OALib Journal期刊
ISSN: 2333-9721
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浑善达克沙地油松树轮宽度与气候因子的关系
DOI: 10.3724/SP.J.1145.2012.00405, PP. 405-410
Keywords: 浑善达克沙地,油松,径级,温度,降水
Abstract:
为探讨不同径级油松对气候因子敏感度的差异,利用树木年轮学方法研究浑善达克沙地油松林40株油松样本建立的大径级(平均胸径34.5cm)和小径级(平均胸径15.5cm)油松的年轮宽度年表与气候因子的关系.结果表明:油松的平均敏感度与胸径大小呈线性负相关;不同径级油松的标准年表对气候因子的响应存在一致性,均表现为与春季温度正相关而与夏季温度负相关,并与降水呈正相关关系;其中与当年1~2月、当年9月的平均温度和最高温度呈显著正相关(p<0.05),与当年6月的平均温度和最高温度呈显著负相关(p<0.05);与当年1~2月和8~9月的最低温度呈显著正相关(p<0.05),与上年10月、当年5月和当年7月的降水呈显著正相关(p<0.05);同时,不同径级油松的标准年表对气候因子的响应还具有一定的差异性,即仅小径级油松表现为与当年6月的降水呈显著正相关(p<0.05),与当年7月的最高温度呈显著负相关(p<0.05).因此,利用树木生态学研究时应该考虑不同径级油松树轮年表对气候因子的响应差异.
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