Results 21 to 30 of about 3,276 (165)

Reoccurrence of Dust Storms in South Asia and Their Implications for Vegetation Health 南亚沙尘暴的再次出现及其对植被健康的影响

open access: yesIntegrative Conservation, Volume 4, Issue 3, Page 362-380, September 2025.
Occurrences of dust storms and long‐distance movement of dust across landscapes is constantly increasing in south Asia. This dust is expected to have profound impact on vegetation health and sustainability as dust may contribute to nutrient budgets of the forest ecosystems, while it could impart various stresses to the plants.
Shree P. Pandey   +2 more
wiley   +1 more source

沙棘对辽宁西部杨树人工林土壤水分动态变化的影响研究

open access: yesShuitu Baochi Xuebao, 2004
通过将沙棘与小黑杨和欧美杨64号的人工林分别按株混和行混2种方式进行混交实验,研究了固氮植物沙棘对辽宁西部杨树人工林土壤水分动态变化的影响。研究结果表明:(1)在0~20 cm的表层土壤中,混交林的含水量均显著高于各自纯林的含水量(p9月>6月,不同月份间土壤含水量的差异大小随土壤深度、杨树品种、混交方式的变化而变化;(3)杨树人工林不同土层含水量与天然降水之间有明显的相关性(r~2>0.90),天然降水是杨树与沙棘混交林及杨树纯林土壤水分的主要来源。
赵广东 刘世荣 贾瑞 张振军 李学民
doaj   +2 more sources

塔里木河下游地下水位对柽柳叶绿素荧光特性的影响 [PDF]

open access: yes, 2010
选取塔里木河下游3处地下水埋深>6m的监测井位作为研究点,结合典型生态监测断面的地下水位监测数据,分析不同地下水埋深处柽柳的叶绿素荧光特性和光系统的光合活性.结果表明:随着地下水埋深加大和干旱胁迫加剧,柽柳叶片的实际光化学效率、电子传输速率和光化学猝灭等参数普遍下降;非光化学猝灭和调节性能量耗散量子产量等参数显著升高,而最大光量子产量总体处于相对适宜状态.干旱胁迫下柽柳的PSII光合活性随地下水埋深增大而下降,捕获光能的过剩程度加剧,发生光抑制的几率增大,其自身良好的抗旱性和自我调节机制 ...
朱成刚   +3 more
core  

Tree mycorrhizal associations regulate relationships between plant and microbial communities and soil organic carbon stocks at local scales in a temperate forest

open access: yesFunctional Ecology, Volume 39, Issue 6, Page 1550-1566, June 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Forests store substantial amounts of soil organic carbon (SOC), but SOC stocks differ strongly between forest ecosystems dominated by arbuscular mycorrhizal (AM) or ectomycorrhizal (EcM) fungi.
Mengxu Zhang   +10 more
wiley   +1 more source

季节性干旱区紫色土坡耕地土壤水分对降雨的响应

open access: yesShuitu Baochi Xuebao, 2020
以金沙江下游季节性干旱区紫色土坡耕地为研究对象,使用PR2/6土壤剖面水分测定仪和翻斗式雨量计对雨季0—100 cm土层的土壤含水量和降雨量进行连续观测,分析雨季紫色土土壤水分对降雨的响应。结果表明:每月平均土壤含水量之间存在显著差异,0—20 cm土壤含水率表现为9月 > 8月≈7月 > 6月,在整个雨季呈累加上升趋势。降雨量大小是影响土壤水分补给深度的决定因素。小雨(6.4 mm)只对10 cm土层土壤水分产生影响,平均提高12.35%;中雨(23 mm)对30 cm以上土层土壤水分产生影响,10 ...
徐露   +5 more
doaj  

塔里木沙漠公路防护林土壤微生物生物量与土壤环境因子的关系 [PDF]

open access: yes, 2009
为探讨极端干旱区风沙土土壤微生物与土壤环境因子的作用规律,采用相关分析法研究了塔里木沙漠公路防护林地土壤微生物生物量与理化因子和酶活性的关系.结果表明:土壤容重和粒径减小(R0.85)时,防护林地中土壤微生物数量和生物量有增大趋势,由容重与微生物量的相关性主导;土壤养分含量与土壤微生物数量和生物量呈正相关,主要由速效养分和放线菌、微生物生物量C、P的相关性所致;土壤酶活性与土壤微生物数量和生物量的相关性差异较大,R在0.51~0.91,主要取决于蔗糖酶、磷酸酶与放线菌、微生物量C的相关 ...
周宏伟   +7 more
core  

Changing plant phosphorus acquisition strategies in relation to altered soil phosphorus fractions after wetland drainage

open access: yesFunctional Ecology, Volume 38, Issue 11, Page 2433-2446, November 2024.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Plant phosphorus (P) acquisition strategy is considered to be an intrinsic driver behind plant succession. However, variations in plant P acquisition strategies in connection to soil P fraction changes after wetland drainage remain unclear.
Zhenhui Jiang   +6 more
wiley   +1 more source

Geographical Variation in Vegetative Growth and Sexual Reproduction of the Invasive Spartina alterniflora [PDF]

open access: yes, 2015
生物入侵是全球变化的重要内容,对全球经济和环境产生严重影响,并威胁生态系统的多样性。明确生物入侵发生的过程和机制可以有效地防控入侵生物带来的危害。繁殖是入侵种从定居到其后扩张过程中的一个重要的内在因素,进而可能影响入侵的成功。在入侵种扩散并占据广阔的地理分布区过程中,表型可塑性可能起到关键作用。揭示入侵种繁殖和表型可塑性在变异及其与环境因子的相关关系,对阐明外来物种的入侵机制和预测其分布具有重要的意义。互花米草原产美国大西洋沿岸和墨西哥湾,于1979年从美国引入中国。经过30多年的入侵和扩散 ...
刘文文
core  

湘中山地土壤线虫(Nematoda)生态地理群的研究 [PDF]

open access: yes, 1992
作者对湖南南岳衡山和长沙岳麓山土壤线虫进行了两年多的定位研究,共获得18511条土壤线虫标本.经分类鉴定,计有24个种 ...
伍惠生, 张友梅, 王振中
core  

Effects of PBAT on Soil Water and Salt in Maize Root Zone and Maize Yield in Saline-alkali Land [PDF]

open access: yes
[Objective] In order to reduce soil pollution caused by plastic film, the application effect of using PBAT fully biodegradable plastic film instead of ordinary PE plastic film combined with drip irrigation to grow maize in mild secondary salinized soil ...
HOU Jiana   +6 more
core   +1 more source

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