Determine the effective factors in natural resources degradation and thaire share in the Isfahan Provience

• Main Authors: Ghaedi,Asghar, Ansari,Naser, Hoseini Abri,Hasan, Khodagholi,Morteza, Bagherzadeh, Karim, Ghanbari,Yousef, Mir Saeidi,Ali Reza
• Format: Publication
• Language: Persian
• Published: Isfahan(Iran) Isfahan Agricultural and Natural Resources Research Center
• Subjects: CONSERVACION DE LOS RECURSOS; CONSERVATION DES RESSOURCES; DEGRADACION; DEGRADATION; GESTION DES RESSOURCES NATURELLES; http://www.fao.org/aos/agrovoc#c_2159; http://www.fao.org/aos/agrovoc#c_3940; http://www.fao.org/aos/agrovoc#c_5091; http://www.fao.org/aos/agrovoc#c_5979; http://www.fao.org/aos/agrovoc#c_6523; http://www.fao.org/aos/agrovoc#c_9000115; IRAN ISLAMIC REPUBLIC; IRAN REPUBLICA ISLAMICA; IRAN REPUBLIQUE ISLAMIQUE; Isfahan (Province); NATURAL RESOURCES; NATURAL RESOURCES MANAGEMENT; ORDENACION DE RECURSOS NATURALES; PLANT RESOURCES; RECURSOS NATURALES; RECURSOS VEGETALES; RESOURCE CONSERVATION; RESSOURCE NATURELLE; RESSOURCE VEGETALE

Esfahan province area is nearly 105263 km2, 59 percent of it is rangeland. 8288118 animal unites are exist in Esfahan which are 4.36 times more than permitted animal unit in summer quarter rangeland s and 0.88 time more than permitted animal unit in winter quarter rangelands. Destruction of Esfahan rangelands are very awfully and in some cases it is unrecoverable and so many of forage species are going to extinct. First class plants have replaced with second and third class plants.Determining destructive factors and their affection on rangelands are very important for rangeland management. Sampling has carried out in 3 regions at semi arid area, 3 regions of steppe, 5 regions of semi steppe and 1 region in high mountain area. Topographic maps in 1:50000 scale, plotting, field surveys and questionnaire studies carried out and inputted in excel and analyzed with SPSS package. Main typic plants hn semi arid area were including: Ar-Si, Ha-Ar ,and Sedlitsia orientalis. Rangelands condition were poor to fair with steady ward tread .In this area the most important destractive factors was extra animal unite (80.36%)and the lowest important factor was long time grazing (9.77%) and other factors (1.66%). Main typic planty in step area including: As-Con, Sc-Eu, Ar-As, Ar-Sc, No-Co and Range condition is poor to very poor with down ward trend. Long time grazing (61.78%) and cultivation (1.56%) had the highest and the lowest effect on rangeland destruction respectively. In semi-steppe area As-Da, As-Ag, As-Sp, As-Co-No, Fe-As, Ar-As, As-Da-Ci and As-Er were the main typic plants. Range condition was poor to fair and rarely good with steady ward to down ward trend.Extra animal unit (64.44%) and longtime grazing (0.248%) had highest and the lowest effect on rangeland destruction respectively. In high mountains area As-Ag, Fe-As and As-Da-Ci were fair with down ward trend. Extra animal (43.85%), early grazing (36.38%), longtime grazing (17.35%), and cultivating on rangelands (2.16%) are the main factors on rangeland destruction. On the whole Esfahan province rangelands the most important factors are including: Extra animal unit (54.44%). Longtime grazing (16.28%), early grazing, (16.13%) kind of exploitation (7.49%), cultivation especially dry land farming (4.84%), and Building (0.005%) respectively. It is recommendet to decrease number of animal units in Esfahan rangelands because it is 2.8 times more than appropriate animal units Range management especially arrival and exit of animals, perserving of range seeding, changing low productive dry lands to forage cropland and substitution of heavy animals with lighter animals and changing native human behaviors.â__ There was a close relativily between number of animal and number of shepherds ( 0.01 % significant ) . There was a close relativily between forage decreasion index and animal unit increasing ( 0.01 % significant ) . There was a close relativily between forage decreasion and changing in lanl use. ( 0.01 % significant ) There was a close relativily between animal unit increasing and heavy grazing and premature in grazing. ( 0.01 % significant ) Bad management and animal unit increasing and number of shepherds. ( 0.01 % significant) Between range condition and indebteduess an inverse relativity was exist. ( 0.01 % significant)