Karışık baltalık ormanların sahil çamına dönüştürülmesinin toprak ve ölü örtüdeki organik karbon ve besin maddesi stoklarına etkisi

Abstract

In this study, the aim was to determine the effects of various practices on litter and soil properties by regenerating a mixed coppice forest into a coniferous forest, regenerating the same coniferous forest with the same species and clear-cutting a coppice forest for regenerating via coppicing. For this purpose, the study was conducted at Kerpe Research Forest (Kocaeli, Turkey), where reforestation with fast-growing species had been carried out. In the study, a total of 34 sample areas were worked on (10 plots each from old coppice stands (YY), 40-year-old 1st generation maritime pine (Pinus pinaster Aiton) reforestation (1NÇm) planted after clear-cutting of the old coppices and 10-year-old maritime pine plantations (2NÇm), where 1st generation of the aforementioned maritime pine reforestation was clear-cut; 4 plots from a 10-year-old young coppice stands (GY) growing after clear-cutting of the old coppices). It was determined that the amount of carbon and nutrient stocks in the litter were decreased significantly in 2NÇm and the differences within the 1NÇm plots did not close in the 10-year period. Although the organic carbon stocks in soil samples of 2NÇm were 31% higher than 1NÇm and the organic carbon stocks of GY were 28% higher than YY, these differences were not found to be statistically significant. The results of nitrogen stocks were similar as well. The phosphorus stocks of 2NÇm and GY were 73% and 71% lower than YY, respectively. They were determined to be statistically significant. No significant differences were detected between the K and Mg stocks, but the decreases were noted. As a result, it has been demonstrated that species change and 2nd generation reforestation practices affect carbon and nutrient stocks in litter and soils.