氮磷沉降对森林土壤生化特性影响研究进展

发布时间：2018-04-10 12:51

本文选题：氮沉降 + 磷沉降　；参考：《世界林业研究》2017年02期

【摘要】：人类活动引起的氮磷沉降给土壤带来严重影响。外源性氮可以直接增加土壤全氮和碱解氮的含量,提高土壤磷的有效性,减少全磷含量;外源性磷可以促进树木对土壤氮的吸收,可能造成土壤全氮含量下降。外源性氮对微生物群落存在促进、抑制和没有影响3种情况。外源性磷通常可增加微生物生物量,改变原有的森林微生物群落组成;氮沉降可以提高、降低或无影响土壤酶的活性。氮磷沉降对不同土壤酶种类的影响效果各异。氮沉降的影响也与土壤深度及酶的种类有关。对磷沉降影响土壤酶的研究甚少。未来氮磷沉降的研究热点包括热带氮磷沉降、土壤氮磷比和氮磷沉降交互作用对土壤的影响,不同地形、森林类型、林龄条件下氮磷沉降的对比分析,生态系统中缓冲氮磷沉降作用的关键因子及全球气候变化下氮磷沉降对土壤的影响。
[Abstract]:The deposition of nitrogen and phosphorus caused by human activities has a serious effect on the soil.Exogenous nitrogen can directly increase the content of soil total nitrogen and alkali-hydrolyzed nitrogen, increase the availability of soil phosphorus and reduce the content of total phosphorus. Exogenous phosphorus can promote the absorption of soil nitrogen by trees, which may lead to the decrease of soil total nitrogen content.Exogenous nitrogen promoted, inhibited and did not affect the microbial community.Exogenous phosphorus can usually increase microbial biomass and change the composition of the original forest microbial community, and nitrogen deposition can increase, decrease or have no effect on soil enzyme activity.The effects of nitrogen and phosphorus deposition on different soil enzymes were different.The effect of nitrogen deposition was also related to soil depth and enzyme species.There is little research on the effect of phosphorus deposition on soil enzymes.The research focus of nitrogen and phosphorus deposition in the future includes tropical nitrogen and phosphorus deposition, the effects of soil nitrogen / phosphorus ratio and nitrogen and phosphorus deposition on soil, different topography, forest types, and comparative analysis of nitrogen and phosphorus deposition under forest age.The key factors of buffer nitrogen and phosphorus deposition in ecosystem and the effect of nitrogen and phosphorus deposition on soil under global climate change.
【作者单位】：华南农业大学林学与风景园林学院;
【基金】：中央财政林业科技推广示范项目“广东省生态公益林培育技术推广”(2015-GDTK-07)
【分类号】：S714

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