ISHS Acta Horticulturae 415: VIII International Asparagus Symposium
RELATIONSHIP BETWEEN SOIL TEMPERATURES AND SPRING ASPARAGUS SPEAR EMERGENCE IN COASTAL SOUTH CAROLINA |
| Author: | Robert J. Dufault |
| Abstract:
The soil temperature threshold modulating first spring emergence (FSE) of asparagus spears is unknown. The objectives of this five-year study were to document the relationships between first spear emergence and min/max soil temperatures (mMst) 15 cm deep and to determine an approximate soil temperature regime that first emergence can be expected to occur. ‘UC 157 F1’ seedlings were transplanted in 1986 and harvested from 1988 to 1992. The date of FSE varied as much as 49 days among the five-years and averaged 15 Feb. Average mMst's for 1988–1992 during the 14 day period before FSE were 11.0 ± 3.0 / 15.7 ± 2.7C. The average mMst derived from regression equations for one day before FSE were 12.7 and 17.7C, respectively. | |
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