The effects of pruning,fertilizers, and organic amendments on lowbush blueberry production |
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Authors: | P R Warman |
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Institution: | (1) Chemistry-Soils Department, Nova Scotia Agricultural College, P.O. Box 550, B2N 5E3 Truro, Nova Scotia, Canada |
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Abstract: | A four-year field study was conducted on a Hebert gravelly sandy loam (pH 4.5) in Nova Scotia to assess the effects of pruning
management and seven fertility amendments on lowbush blueberry (Vaccinium augustifolium Ait) production (yield, above ground and root tissue composition) and soil fertility. Pruning by oil burning produced higher
fruit yields than flail mowing but burning had the opposite effect on the plant N content (with a lesser influence on above
ground Mn and Zn). None of the fertility treatments (chicken manure, dairy manure, swine manure, urea, sawdust, NPK, NPK+S+Lime+Micronutrients)
produced fruit yields significantly greater than the control. Treatments provided the equivalent of 50kg total N/ha/2-yr cycle.
Treatments influenced tissue N, P, K, Ca, Mg, B, Mn, Cu, Zn and Mo levels. In general, the three manure treatments produced
the highest levels of plant macronutrients; the urea treatment produced the lowest levels of plant nutrients. In most cases,
extractable levels of soil P, K, Ca and Mg were highly correlated with the plant tissue content of these elements. Overall,
the dairy manure treated soils were the highest in soil fertility. |
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Keywords: | animal manures fertilizer lowbush blueberry pruning soil fertility tissue composition |
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