simulation model for a nomadic animal production system in southern iran

نویسندگان

gh. r. badjian

dahlan ismail

m. sh. othman

a.a. mehrabi

چکیده

the first motive for the determination and evaluation of an energy productionsystem is the need to change. such system is dynamic in nature and is influenced bymany factors such as age and physiological status of individual sheep or goat, quantityand quality of available feed and environment including the management systems.traditional pastoral resource assessments do not always account for the complex,interrelated nature of land, forage and livestock. modeling may overcome the limitationsof traditional methods by improving the understanding of complex pastoral systems, andmakes fast repetitive analyses, spanning time, incorporating variability and representingmore realistically complex interactions possible within the system. the estimated valuesof metabolisable energy for maintenance and production in this study are based on theresults of two feeding systems linked together by grazing the energy intake in thenomadic production system (nps) and the dynamic system modeling used to study theassessment of these complex systems. in this study, validation of model relied on theobservations of torki ghashghaii (tg) sheep (like those in bakkan) under pen-fed andintegrated rangeland-cropland feeding systems, and was carried out mainly by studyingthe body weight gain of growing animals and also body weight changes of ewes due topregnancy and lactation. after validation, the study indicated that the mean value ofactual data of male and female lambs (weaners) and ewes were in close agreement withthe simulated data. these results validate the generalized structure of energy utilizationmodels of grazing sheep under production sub- systems of nps. these results will enablethe prediction of carrying capacities in any given situation under conditions similar tothose in bakkan.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Simulation Model for a Nomadic Animal Production System in Southern Iran

The first motive for the determination and evaluation of an energy productionsystem is the need to change. Such system is dynamic in nature and is influenced bymany factors such as age and physiological status of individual sheep or goat, quantityand quality of available feed and environment including the management systems.Traditional pastoral resource assessments do not always account for the...

متن کامل

an application of equilibrium model for crude oil tanker ships insurance futures in iran

با توجه به تحریم های بین المملی علیه صنعت بیمه ایران امکان استفاده از بازارهای بین المملی بیمه ای برای نفتکش های ایرانی وجود ندارد. از طرفی از آنجایی که یکی از نوآوری های اخیر استفاده از بازارهای مالی به منظور ریسک های فاجعه آمیز می باشد. از اینرو در این پایان نامه سعی شده است با استفاده از این نوآوری ها با طراحی اوراق اختیارات راهی نو جهت بیمه گردن نفت کش های ایرانی ارائه نمود. از آنجایی که بر...

an appropriate model for exchange rate predictability in iran: comparing potential forecastability

nowadays in trade and economic issues, prediction is proposed as the most important branch of science. existence of effective variables, caused various sectors of the economic and business executives to prefer having mechanisms which can be used in their decisions. in recent years, several advances have led to various challenges in the science of forecasting. economical managers in various fi...

PREVALENCE OF HYDATIDOSIS IN NOMADIC TRIBES OF SOUTHERN IRAN

In order to assess the prevalence of Echinococcus granulosus (EO) infection (hydatidosis) in nomadic tribes of southern Iran, 1000 individuals from a total population of 1 12,519 were selected by randomized single blind cluster sampling method and studied from 1994- 1995. The study included: ( l ) a physical examination by a gastroenterologist, (2) abdominal ultrasonography (US), and (3) d...

متن کامل

a framework for identifying and prioritizing factors affecting customers’ online shopping behavior in iran

the purpose of this study is identifying effective factors which make customers shop online in iran and investigating the importance of discovered factors in online customers’ decision. in the identifying phase, to discover the factors affecting online shopping behavior of customers in iran, the derived reference model summarizing antecedents of online shopping proposed by change et al. was us...

15 صفحه اول

a time-series analysis of the demand for life insurance in iran

با توجه به تجزیه و تحلیل داده ها ما دریافتیم که سطح درامد و تعداد نمایندگیها باتقاضای بیمه عمر رابطه مستقیم دارند و نرخ بهره و بار تکفل با تقاضای بیمه عمر رابطه عکس دارند

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
journal of rangeland science

ناشر: islamic azad university, boroujerd branch

ISSN 2008-9996

دوره 1

شماره 3 2011

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023