Results 71 to 80 of about 1,049 (146)
Shuitu Baochi Xuebao, 2007 以植被演替空间序列代替时间序列的方法,在野外选取广西喀斯特地区4个主要植物群落演替阶段即草地、灌草地、灌丛、乔林的典型样地,对土壤物理、化学和生物学性状进行了比较研究,以探讨植被演替对土壤质量的影响。结果表明:不同的植被演替导致了土壤物理、化学和生物学性质的显著差异。随演替的正向进行,土壤综合肥力指标值(Q I)呈增长趋势,其土壤质量综合指数分别为:草地(0.09)、灌草地(0.16)、灌丛(0.61)、乔林(0.89)。自然植被的正向演替是提高土壤质量的有效途径 ...
王韵 +4 more
doaj +2 more sources
Shuitu Baochi Xuebao, 2022 中国南方丘陵区存在着自然过程和人类活动交互影响的、土地利用—土地覆盖叠加变化的多种土壤景观，其土壤质量对乡村农业产业发展具有重要影响。在南京市远郊的溧水区晶桥镇芝山村域小流域，选取流域内生态保护的林地、农业利用的园地、旱地和稻田4种土壤景观，于秋季分别采集表土样品，测定土壤基础理化性质、土壤团聚体粒径组成及土壤微生物磷脂肪酸和胞外酶活性分布，分析土壤肥力、土壤团聚化、土壤生物活性等关键性质在不同土壤景观中的变异情况，并采用土壤质量评价方法探明土壤景观与表土质量的变化关系。结果表明，与原生林地相比 ...
赵正 +13 more
doaj
Effects of Vegetation Restoration on Soil Infiltration and Runoff in the Gully Regions on the Loess Plateau [PDF]
[Objective] To study the effects of vegetation restoration on rainfall infiltration and runoff is of great theoretical and practical value for rational utilization of watershed water resources and ecological construction.
BAI Yungang +4 more
core +1 more source
Shuitu Baochi Xuebao, 2006 通过田间定位试验探讨了黄土高原旱地不同耕作措施下土壤有机碳的存在形式、转化过程以及有机碳各组分之间的关系。结果表明，免耕可以增加土壤有机碳含量，作物秸秆的保留与否主要影响土壤全碳（TOC）的变化。免耕秸秆覆盖（NTS）极显著提高了表层TOC含量，在干旱半干旱地区秸秆还田17个月就可使表层土壤TOC含量增加20．77％。传统耕作不覆盖（T）和传统耕作结合秸秆还田（TS）等耕作措施会破坏土壤结构，不利于土壤有机碳的积累。不同处理间的土壤焦磷酸钠提取态碳（SPPC）含量差异不显著 ...
逄蕾, 黄高宝
doaj +2 more sources
Shuitu Baochi Xuebao, 2008 以中亚带常绿阔叶林和杉木林为对照,对闽北典型竹林土壤微团聚体分形维数变化特征及其与土壤物理性质、化学性质、土壤酶活性及微生物数量的关系进行了研究,结果表明:>0.25 mm和0.05~0.01 mm颗粒含量越高,0.25~0.05 mm,0.005~0.001 ...
ZHANG Chang-shun +2 more
doaj
Shuitu Baochi Xuebao, 2020 为探究汾河临汾段湿地土壤及沉积物的理化性质、养分含量，评价土壤状况、预测水体的生态环境质量。共采集98个土壤及沉积物样本，分析了理化性质及养分等11项指标。结果表明：土壤pH在7.0~8.4，容重在1.04~1.44 g/cm3，含水率在5.9%~17.5%，电导率在0.167~0.747 mS/cm，质地类型包括壤黏土和黏壤土；有机质、全氮、全磷含量分别为8.7~39.8，0.354~1.046，0.389~1.444 g/kg，碱解氮、速效磷、速效钾含量分别为12.9~50.3，2.6~31.2 ...
次瑞敏, 王莉, 可宇娜
doaj
Distribution Pattern of Cadmium in the Profile of Shallow Fissure Soil and Its Influencing Factors in Karst Areas with High Geological Background [PDF]
[Objective] To study the vertical distribution pattern of cadmium (Cd) in shallow karst fissure soil, analyze the impacts of various factors on the distribution of Cd in fissures, and provide a scientific basis for future research on the distribution ...
CAI Huayin +6 more
core +1 more source
Near-natural ecological restoration in open-pit mine area [PDF]
Ecological restoration in open-pit mining areas faces some problems such as low self-sustaining capacity and high maintenance costs, especially obvious mining traces after restoration.
Jianan XIA +3 more
core +1 more source
Ecosystem Processes and Sustainable Management of Coastal Protection Forest of Casuarina equisetifolia [PDF]
, 2012 木麻黄为我国东南沿海防护林体系的主栽树种,如何维持和提高其环境调控功能成为当前沿海防护林经营的重要科学问题。文中概述了海岸带木麻黄林生态系统的物质循环、能量流动和防护功能以及育林措施对森林生态系统的影响等国内外研究成果,指出木麻黄人工林具有生产力高、光能利用率高和适应性强的特点;在探讨干扰与木麻黄林生态系统退化之间关系的基础上,提出加强木麻黄海岸防护林的恢复重建与生态系统管理等建议。Casuarina equisetifolia is a major species planted in ...
卢昌义 +5 more
core +1 more source
Construction of a landscape ecological network based on landscape ecological risk assessment: A case study of the resource-based city of Linfen [PDF]
The changes in the landscape structure within resource-dependent urban areas is influenced by a confluence of factors, potentially resulting in a decreased landscape ecological quality and a heightened ecological vulnerability.
Chenglong XU +3 more
core +1 more source