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OALib Journal期刊
ISSN: 2333-9721
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大气co2浓度和温度升高对岷江冷杉（abiesfaxoniana）幼苗针叶化学特性的影响
DOI: 10.3724/SP.J.1145.2012.01027, PP. 1027-1032
Keywords: 叶绿素,碳水化合物,化学元素,气候变化,co2倍增,增温,岷江冷杉
Abstract:
以6年生岷江冷杉（abiesfaxoniana）幼苗为研究对象，利用控制环境生长室进行了2个生长季的大气co2浓度倍增和增温（+2.2℃）处理，旨在探讨岷江冷杉幼苗针叶化学特性对co2浓度倍增和增温的响应.结果表明：大气co2浓度倍增对岷江冷杉幼苗针叶的叶绿素含量无显著影响，但降低了针叶n、p和纤维素含量，并增加了针叶可溶性糖和淀粉含量.增温显著降低了1年生针叶的叶绿素b含量，同时降低了当年生和1年生针叶的n、p和纤维素含量；显著提高了针叶的可溶性糖和淀粉含量.co2浓度倍增和增温同时作用显著增加了针叶叶绿素含量，但降低了针叶n、p和纤维素含量，而对针叶可溶性糖和淀粉含量无显著影响.大气co2浓度倍增和增温对针叶的叶绿素、n和碳水化合物含量有显著的交互作用.在大气co2浓度倍增和增温条件下，岷江冷杉针叶化学性质将发生改变，可能影响针叶的生物化学过程和凋落物分解.表3参40
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