نتایج جستجو برای: soil changes

تعداد نتایج: 1036843  

2014
Hui-Mei Wang Wen-Jie Wang Huanfeng Chen Zhonghua Zhang Zijun Mao Yuan-Gang Zu

Soil physic-chemical properties differ at different depths; however, differences in afforestation-induced temporal changes at different soil depths are seldom reported. By examining 19 parameters, the temporal changes and their interactions with soil depth in a large chronosequence dataset (159 plots; 636 profiles; 2544 samples) of larch plantations were checked by multivariate analysis of cova...

1999
K. Y. Chan N. R. Hulugalle

Changes in soil physical and chemical properties were evaluated in several on-farm studies located in rainfed, hardsetting red Al®sols (Ferric Luvisols) and in irrigated, self-mulching Vertisols (Chromic Vertisols) of eastern Australia. The objective of the studies was to evaluate changes in soil physical and chemical properties with time under commercial farming situations where changes had be...

Journal: :مرتع و آبخیزداری 0
مقداد جورغلامی دانشکده منابع طبیعی دانشگاه تهران، دکترای جنگلداری وحید ریزوندی دانشکده منابع طبیعی دانشگاه تهران، کارشناسی ارشد جنگلداری باریس مجنونیان قراقز دانشکده منابع طبیعی دانشگاه تهران، دکترای جنگلداری

assessment and management of the environmental impacts of forest harvesting operations have become increasingly critical factors in practicing commercial forestry. this study investigated soil disturbance from a forest logging system operation on an 8-hectare mixed broadleaved stand in compartment no. 309 in gorazbon district in kheyrud educational and research forest. the objective of this stu...

Journal: :Global change biology 2014
Zachary A Sylvain Diana H Wall Karie L Cherwin Debra P C Peters Lara G Reichmann Osvaldo E Sala

Climate change will result in reduced soil water availability in much of the world either due to changes in precipitation or increased temperature and evapotranspiration. How communities of mites and nematodes may respond to changes in moisture availability is not well known, yet these organisms play important roles in decomposition and nutrient cycling processes. We determined how communities ...

ژورنال: علوم آب و خاک 2019

The effects of climate change can be released from the surface to the soil depth, thereby affecting soil thermal regime. Thermal energy in the soil plays a very important role in causing climate changes. In this study, for the assessment and detection of  the climate changes, soil depths temperature, the measured data related to the  daily air temperature at a height of 2 meters (screen) during...

Journal: :Revista Brasileira de Ciência do Solo 2011

2011
M. Häkkinen

Changes in the soil carbon stock can potentially have a large influence on global carbon balance between terrestrial ecosystems and atmosphere. Since carbon sequestration of forest soils is influenced by human activities, reporting of the soil carbon pool is a compulsory part of the national greenhouse gas (GHG) inventories. Various soil carbon models are applied in GHG inventories, however, th...

2015
Hongtu Xie Jianwei Li Bin Zhang Lianfeng Wang Jingkuan Wang Hongbo He Xudong Zhang

Glomalin-related soil protein (GRSP) contributes to the formation and maintenance of soil aggregates, it is however remains unclear whether long-term intensive manure amendments alter soil aggregates stability and whether GRSP regulates these changes. Based on a three-decade long fertilization experiment in northeast China, this study examined the impact of long-term manure input on soil organi...

2014
Janet Chen Tamara J. Zelikova Elise Pendall Jack A. Morgan David G. Williams

Soil amino acids are often an important source of nitrogen (N) for plants, and anticipated global changes, including climate warming and rising atmospheric CO2 levels, have the potential to alter plant and microbial production and consumption of this N source in soils. We determined soil amino acid composition over a 1-year period at diurnal and seasonal time scales in a multi-factor global cha...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید