نتایج جستجو برای: afforestation

تعداد نتایج: 1463  

ژورنال: علوم آب و خاک 2016
ایمانی, فاطمه, بصیری, رضا, مرادی, مصطفی,

This study was done to evaluate the effect of afforestation in sand dunes at the vicinity of Shush, because of the importance of soil protection and wind erosion in sand dunes, also sand dunes afforestation as an effective and long lasting fixation mechanism. The study site was covered by petroleum mulch about 20 years ago and afforested by Prosopis juliflora. To study the effects of afforestat...

2015
Sheng-wei Shi Peng-fei Han Ping Zhang Fan Ding Cheng-lin Ma

Afforestation, the conversion of non-forested land into forest, is widespread in China. However, the dynamics of soil organic carbon (SOC) after afforestation are not well understood, especially in plateau climate zones. For a total of 48 shrub- and/or tree-dominated afforestation sites on the Qinghai Plateau, Northwestern China, post-afforestation changes in SOC, total nitrogen (TN), the carbo...

Journal: :The New phytologist 2012
Dejun Li Shuli Niu Yiqi Luo

• Afforestation has been proposed as an effective method of carbon (C) sequestration; however, the magnitude and direction of soil carbon accumulation following afforestation and its regulation by soil nitrogen (N) dynamics are still not well understood. • We synthesized the results from 292 sites and carried out a meta-analysis to evaluate the dynamics of soil C and N stocks following afforest...

Journal: :تحقیقات جغرافیایی 0
محمد اکبریان دانشگاه هرمزگان احمد نوحه گر دانشگاه تهران

aeolian landforms are very sensitive to wind erosion. afforestation of degraded sandy land soils is regarded the most effective strategy against wind erosion. the aim of this study is to estimate decreasing in wind erosion rate by afforestation of these landforms. in this research, geomorphological areas have been used as homogeneous units. research data are including scores of petrology, terra...

2013
Qi Deng Xiaoli Cheng Yuanhe Yang Quanfa Zhang Yiqi Luo

We conducted a field study in Danjiangkou Reservoir region of central China to evaluate soil C and N dynamics following afforestation by comparing soil organic C and N (SOC and SON), soil net N mineralization and nitrification, and inorganic N concentrations in the plant rhizosphere and open areas in the forest, shrubland and adjacent cropland. Afforestation increased SOC but did not significan...

2012
GUANG-SHAN CHEN MICHAEL NOTARO ZHENGYU LIU YONGQIANG LIU

Afforestation has been proposed as a climate change mitigation strategy by sequestrating atmospheric carbon dioxide. With the goal of increasing carbon sequestration, a Congressional project has been planned to afforest about 18 million acres by 2020 in the Southeast United States (SEUS), the Great Lake states, and the Corn Belt states. However, biophysical feedbacks of afforestation have the p...

2016
Yitong Yao Xuhui Wang Zhenzhong Zeng Yongwen Liu Shushi Peng Zaichun Zhu Shilong Piao

Widespread afforestation programs sequester carbon from the atmosphere and mitigate the rising of atmospheric carbon dioxide (CO2). Meanwhile, afforestation carbon sequestration may cost soil water. However, changes in soil moisture content (SMC) after large-scale afforestation or reforestation have rarely been quantified. In this study, we measured changes in SMC following afforestation using ...

2016
Ciprian Palaghianu

Romania's forest cover is at this time below, but quite close to the European average. Despite that, recent forestry activities tend to be more oriented towards forest exploitation and not to increase the national forested area. The general public perception is that afforestation activities are limited only to NGO’s projects and media actions and numerous reports and statements made by some of ...

Journal: :Ecological applications : a publication of the Ecological Society of America 2009
Sean T Berthrong Esteban G Jobbágy Robert B Jackson

Afforestation, the conversion of non-forested lands to forest plantations, can sequester atmospheric carbon dioxide, but the rapid growth and harvesting of biomass may deplete nutrients and degrade soils if managed improperly. The goal of this study is to evaluate how afforestation affects mineral soil quality, including pH, sodium, exchangeable cations, organic carbon, and nitrogen, and to exa...

2011
Michael Bredemeier

1. Definitions of terms 2. The particular features of forests among terrestrial ecosystems 3. Ecosystem level effects of afforestation and reforestation 4. Effects on biodiversity 5. Arguments for plantations 6. Political goals of afforestation and reforestation 7. Reforestation problems 8. Afforestation on a global scale 9. Planting techniques 10. Case studies of selected regions and countries...

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