جستجوی مقالات مرتبط با کلیدواژه « دینامیک کاتیون‎های بازی » در نشریات گروه « محیط زیست »

The leaching from the surface of vegetation resulting from the complex relationship of soil and vegetation is an important part of the nutrition cycle that controls the ability of plants to access elements or the release of food from the ecosystem along with the decomposition process. Therefore, the aim of this study was to investigate the importance of trees leaching in the nutrient cycle (base cations) and introduce it as a vital nutrient source for improving soil fertility and sustainability of forest ecosystems.

This study is a review on published studies, a library and a comprehensive review of the literature, nationally and internationally.  

Leaching of nutrients from the canopy and forest floor with rapid absorption is an important factor of soil fertility and sustainability of ecosystems that should be considered in the forest management. Forest management and forest cover influence the nutrient quality and access in the soil and plants by erosion, litter quality, organic matter and nutrient cycling. For the forest management plan and marking, cut intensity, thinning and lightening intensity, additional information about the status and leaching intensity is required in any area to prevent the imbalance of the ecosystem with a comprehensive plan.

In fact, with sufficient information on the leaching function of different species and using in management, we can determine the correct combination in forestry and silviculture operations associated with soil fertility protection and increase of production potential.

Base cation leaching as a process affecting nutrient transport، has a key role in preventing of soil macro element loss (especially in poor soil) that varies result in interaction relations of soil، climate and biological activity over time. So the objective of this study was to investigate monthly variation of base cations (calcium، magnesium، sodium and potassium) of shallow (0-10 cm) and deep (10-50 cm) soil leaching in the mixed beech-hornbeam stand located in district one of Shastkolate forest، Golestan province. Samples of different layers of soil leaching were taken after each rain from 2008/12/21 to 2009/12/21 and were studied in the laboratory. To investigate the monthly variation of base cation leaching، we used one way variance analysis and for mean comparison we used Duncan''s test at the 95% level confidence. Result showed amounts of base cation leaching of soil layers in various months were different significantly. The least leached cation in shallow (in October) and deep soil (September، October and November) was for magnesium. Also the most leached cation in shallow soil was for potassium in August (8. 54 kg ha) and in deep soil was for calcium in December (6. 39 kg ha).