Diammonium phosphate corrects phosphate deficiency in lowbush blueberry.

摘要

Eight commercial lowbush blueberry (Vaccinium angustifolium) fields were treated with diammonium phosphate (DAP) at 0, 224 or 448 kg/ha to determine the effect on subsequent leaf nutrient concentration. Leaf samples taken in July 1991 showed an increased concentration of P with increasing rate of DAP, but leaf N was unaffected. Soil samples taken at the same time showed no significant increase in available P. Stems collected after leaf drop were longer and more branched with a larger number of flower buds when DAP was applied. There was a linear increase in yield with increasing rate of DAP.