辽东山地水源涵养林典型植被凋落物C、N、P溶出特征及其影响因素

生态学杂志

辽东山地水源涵养林典型植被凋落物C、N、P溶出特征及其影响因素

程志辉^1,2,李法云^1,2*,李海燕³,张营²,李霞²,林力涛⁴,孙学凯⁴

（¹湖南农业大学资源环境学院，长沙 410128；²辽宁大学环境学院，沈阳 110036；³辽宁老秃顶子国家级自然保护区抚顺管理局，辽宁抚顺 113208；⁴中国科学院沈阳应用生态研究所大青沟沙地生态实验站，沈阳 110016）

出版日期:2019-04-10 发布日期:2019-04-10

Characteristics of carbon, nitrogen and phosphorus leaching from litters of typical vegetation types in eastern Liaoning mountain water conservation forests and affecting factors.

CHENG Zhi-hui^1,2, LI Fa-yun^1,2*, LI Hai-yan³, ZHANG Ying², LI Xia², LIN Li-tao⁴, SUN Xue-kai⁴

(¹Collage of Resources and Environment, Hunan Agricultural University, Changsha 410128, China; ²School of Environmental Science, Liaoning University, Shenyang 110036, China; ³Fushun Authority of Liaoning Laotudingzi National Nature Reserve, Fushun 113208, Liaoning, China; ⁴Daqinggou Ecological Station, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China).

Online:2019-04-10 Published:2019-04-10

摘要/Abstract

摘要： 为揭示水源涵养林不同植被类型凋落物养分溶出特征及其影响因素，本文选取辽东山地太子河上游典型水源涵养林——槭树林、蒙古栎林、落叶松林和红松林为研究对象，探究不同植被类型凋落物碳、氮、磷养分溶出特征及pH、温度和时间等因素的影响。结果表明：凋落物养分溶出占干物质总质量的0.24%～1.28%，且不同植被类型凋落物养分溶出比例和溶出量存在显著差异（P<0.05）；凋落物养分溶出总量槭树林>红松林>蒙古栎林>落叶松林，槭树林凋落物TP溶出量（47.71 mg·kg^-1）相对较高，而落叶松林凋落物NO₃^--N（14.95 mg·kg^-1）和TN（82.50 mg·kg^-1）溶出量最低；pH下降增加了各植被类型凋落物TN和TP的溶出量，温度升高增加了凋落物DOC、TN和TP的溶出量，且不同植被类型凋落物NH₄⁺-N和NO₃^--N溶出最佳温度存在差异；凋落物养分溶出趋于平稳所需时间为12～24 h，蒙古栎林凋落物NH₄⁺-N和NO₃^--N和TN溶出趋于平稳所需时间多于其他植被类型，研究结果为深入理解凋落物养分溶出特征提供了依据。

关键词: 内生真菌, 多样性, 群落结构, 南方红豆杉, ITS

Abstract: To understand the characteristics of nutrient leaching of litter and its affecting factors in the water conservation forests, we investigated the leaching of litter C, N and P of typical forests (Acer mono, Quercus mongolica, Larix olgensis, and Pinus koraiensis forest) in the upper reaches of Taizi River, eastern Liaoning Mountain area and the effects of solution pH, temperature, and leaching time on it. The results showed that the total leaching amount of total C, N, and P accounted for 0.24%-1.28% of the dry mass and there were significant differences (P<0.05) in the leaching rate and leaching amount from litter among different vegetations, with the order on the leaching amount of Acer mono>Pinus koraiensis>Quercus mongolica>Larix olgensis. The TP leaching (47.71 mg·kg^-1) was higher in Acer mono litter than other species. There was the lowest NO₃^--N (14.95 mg·kg^-1) and TN release (82.50 mg·kg^-1) in Larix olgensis litter among the four vegetations. The litter TN and TP release was increased with decreasing pH value and the DOC, TN and TP release from litter was increased with rising temperature. The optimal temperature for the litter NH₄⁺-N and NO₃^--N release differed among four vegetation types. The time when leaching reached stable was 12-24 h, whereas Quercus mongolica litter took a longer time on NH₄⁺-N, NO₃^--N and TN leaching than the others. Our results provided a basis for better understanding the characteristics of nutrient leaching from litter.

Key words: endophytic fungi, diversity, community structure, Taxus chinensis var. mairei, ITS.

程志辉,李法云,李海燕,张营,李霞,林力涛,孙学凯. 辽东山地水源涵养林典型植被凋落物C、N、P溶出特征及其影响因素[J]. 生态学杂志.

CHENG Zhi-hui, LI Fa-yun, LI Hai-yan, ZHANG Ying, LI Xia, LIN Li-tao, SUN Xue-kai. Characteristics of carbon, nitrogen and phosphorus leaching from litters of typical vegetation types in eastern Liaoning mountain water conservation forests and affecting factors.[J]. cje.

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