辽东山区次生林林窗大小对土壤微生物量碳、氮、磷的影响

发布时间：2018-07-12 18:50

本文选题：次生林 + 林窗大小　；参考：《生态学杂志》2017年11期

【摘要】：林窗干扰是次生林更新和演替过程的重要干扰类型,影响土壤的养分供应。为明确温带次生林林窗大小对土壤养分循环过程的影响,以辽东山区典型次生林内形成时间为6年的大、中、小(90~670 m~2)人工林窗为研究对象,测定了生长季不同大小林窗内0~20cm土层土壤微生物量碳、氮、磷。结果表明:与对照样地相比,大、中、小林窗0~10和10~20 cm土层土壤微生物量碳、微生物量磷、微生物量碳/全碳和微生物量磷/全磷无显著差异,且不同大小林窗间土壤微生物量碳、氮、磷以及微生物量碳/全碳、微生物量氮/全氮、微生物量磷/全磷均无显著差异。与对照样地相比,中林窗(290 m~2)10~20 cm土层土壤微生物量氮和微生物量氮/全氮显著升高,表明中林窗促进了10~20 cm土层土壤氮素的循环和有效氮素的供应。
[Abstract]:Canopy interference is an important type of disturbance in the regeneration and succession of secondary forest, which affects the nutrient supply of soil. In order to determine the effect of the gap size of temperate secondary forest on the soil nutrient cycling process, the large, middle and small (90,670mm2) plantations in the typical secondary forests in eastern Liaoning Province were studied. Soil microbial biomass carbon, nitrogen and phosphorus in 0~20cm soil layer in different growing season were measured. The results showed that there was no significant difference in soil microbial biomass carbon, microbial biomass phosphorus, microbial biomass carbon / total carbon and microbial biomass phosphorus in the soil layer of 10 cm and 10 ~ 20 cm between the large, medium and small trees. There was no significant difference in soil microbial biomass carbon, nitrogen, phosphorus, microbial biomass carbon / total carbon, microbial biomass nitrogen / total nitrogen, microbial biomass phosphorus / total phosphorus between different forest gaps. Soil microbial biomass nitrogen (microbial biomass nitrogen) and microbial biomass nitrogen (microbial biomass nitrogen) and microbial biomass nitrogen (microbial biomass nitrogen / total nitrogen) increased significantly in 1020 cm soil layer of middle forest window (290m ~ (2), which indicated that middle forest window promoted the circulation of soil nitrogen and the supply of available nitrogen in 10 ~ 20 cm soil layer.
【作者单位】：中国科学院森林生态与管理重点实验室(沈阳应用生态研究所);中国科学院清原森林生态系统观测研究站;中国科学院大学;
【基金】：国家自然科学基金项目(31330016)资助
【分类号】：S714.3

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