Ahmad Ahmadi; Farhang Ghasriani; Anvar Sanaei; Mina Bayat
Abstract
The purpose of this study was to determine the Evaluation of different cutting intensity on some attributes of Teucrium polium and Helichrysum globiferum Gharebagh key species. In this first region and two key area of half hectare in area Gharebagh and in the first year and was grazed, and fencing. Selected ...
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The purpose of this study was to determine the Evaluation of different cutting intensity on some attributes of Teucrium polium and Helichrysum globiferum Gharebagh key species. In this first region and two key area of half hectare in area Gharebagh and in the first year and was grazed, and fencing. Selected and removed from any of 0, 25, 50, 75% and control is exercised (a basic 10 treatments). Monthly by the clipper and the area is grazing season. Effective utilization of changes in the phenological characteristics, forage and seed production, vitality, mortality and other characteristics of selected plants species were studied. Finally, the combined analysis of data from yield and vigority with a split plot design in SAS software was analyzed. Results of studies of the effects on forage production and harvest of T. polium and H. globiferum Gharebagh species studied showed that effects of different levels, different years, and their interactions on the production level is a significant percentage (p<0.01). This shows that in different years with different weather conditions of production are different. The research findings can be taken as authorized by the 50% cutting intensity for the T. polium and 25% for H. globiferum are suitable.
Anvar Sanaei; Mohammadali Zare Chahouki; Esmaeil Alizadeh; Omid Asadi Nalivan
Abstract
The aim of this study was to evaluate the effects of grazing intensity around water resources on vegetation characteristics. For arrive this goal, three water points selected in the Silve watershed of Piranshahr rangelands. Around of each water point two regions with 0-150 and 150-300 meter intervals ...
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The aim of this study was to evaluate the effects of grazing intensity around water resources on vegetation characteristics. For arrive this goal, three water points selected in the Silve watershed of Piranshahr rangelands. Around of each water point two regions with 0-150 and 150-300 meter intervals separated. In the four geographical direction and in each distance, a 150 m transect established (total 12 transects), and along of each transect with 15 m intervals a 1 m 2 plot was placed (total 240 plots). Sampling was done with random-systematically method, the list of exist species, canopy coverage, percent of species composition class I, II, III and number of individuals per species were recorded for each plot. Analysis of the data in factorial on the base of complete randomized block design and to calculate diversity, richness and evenness with past software was done. The results showed that there is significant difference (p<0.01) in percentage composition of class I, II, III, annual, perennial plants and total canopy cover. The highest composition percentage and density of the species Br. tomentelus (1.48 and 4.35 respectively) and Fe. ovina (1.12 and 3.44 respectively) was observed. Between water points except annual species composition percentage in the other studied properties there are significant difference (p<0.01). Maximum amount of Shannon wiener and Margalef index there are in second distance of third water point and were 2.18 and 4.10 respectively. The Pielou evenness index was non-uniformly in both distance and three water points.
