Mohammad Jafari; Mohammad Tahmoures; Mohsen Naghiloo
Abstract
The purpose of this research is investigation of relationship between vegetation cover and soil characteristics and determination of the most important soil factor that effects on quantity variations and kinds of vegetation cover in the study area. The study area is located in west of Tehran province ...
Read More
The purpose of this research is investigation of relationship between vegetation cover and soil characteristics and determination of the most important soil factor that effects on quantity variations and kinds of vegetation cover in the study area. The study area is located in west of Tehran province and south eastern of Hashtgerd, next to Najm-abad village. After field study, the index vegetation types were selected and randomized-systematic sampling method has been used for soil and vegetation cover sampling in each of key area. The area of each plot was determined according to kind of plant species and species distribution using minimum area method. Some vegetation cover parameters such as canopy cover percentage, density and frequency of plant species were measured in the area. Then soil sampling were done from 2 horizon 0-10 cm and 10-30 cm in each plot and soil attributes such as texture, pH, organic carbon percentage and gypsum were measured in soil laboratory. Afterwards statistical methods like multivariate regression, analysis of variance and statistical techniques were used for analyzing of soil and vegetation cover data. Results showed that there is not any specific difference between soil and vegetation data except for gypsum. In other words the effective factor on vegetation cover variation was soil gypsum.
Masoomeh Abbasi Khalaki; Mohammad Jafary; Ali Tavili; mehdi moameri
Abstract
To find the effect of Atriplex canescens on soil chemical properties, two adjacent areas, each with and area of 1 ha, were selected in Hossein Abad Hapeshloo Shahryar. In one area it was planted Atriplex canescens in 2003 while the later one without Atriplex canescens was considered as control area. ...
Read More
To find the effect of Atriplex canescens on soil chemical properties, two adjacent areas, each with and area of 1 ha, were selected in Hossein Abad Hapeshloo Shahryar. In one area it was planted Atriplex canescens in 2003 while the later one without Atriplex canescens was considered as control area. To sample soil, random- systematic method was used along 3 transects with a length of 100 m. In planting site transects were established perpendicularly on furrows were while in control site they were established parallel. Along each transect, 3 profiles were dug in initiate, medium and end points of each transect under shrubs and samples were taken from two depths (0- 30 cm and > 30 cm). Then, soil characteristics including texture, pH, Ec, Lime (CaCo3), ESP, organic mater (OM) and elements of Na, K, Ca, Mg and N were measured in laboratory. The results of this study showed that pH and Mg were significantly reduced in planting site compared of control. In addition, Na, Mg, Lime and Ca were significantly increased in planting site in comparison to control.
mohsen Naghiloo; mohamad Jafari; mohamad Tahmoures; asghar Kohandel; farinaz Hamedanian
Volume 63, Issue 1 , June 2010, , Pages 119-11
Abstract
The purpose of this research was to investigate the relationship between vegetation cover and soil characteristics in order to determine the most important soil factors which affect on quantitative variations and types of vegetation cover in the study area. The study area is located in west of Tehran ...
Read More
The purpose of this research was to investigate the relationship between vegetation cover and soil characteristics in order to determine the most important soil factors which affect on quantitative variations and types of vegetation cover in the study area. The study area is located in west of Tehran province and southeast of Hashtgerd, next to Najm-abad village. After field studies, the index vegetation types were selected and randomized-systematic sampling method was used for soil and vegetation cover sampling in each key area. The area of each plot was determined according to type of plant species and their distribution using minimum area method. Some vegetation cover parameters such as canopy cover percentage, density and frequency of plant species were measured in the area. Then soil sampling were done from 2 horizons including 0-10 cm and 10-30 cm in each plot and soil attributes such as texture, pH, organic carbon percentage and gypsum were measured in the laboratory. Afterwards, statistical methods like multivariate regression, analysis of variance and RDA technique were used for analyzing soil and vegetation cover data. The results showed no specific difference between soil and vegetation data except for gypsum. In other word the effective factor on vegetation cover variation was soil gypsum.