The effects of rangeland restoration treatments on some aspects of soil and vegetation parameters (Case study: Sirjan rangelands)

In order to valuation effects of rangeland improvemental practices on some parameters of soil and vegetation cover were studied (2005) in the rangelands of sirjan. In the study 4 improvemental practices include: enclosure, goorab (digging the land for water harvesting), alfalfa planting and Wheat grass planting were selected and next to every site that improvemental practices were done in it, sites were selected as controlled ones that were adjacent two by two. Vegetation cover sampling was done with 50 plots of 1m2 in every site by random systematic method and soil sampling after excavation and sampling from the depth of 0-30 and 30-60 cm of the soil were done. Vegetation cover and soil data was analyzed by means of software SPSS by using of paired t test and variance analysis (RCBD). Obtained results showed that improvemental practices done have had significant effect on increasing of canopy percentage, yield, vegetation density of I and II class and decreasing of III class vegetation (1% Level). The investigation of studied soil specification with t test showed that nutritive elements of nitrogen, phosphor, potassium and organic matter had significant difference between every treatment site and its controlled site (5% level). The results of variance Analysis of variation (ANOVA) about soil parameters in 2 depths investigated showed significant difference in OM/N/P/K and Ca% among 4 sites. In the total results of study showed that 4 improvemental practices done have had positive effect on vegetation cover and soil specification in the rangelands of sirjan region.