Growth and Carbon Partitioning in Cranberry Uprights as Influenced by Nitrogen Supply

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  • 1 University of Massachusetts Amherst, Cranberry Experiment Station, 1 State Bog. Road, P.O. Box 569, E. Wareham, MA 02538
  • 2 Washington State University, Irrigated Agriculture Research and Extension Center, 24106 N. Bunn Road., Prosser, WA 99350

Information on growth and carbon partitioning of cranberry uprights in response to soil N application is lacking. Therefore, two experiments were initiated on `Stevens' uprights to determine the effect of soil-applied N on tissue N, growth, net carbon exchange (NCER), and nonstructural carbohydrate production of uprights of `Stevens' cranberry. Tissue N concentration increased linearly with increasing soil N but was greater in vegetative uprights than in fruiting uprights. Current season growth on vegetative uprights was more responsive to tissue N than on fruiting uprights. Although chlorophyll concentration and NCER increased with increased soil N, upright starch concentration and often total nonstructural carbohydrate concentration decreased with increased soil N at midfruit development and preharvest, especially in vegetative uprights.

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