نوع مقاله : علمی - پژوهشی
1 گروه مرتع و آبخیزداری، دانشکده منابع طبیعی و محیط زیست، دانشگاه بیرجند
2 استادیار، گروه مرتع و آبخیزداری، دانشکده منابع طبیعی و محیط زیست، دانشگاه بیرجند، بیرجند، ایران.
3 دانشکده منابع طبیعی و محیط زیست، دانشگاه بیرجند، بیرجند، ایران
4 ﮐﺎرﺷﻨﺎس ارشد آزﻣﺎﯾﺸﮕﺎه ﺧﺎﮐﺸﻨﺎﺳﯽ، دانشکده کشاورزی، داﻧﺸﮕﺎه بیرجند
عنوان مقاله [English]
This study aimed to investigate the effect of Rhus coriaria and Amygdalus scoparia plantation on some chemical properties of understory soil in rangelands of Kakhk region in Khorasan Razavi province. For this purpose, two regions including has been improved area and has not been improved area (control area) were determined. Treatments including understory soil of Rhus coriaria area, Amygdalus scoparia area and control area. Soil sampling by Random systematic method was performed at depths of 0-20 cm in understory soil from each area. The number of samples consisted of: 20 samples from restoration area and 10 samples from control area (30 samples). The soil chemical properties including EC, pH, nitrogen, organic matter, carbon, potassium, calcium, sodium, magnesium, sulfate, bicarbonate and chlorine were measured. In order to study the effect of Rhus coriaria and Amygdalus scoparia plantation on some chemical properties and determine the most effective soil factors, one-way Analysis of Variance (ANOVA) and Principal Components Analysis (PCA) were used respectively. The results of ANOVA showed that, the effect of plantation of Rhus coriaria and Amygdalus scoparia on all soil chemical properties (except pH) were significant (p≤0.01). The results of PCA showed that carbon-to-nitrogen ratio (C/Nratio), potassium and calcium, respectively, had the most effect on the vegetation cover of Rhus coriaria habitat. According to these results, the soil chemical properties from understory of Rhus coriaria (except chlorine and magnesium) were higher than understory of Amygdalus scoparia.