Abstract
Dry weight accumulations (area basis) in new shoots, old leaves, woody stems, roots, and fruit of `Early Black' cranberry were determined seasonally for 1987 to 1989. The planting received 335 kg/ha of 10N-8.7P-8.3K per season, New shoot tissue accumulated dry mass at a rapid rate from late May until, late July, and again 1n the late summer (stem lignification). Root biomass was variable, declining and increasing in a cyclic pattern. Apparently, cranberry roots are short-lived. At times of declining biomass, many decaying roots were found in the samples. The pattern of biomass accumulation in roots was opposite that of shoots with shoot:root varying during the season from 0.12 to 0.55. Over the entire season, root biomass accounted for >60% of the total biomass per unit area of cranberry bog. At this location, fruit made up 10% of standing biomass at harvest. Changing fertilizer dose affected new shoot weight and length and fruit production, but the effect on root biomass was not significant in the 3 years of the study.
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