Jahanbakhsh Teymuri Majnabadi; Parvin Ramak; vahid karimian
Abstract
The present research aims to investigate the effect of temporal succession on the biological operation of planting Haloxylon persicum on the functional characteristics of rangelands in Khaf County. Three rangelands in which H. persicum planting operations were performed at different ages of 10, 20 and ...
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The present research aims to investigate the effect of temporal succession on the biological operation of planting Haloxylon persicum on the functional characteristics of rangelands in Khaf County. Three rangelands in which H. persicum planting operations were performed at different ages of 10, 20 and 30 years, and the control area were selected. Sampling along 3 transects of 100 meters, located 10 meters apart, were measured and analyzed for each area and a total of 12 transects. Using the function analysis method, three characteristics of stability, infiltration and nutrient cycle were measured using 11 soil surface indexes. The results showed that there is a significant difference between the succession times for biological restoration from the functional point of view (P <0.01). The highest degree of stability and infiltration is related to the H. persicum range of 30 years old and the smallest of it belongs to the control area. There is a significant difference between the biological regeneration time of H. persicum planting and the control area in terms of nutrient cycle index (P <0.01). The highest levels of nutrients are related to the 30-year-old H. persicum, 20-year-old H. persicum, 10-year-old H. persicum, and the control area. In general, the results of the present study indicate positive biologic effects on the characteristics of the rangeland function, and these positive effects are evident in increasing the functional indexes over time.
H. Mohammadi; H. R. Karimzadeh; S. J. Khajeddin
Volume 62, Issue 1 , June 2009, , Pages 125-137
Abstract
Study of soil and plant relationships is nessesery for ecological- based and appropriate management. The objective of this study is to determine the influence of edaphic properties on Haloxylon persicum growth and also, indentifing growth limiting soil properties for saxaul. The study was performed through ...
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Study of soil and plant relationships is nessesery for ecological- based and appropriate management. The objective of this study is to determine the influence of edaphic properties on Haloxylon persicum growth and also, indentifing growth limiting soil properties for saxaul. The study was performed through the stratified random sampling and 3 sites were selected as follow: planted strong saxaul, planted weak saxaul, rangeland without saxaul. Then 6 samples of Haloxylon persiocum were selected in each region, meanwhile, plant parameters including canopy cover area, canopy cover perimeter, the smallest and the largest canopy cover diameter, average of canopy cover diameter, height, basal area and diameter were considered. Also, 9 profiles in sites were sampled and the followiong properties: pH, SP, EC, Ca+Mg, Cl-, CO3--,HCO3-, SO4--, gravel, CaCO3, CaSO4, organic matter, clay, silt, sand, available phosphorous, Na+, K+, CEC, SAR, ESP, PSS, PSW and TDS were measured. Ordination method was used for data analysis. Accordiong to the results, plant parameters have significant diffirences in saxaul sites with the same age. Soil physical characteristics including soil texture and chemical characteristics such as organic matter, available phosphorous, CEC, salinity, CaSO4 and CaCO3 content showed the highest influence on saxaul growth parameters.
