搜索结果: 1-12 共查到“国际动态 森林土壤学”相关记录12条 . 查询时间(4.762 秒)
中国林业科学研究院森林生态环境与自然保护研究所揭示了不同林龄马尾松人工林土壤有机碳来源及机制（图）
马尾松 人工林 土壤有机碳 来源
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2024/5/10
马尾松（Pinus massoniana）是我国特有的乡土树种，其凋落物残体的输入和降解对林龄增加的响应影响植物和微生物残体对土壤有机碳的贡献，但植物和微生物残体随林龄增加的变化模式和驱动机制仍不清晰。
林窗发生对土壤有机碳和养分动态影响取得新进展（图）
林窗发生 土壤有机碳 养分动态
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2024/5/16
林窗是指森林群落中由老龄树死亡或人为砍伐，在林冠层造成空隙的现象。局域尺度上的研究表明林窗发生影响土壤碳和养分的空间异质性，在森林演替和更新中起到重要的驱动作用。然而，在全球尺度上不同森林生态系统类型间土壤碳和养分含量对林窗发生的响应是否一致仍存在很大的不确定性。
通常认为随着树种丰富度增加能够提升土壤有机碳储量，然而有关树种组成变化对土壤有机碳储量和组成影响的研究较少。探明树种配置与土壤固碳之间的关系也是制定森林生态系统碳汇经营策略的重要理论基础。
中国科学院华南植物园在菌根真菌缓解酸化引起的磷限制研究获进展（图）
中国科学院华南植物园 菌根真菌 酸化 磷限制 Global Change Biology（IF=10.863） 酸雨
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2022/7/5
酸雨仍然是一个广泛存在的全球性环境问题。近几十年来，我国华南地区酸沉降持续升高，导致土壤酸化日益严重，这很可能会加剧区域森林生态系统磷限制。中科院华南植物园生态与环境科学研究中心博士研究生胡苑柳在邓琦研究员的指导下，基于鼎湖山季风常绿阔叶林为期10年的模拟野外酸沉降实验发现：1）土壤酸化会增加交换态 Al3+和 Fe3+和铁氧化物的活化度，推动不稳定磷库转变为闭蓄态磷库，从而降低土壤磷的有效性；2...
热带森林土壤具有较高的碳储量和固碳潜力，其中的微小变化也可能对全球碳循环产生影响。已有研究表明，华南热带地区具有湿季时间整体后移（湿季推迟，DW）和湿季降雨增加（湿季增雨，WW）的季节性降水变化趋势。然而，热带森林土壤碳循环过程对两种降水变化有何种响应尚不明确。
Tropical soil disturbance could be hidden source of carbon dioxide（图）
Tropical soil disturbance hidden source carbon dioxide
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2019/10/28
Thousand-year-old tropical soils unearthed by accelerating deforestation and agricultural land use could be unleashing carbon dioxide into the atmosphere, according to a new study by NSF-funded resear...
Carbon Feedback from Forest Soils will Accelerate Global Warming,26-Year Study Projects
Carbon Feedback Forest Soils Accelerate Global Warming 26-Year Study Projects
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2017/10/25
After 26 years, the world’s longest-running experiment to discover how warming temperatures affect forest soils has revealed a surprising, cyclical response: Soil warming stimulates periods of abundan...
Neutralizing acidic forest soils boosts tree growth,causes spike in nitrogen export
Neutralizing acidic soils tree growth causes spike nitrogen export
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2016/7/4
A legacy of acid rain has acidified forest soils throughout the northeastern US, lowering the growth rate of trees. In an attempt to mitigate this trend, in 1999 scientists added calcium to an experim...
Carbon Storage in Forest Soils Recovers Rapidly following Disturbance by Mass Wasting
Carbon Storage Forest Soils Mass Wasting
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2009/12/16
Soils comprise the largest non-marine carbon pool, exceeding that of the atmosphere and terrestrial biosphere combined. The high carbon storage potential of forest soils and the large area of forested...
Killing two birds with one stone: Transferring knowledge to fight poverty and land degradation（图）
gum arabic land
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2007/3/28
Rome, 5 March 2007 - With help from FAO, farmers in six sub-Saharan countries have been able to increase their income from the sale of gums and resins and to restore degraded land.
Global report cites progress in slowing forest losses
forest management biological diversity
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2007/3/28
13 March 2007, Rome – A number of regions of the world are reversing centuries of deforestation and are now showing an increase in forest area, according to FAO's State of the World’s Forests report, ...
Johanns Announces Conservation Agreement With Arkansas to Restore Forests and Wetlands for Wildlife
soil erosion tree forests
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2007/1/30
WASHINGTON, Jan. 29, 2007 -- Agriculture Secretary Mike Johanns today announced a $9.4 million conservation partnership with Arkansas Governor Mike Beebe to restore more than 6,000 acres of hardwood t...