Results 31 to 40 of about 1,072 (106)
Shuitu Baochi Xuebao, 2006 采用田间采样及室内培养方法，对内蒙古武川县耕地、退耕还灌地和放牧草原3种类型土地土壤微生物各类群的数量分布和层化比率进行了研究。结果表明：在土壤耕作层（0～30cm）土壤微生物数量呈逐层下降趋势，3种类型土地的土壤微生物总数相差不大，3种类型土地土壤微生物层化比率存在明显差异。同时提出了土壤微生物层化比率的概念，并认为土壤微生物层化比率可能是一个比较好的指示动态土壤质量（土壤演替方向）的指标，当一个区域土壤微生物层化比率大于2时，土地一般不会发生退化现象。在研究的3块实验区域中，耕地存在较高的退化风险 ...
李涛 +4 more
doaj +2 more sources
Plant nutrient‐acquisition strategies contribute to species replacement during primary succession
Journal of Ecology, Volume 113, Issue 4, Page 988-1003, April 2025.Pioneer species Hippophae acquires phosphorus and nitrogen mainly by ‘mining’ and N2‐fixing strategies and thus dominates in the beginning of primary succession. As soil nutrient availability increases with the mobilization of apatite‐P and input of N‐rich plant residues, Hippophae' strategies become less efficient than Populus's scavenging strategies.
Xiao‐Long Li +12 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 为研究喀斯特高原峡谷石漠化治理区林草植被恢复对土壤团聚体的粒径分布，土壤结构稳定性及各粒径团聚体有机碳的影响，以期为喀斯特石漠化治理区土壤结构改善，植被重建，土壤碳库的维持与提高提供理论依据。以贵州喀斯特高原峡谷石漠化治理示范区5种常见林草植被（金银花、火龙果、花椒、荒草地和原生灌木林地）为研究对象，通过湿筛法对土壤团聚体粒径进行分组，对比分析5种林草植被模式下0-40 cm土层垂直剖面各土层土壤中团聚体和有机碳含量的分布规律。结果表明：在0-40 cm土层垂直剖面中，5种林草植被的土壤团聚体在>5，2~
王进 +5 more
doaj
Effects of Grass Cover on the Overland Soil Erosion Mechanism Under Simulated Rainfall
Water Resources Research, Volume 61, Issue 2, February 2025.Abstract Existing research on soil erosion primarily focuses on the individual effects of factors such as rainfall intensity, slope gradient, grass cover, and soil characteristics, with limited exploration of the interactions among these factors. This study investigated the mechanisms of soil erosion on overland covered with vegetation in the Loess ...
Mingwang Zhang +4 more
wiley +1 more source
不同土地利用方式对三江平原湿地土壤酶分布特征及相关肥力因子的影响
Shuitu Baochi Xuebao, 2007 以中国科学院三江平原湿地生态试验站为对象,研究了不同利用方式(湿地草甸、旱田系统、退耕成草、退耕成林)对土壤酶分布特征及相关肥力因子的影响.结果表明:土壤利用方式不同,土壤酶活性(转化酶、脲酶、磷酸酶和过氧化氢酶)、有机碳含量和土壤养分含量有较大差异.未开垦的湿地草甸,土壤酶活性、有机碳和土壤养分含量均为最高,开垦20年后,上述各种指标含量均有较大幅度降低;由耕地恢复为湿地后,土壤酶活性、有机碳和土壤养分含量有较大幅度的回升,而耕地恢复为林地后,上述各种成分也有不同程度地增加.因此 ...
王树起 +4 more
doaj
Functional Ecology, Volume 39, Issue 2, Page 621-634, February 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Tropical forests are generally characterized by high species diversity and low soil phosphorus (P) availability. Although tropical plants have evolved adaptations to low soil P availability, we know relatively little about the strategies of different groups of species ...
Yingxu Fan +11 more
wiley +1 more source
Shuitu Baochi Xuebao, 2005 土壤侵蚀预测预报的目的是为治理水土流失、合理利用土地资源而服务的,所以说土壤侵蚀的预测预报单元应落实到一个具体的土地利用生态地形面上。以黄土高原风蚀水蚀交错带的六道沟为研究区,基于土壤侵蚀的发生学原理,首先将各主要发生因子的图件数字化,并通过GPS对数字化图进行校正;然后,对地形条件、物质组成、土壤相三图件进行制图综合,生成流域侵蚀地块图;在此基础上,迭置土地利用类型图,在GIS平台上,生成土壤侵蚀预测最小单元图——生态地形面图。在每类生态单元内,系统分析土壤侵蚀发生的各环境要素,并确定其权重 ...
张丽萍 张登荣 张锐波 杨勤科
doaj +2 more sources
Functional Ecology, Volume 39, Issue 2, Page 635-652, February 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Invasive plants are a major cause of the global biodiversity crisis; it is therefore crucial to understand mechanisms that contribute to their success. South‐western Australia is a global biodiversity hotspot with extremely low soil phosphorus (P) concentrations.
Dan Tang +7 more
wiley +1 more source
Ecology and Evolution, Volume 14, Issue 12, December 2024.Greenhouse gas (GHG) emissions from soils play a significant role in contributing to global warming. Vegetation types especially affect soil GHG production. Our findings suggest that the restoration of natural grassland and artificial N‐fixing shrubland like Caragana korshinskii should be encouraged to alleviate GHG emissions, with the practical ...
Jihai Zhou +7 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 高原鼢鼠是青藏高原的优势地下啮齿动物，掘洞造丘是其独特的行为之一。高原鼢鼠新生土丘属于次生裸地容易导致水土流失，研究高原鼢鼠新生土丘水土流失对于合理评价其对生态系统的影响具有重要意义。利用径流小区法和风蚀桥法，测定不同地形（平地和坡地）、不同直径大小（大土丘：直径>75 cm，中等土丘：直径50~75 cm，小土丘 ...
马素洁 +8 more
doaj