Nutrient Availability and Foliar Nutrient Status of Sugar Maple Saplings following Fertilization
- D. Paré,
- W. L. Meyer and
- C. Camiré
Foliar analysis of maple sugar (Acer saccharum Marsh.) saplings having low foliar K (5.4 g kg−1) and P (1.2 g kg−1) was carried out for 3 yr to investigate the effects of a single application of fertilizer P triple superphosphate [TSP], K (K2SO4) and Ca [Ca(OH)2]. Also, soll, water-saturated soil extract, resin sacks buried in situ, and lysimeter solution analysis methods were used. Potassium and P additions significantly increased foliar K (1.81 g kg−1 increase) and P (0.25 g kg−1 increase) for the 3 yr that the observations were conducted. Calcium addition had no effect on foliar element concentrations. A Diagnosis and Recommendation Integrated System (DRIS) analysis corroborated the foliar analysis: K indices increased with increased K fertilization (from −47 to -23) and P indices increased with increased P fertilization (from -25 to −15). Calcium application significantly increased the effective cation-exchange capacity (CEC), exchangeable Ca and Mg and water-extractable Ca and decreased the acidity in the rooting zone for a 3-yr period. Conventional soil analysis and resin sacks detected significant effects of P and K fertilizers on their respective elements. However, these effects did not last more than 2 yr after fertilizer application in the surface soil horizon (Ah). Lysimeter solution analysis showed that K2SO4 fertilizer caused short-term increases in SO4 and Ca leaching. The duration of fertilizer P and K on foliar nutrition and the behavior of soil nutrients suggested that biochemical cycles are important mechanisms perpetuating fertilizer effects.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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