Results 71 to 80 of about 467 (141)
Diagnosis and treatment for a case of Legionella longbeachae severe pneumonia and literature review. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue Ban, 2021 Feng S, Luo P, Huang S, Ou Z.
europepmc +1 more source
Shuitu Baochi Xuebao, 2008 对华南赤红壤丘陵坡地不同侵蚀部位土壤养分和微生物特性的变异性进行了对比分析。结果表明:水土流失对赤红壤丘陵坡地土壤pH、有机质、全氮、碱解氮、速效磷和速效钾都有较大的影响,而对全磷和全钾影响较小;随着土壤侵蚀程度的加剧和植被的破坏,土壤微生物总数逐渐减少,土壤基础呼吸和土壤诱导呼吸显著下降;在没有草本植物的情况下,仅有人工荷木并不能起到明显的水土保持作用,近地表覆盖的草本植物应是水土保持植被建设必不可少植物类群。
FENG, GUO, WEI, ZHANG, LI
doaj
Method Optimization for the Determination of Soil Organic Carbon and Its Components by Automatic Titrator [PDF]
The rapid and accurate detection of soil organic carbon and its components (such as particulate organic carbon and mineral-associated organic carbon) is of great significance because they are the key indicators reflecting soil quality.
Angang MING +5 more
core +1 more source
Shuitu Baochi Xuebao, 2008 通过对贵州西南部花江典型喀斯特峡谷区退化植被恢复过程中不同阶段及同一阶段不同小生境春季土壤呼吸速率进行了测定。结果表明,土壤呼吸速率随植被恢复过程逐渐提高 ...
邹军 +5 more
doaj
Characteristics and Influencing Factors of Soil CH4 and N2O Fluxes in Typical Broad-leaved Forests in the Yangtze River Delta Region, China [PDF]
[Objective] The forest coverage rate in the Yangtze River Delta region reaches 33.4%, and the underlying surface soil may have an important impact on the regional greenhouse gas budget.
CHEN Bingjiang +7 more
core +1 more source
Effects of Trifolium repens invasion on functional traits and turf quality of Poa pratensis [PDF]
[Objective] Invasion of Trifolium repens occupies the living space of turfgrasses and has been seriously threatening the quality and function of turfs. Examining the impact of T .
BAI Xiaoming +5 more
core +1 more source
Global Climate Change and Adaptive Management of Forest Ecosystem [PDF]
, 2014 人类活动所引起的温室效应及由此造成的全球气候变化对全球生态环境的影响正越来越引起人们的关注。森林作为全球陆地生态系统的一个重要组分,对全球气候变化的响应较为敏感。文中系统总结了全球气候变化对物种和森林类型分布、森林生态系统结构和物种组成、森林生产力、森林土壤碳氮循环和森林灾害等几个方面的影响,以及森林生态系统管理面临的挑战,在此基础上提出了适应未来气候变化的森林生态系统管理策略。Human-induced greenhouse effects and their impacts on global ...
卢昌义 +5 more
core
Research progress on the impact of antibiotics in groundwater systems on denitrification [PDF]
The microbial denitrification process is the most important form of nitrate-nitrogen removal in groundwater. The reclaimed water reuse and livestock breeding caused antibiotic pollution usually co-occurs with nitrate.
Fei LIU, Fuyang HUANG
core +1 more source
Shuitu Baochi Xuebao, 1993 在福建省连城县紫色土分布区设立临时标准地，研究了毛竹林，杂木林，马尾松林，黑荆－马尾松林等不同林型紫色土的酶活性和土壤肥力，结果表明：不同林型紫色土的酶活性，土壤呼吸作用强度均比光板地高，土壤养分状况亦比光板地好，尤其是集约经营的毛竹林，土壤肥力较高，结构性和抗蚀性也较好，从而对紫色土壤肥力的保持起到良好作用。Ｑ型群体分析表明，毛竹林土壤肥力较高，马尾松林，杂木林土壤肥力中等，黑荆－马尾松林 ...
杨玉盛 李振问
doaj +2 more sources
Shuitu Baochi Xuebao, 2008 研究了干旱区绿洲种植年限不同的3种苜蓿地0-10 cm,10-20 cm土层土壤微生物量碳、微生物量氮、微生物量商、呼吸强度和代谢商的变化特征。结果表明:在耕层0-20 cm范围内,苜蓿种植年限的长短对土壤微生物量碳、土壤微生物量氮含量有影响,相对来说微生物量碳、氮在四年生苜蓿地的含量最高,其次是一年生苜蓿地的。不同种植年限苜蓿地之间土壤微生物量商(qMB)、呼吸强度、代谢商(qCO2)差异显著,相对来说种植年限相差越大,差异越大。相关分析结果表明,土壤理化特性对土壤微生物活性有影响,其中土壤微生物量碳、
YANG, JIANG, ZHAI, YANG, JIANG
doaj