مرکز منطقه ای اطلاع رساني علوم و فناوري - The Effect of Different Improvement Methods on Botanical Composition of Secondary Succession Rangeland

Abstract :

In this study, the effects of pasture improvement methods on botanical composition considering family and species weights and soil covering rates were investigated in a secondary succesion rangeland. It was conducted between 2005 and 2008 in the Campus of Agriculture Faculty of 19 Mayis University. The experiment was laid out in a randomized complete block design with four replicates. The improvement methods whose effectiveness was tried to be figured out in the study were soil aeration, early cut, chemical fertilizer application; manure application, oversowing, combination of these treatments and control. Botanical composition was determined based on dry weight of species and transect methods. Species belonging to grasses were generally dominant in the study. Especially, the highest rates of grass species were found in the plots with treatments of chemical and manure fertilizer applications in 2006. Higher effect was found out in the plots with aeration + chemical fertilizer application. When control was compared to all the treatments including manure application and its combinations, legume content of the botanical composition of the plots decreased but grasses and species belonging to other families increased. The canopy cover rates dramatically increased from 2005 to 2006. However this increase level slightly decreased in further years depending on the treatments. The lowest canopy cover rate was found in control plots. It was also found out that both plant density and botanical composition of the species with high feed quality increased with the help of applied pasture improvement treatments at the end of the study.