WATER BALANCE MODEL FOR ESTIMATING FORAGE PRODUCTION IN STEPPIC REGION OF MARKAZI PROVINCE, IRAN

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EHSANI ALI; ARZANI HOSSEIN; FARAHPOUR MAHDI; AHMADI HASAN; JAFARI MOHAMMAD

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Journal: Journal of Range and Watershed Managment Year:2009 | Volume:62 | Issue:3 Page(s): 311-327

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Title

WATER BALANCE MODEL FOR ESTIMATING FORAGE PRODUCTION IN STEPPIC REGION OF MARKAZI PROVINCE, IRAN

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Keywords

LONG TERM PRODUCTION ESTIMATIONQ3

RAINFALLQ2

MOISTURE IN EARLY GROWING SEASONQ3

WATER BALANCE MODELQ3

SITE INDEX YIELDQ3

STEPPIC REGIONQ3

MARKAZI PROVINCEQ3

Abstract

Climatic data was used to create a Site Index through which long term forage production of rangelands could be predicted. The research was conducted on a site called Nemati in a 10 year period using WATER BALANCE MODEL. The production of four rangeland species, i.e. Artemisia sieberi, Salsola rigida, Noaea mucronata and Stipa barbata on Nemati were predicted using soil characteristics, RAINFALL, soil moisture and also plant characteristics based on ERHYM- II model in early growing season. Inputs were long term climatic data, soil characteristics, plant characteristics, MOISTURE IN EARLY GROWING SEASON and long term forage production. Outputs were evapotranspiration of major plants, their potential and actual evapotranspiration, RAINFALL, surface runoff, soil moisture, available moisture and climatic index. The analyses were done by Penman Montieth FAO (P.M.F) using Cropwat 8.0 software. The surface runoff in daily RAINFALL was analyzed by SCS (Soil Conservation Service) based on soil curve number. The results show that CN was 86 and runoff in growing season was 7 mm. The capacity of soil moisture was 58.90 mm/meter. This amount provides the situation for plant to use MOISTURE IN EARLY GROWING SEASON to 25.40 mm/meter. The amount of actual evapotranspiration in growing season was 1.36 times of average RAINFALL in growing season. According to drought conditions in 2000 this amount is twice more than RAINFALL in growing season. Mean of production index for forage estimation in Namati rangeland was estimated T/Tp=17%. In this regard, long term forage production and production in ten year period (weather yield site index) was 242 kg/ha, and equation used for prediction was Y=80.42+1.941(ETact).

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APA: Copy

EHSANI, ALI, ARZANI, HOSSEIN, FARAHPOUR, MAHDI, AHMADI, HASAN, & JAFARI, MOHAMMAD. (2009). WATER BALANCE MODEL FOR ESTIMATING FORAGE PRODUCTION IN STEPPIC REGION OF MARKAZI PROVINCE, IRAN. JOURNAL OF RANGE AND WATERSHED MANAGEMENT (IRANIAN JOURNAL OF NATURAL RESOURCES), 62(3), 311-327. SID. https://sid.ir/paper/162717/en

Vancouver: Copy

EHSANI ALI, ARZANI HOSSEIN, FARAHPOUR MAHDI, AHMADI HASAN, JAFARI MOHAMMAD. WATER BALANCE MODEL FOR ESTIMATING FORAGE PRODUCTION IN STEPPIC REGION OF MARKAZI PROVINCE, IRAN. JOURNAL OF RANGE AND WATERSHED MANAGEMENT (IRANIAN JOURNAL OF NATURAL RESOURCES)[Internet]. 2009;62(3):311-327. Available from: https://sid.ir/paper/162717/en

IEEE: Copy

ALI EHSANI, HOSSEIN ARZANI, MAHDI FARAHPOUR, HASAN AHMADI, and MOHAMMAD JAFARI, “WATER BALANCE MODEL FOR ESTIMATING FORAGE PRODUCTION IN STEPPIC REGION OF MARKAZI PROVINCE, IRAN,” JOURNAL OF RANGE AND WATERSHED MANAGEMENT (IRANIAN JOURNAL OF NATURAL RESOURCES), vol. 62, no. 3, pp. 311–327, 2009, [Online]. Available: https://sid.ir/paper/162717/en

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