Houle Daniel, Duchesne Louis, Moore Jean-David, Laflèche Marc Richer, Ouimet Rock
Direction de la Recherche Forestière, Forêt Quebec, min. des Ressources Naturelles du Quebec, 2700 rue Einstein, Sainte-Foy, QC, Canada G1P 3W8.
J Environ Qual. 2002 Nov-Dec;31(6):1993-2000. doi: 10.2134/jeq2002.1993.
An evaluation of the impact of dolomitic lime [CaMg(CO3)2] on soils (five years after treatment) and sapwood chemistry (after four growing seasons) was realized for a Ca-deficient sugar maple stand at the lake Clair watershed. The effect on humus chemistry was significant: exchangeable Mg and Ca, effective acidity (EA), base saturation (BSe), pH, and effective cation exchange capacity (CECe) significantly increased, while exchangeable Fe significantly decreased. In the B horizon, liming increased exchangeable Ca, Mg, and Mn concentrations while decreasing other acid cations. No significant temporal trends in element concentrations in tree rings could be detected, although the lime treatment significantly changed the average xylem Mg and Mn concentrations as well as the average Mg/Mn and Ca/Mn ratios of the sapwood. The absence of temporal trends in rings from the last 20 yr implied a significant re-equilibration of elements through the sapwood. Significant relationships were found between averaged xylem Ca/Mn and Mg/Mn ratios and exchangeable humus Ca, Mg, Mn, Al, Fe, and H+ concentration, EA, CECe, and BSe, suggesting that the average xylem Ca/Mn and Mg/Mn ratios are strong indicators of the soil acid-base status.
对克莱尔湖流域一片缺钙的糖枫林施用白云石石灰[CaMg(CO₃)₂]后土壤（处理五年后）和边材化学性质（四个生长季节后）的影响进行了评估。对腐殖质化学性质的影响显著：可交换镁和钙、有效酸度（EA）、碱饱和度（BSe）、pH值和有效阳离子交换容量（CECe）显著增加，而可交换铁显著降低。在B层，施用石灰增加了可交换钙、镁和锰的浓度，同时降低了其他酸性阳离子的浓度。尽管石灰处理显著改变了边材的平均木质部镁和锰浓度以及平均镁/锰和钙/锰比率，但在树木年轮中未检测到元素浓度的显著时间趋势。过去20年树轮中没有时间趋势，这意味着元素通过边材进行了显著的重新平衡。在平均木质部钙/锰和镁/锰比率与可交换腐殖质钙、镁、锰、铝、铁和氢离子浓度、EA、CECe和BSe之间发现了显著关系，表明平均木质部钙/锰和镁/锰比率是土壤酸碱状况的有力指标。
