CORRELATION BETWEEN ENVIRONMENTAL FACTORS AND NUMBER OF DAYS FROM NURSERY STAGE TO DORMANCY IN STRAWBERRY

J.R. Aspuria, Y. Fujime, N. Okuda, H. Suzuki, Y. Yoshida
The influence of environmental factors on vegetative growth in 4 strawberry cvs were investigated for 4 consecutive years (1988–1991). In petiole index, the number of days to dormancy significantly correlated to the mean and minimum air, plant and soil temperatures. Higher correlations were obtained following 80 days of subsequent growth which correspond to the onset of dormancy. Significant correlation to the minimum air temperature occurred as early as 10 days of subsequent growth. Highly significant was noted first when the minimum air temperature fall to 20°C. The integrated mean for air and soil temperatures influenced strongly the petiole index in ‘Donner’ and the T/R ratio index in ‘Nyoho’. November and December data on air, soil and plant temperatures gave higher correlations with the number of days to dormancy than those of September or October. Both T/R ratio and root growth index showed lower correlations among cultivars than did petiole length. These results indicate that the minimum and mean air, soil and plant temperatures were highly related in the regulation of dormancy in strawberry.
Aspuria, J.R., Fujime, Y., Okuda, N., Suzuki, H. and Yoshida, Y. (1992). CORRELATION BETWEEN ENVIRONMENTAL FACTORS AND NUMBER OF DAYS FROM NURSERY STAGE TO DORMANCY IN STRAWBERRY. Acta Hortic. 319, 341-352
DOI: 10.17660/ActaHortic.1992.319.53
https://doi.org/10.17660/ActaHortic.1992.319.53

Acta Horticulturae