Zn were 13,9 %, 3,8 %, 3,8 %, 3,4 % and 2,2 %, respectively.
Transfer from mother to runner was favoured by the higher level of runner nutrition in both the bearing and the non-bearing treatments.
Transfer from runner to mother also tended to be favoured by 100 %H, but only in the non-bearing treatment.
In the bearing treatment transfer from mother to runner of all five elements was lower at the 100 %H than the 1 %H level of runner nutrition.
Flower retention, incremental levels of runner nutrition and stolon severance are recommended for strawberry multiplication beds.
The mother plants received 100 % Hoaglands (H) solution throughout the trial, whereas the runners received either 100 %H or 1 %H. The flower buds were removed from one set of treatments (non-bearing), but were allowed to develop normally on the remaining (bearing) plants.
Isotopically labelled P, Fe, Zn, Ca and S were supplied, to the mother or to the runner.
After 28d runner dry mass was greater in the 100 %H than in the 1 %H treatment, by 24 % in the bearing and 77 % in the non-bearing treatments.
Runner root development was relatively greater at the lower level of runner nutrition.
Flower removal and the supply of 1 %H to the runner led to vigorous vegetative growth by the mother.
Transfer of labelled elements was bidirectional.
Mean transfers of P, Fe, Ca, S and Zn were 13,9 %, 3,8 %, 3,8 %, 3,4 % and 2,2 %, respectively.
Transfer from mother to runner was favoured by the higher level of runner nutrition in both the bearing and the non-bearing treatments.
Transfer from runner to mother also tended to be favoured by 100 %H, but only in the non-bearing treatment.
In the bearing treatment transfer from mother to runner of all five elements was lower at the 100 %H than the 1 %H level of runner nutrition.
Flower retention, incremental levels of runner nutrition and stolon severance are recommended for strawberry multiplication beds.
Authors
J. Wooldridge, M.E. Joubert, J.H. Terblanche
Keywords
isotope, multiplication beds, nutrient transfer, propagation, runner production, stolon, strawberry
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