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接种菌根菌对桉树生长的影响

, PP. 181-187

Keywords: 桉树,外生菌根菌,接种效应

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Abstract:

以尾叶桉和巨尾桉为材料, 1993和 1994年在广东省开平市镇海林场建立了 2个外生菌根菌接种试验, 均采用裂区设计, 4次重复, 每试验均 2个树种为主区, 菌根菌处理为副区。试验 1有 8个外生菌根菌处理, 每处理小区 6株或 9株, 试验 2有 3个外生菌根菌处理, 每处理小区 9株。造林后, 定期观测树高、地径或胸径。试验结果表明:树种内菌根菌效应分析发现, 巨尾桉所有指标在菌根菌间存在显著差异, 尾叶桉只是某些指标在菌根菌间有显著差异, 表明两树种对相同菌根菌处理的反应不同;树种联合方差分析表明, 试验 1中所有指标在区组间、树种间、菌根菌处理间均有显著差异, 从方差分量看, 树种效应 >树种×菌根菌互作效应或菌根菌效应;试验 2中树高指标在树种间和菌根菌处理间均存在显著差异, 而 2 4个月时胸径指标在树种间无显著差异, 但胸径在菌根菌处理间有极显著差异, 树高指标的方差分量为树种效应 >树种×菌根菌互作效应或菌根菌效应。胸径的方差分量为菌根菌效应 >树种×菌根菌互作效应 >树种效应。分析表明树种×菌根菌互作效应存在时间上的不稳定性;同时, 讨论了外生菌根菌应用中树种因素的重要性。

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