برآورد بهره وري سه محصول گندم، جو و ذرت دانه اي در خرمشهر

Productivity estimation of three crops of wheat, barley and grain corn in Khorramshahr

ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ اﯾﻨﮑﻪ اﯾﺮان از ﺟﻤﻠﻪ ﮐﺸﻮرﻫﺎﯾﯽ اﺳﺖ ﮐﻪ در ﻣﻨﺎﻃﻖ ﺧﺸﮏ و ﻧﯿﻤﻪ ﺧﺸﮏ ﻗﺮار دارد و ﺑﺎ ﮐﻤﺒﻮد ﻣﻨﺎﺑﻊ آب رو ﺑﻪ رو اﺳﺖ ﺑﻪ ﻫﻤﯿﻦ دﻟﯿﻞ اﺳﺘﻔﺎده ﺑﻬﯿﻨﻪ از ﻣﻨﺎﺑﻊ آب در ﻣﺼﺎرف ﮐﺸﺎورزي، ﻣﻘﺎﺑﻠﻪ اي در ﺑﺮاﺑﺮ ﺧﺸﮑﺴﺎﻟﯽ ﺧﻮاﻫﺪ ﺑﻮد. ﻟﺬا ﻟﺰوم اﻋﻤﺎل ﺑﺮﻧﺎﻣﻪ رﯾﺰي دﻗﯿﻖ ﺗﺮي ﺑﺮاي اﺳﺘﻔﺎده ﺑﻬﯿﻨﻪ از ﻣﻨﺎﺑﻊ آب اﺣﺴﺎس ﻣﯽ ﺷﻮد. در اﯾﻦ ﺑﺮرﺳﯽ ﺿﻤﻦ ﻣﺮور ﺳﺎﯾﺮ ﻧﺘﺎﯾﺞ ﻣﻮﺟﻮد، ﻣﻘﺪار ﺷﺎﺧﺺ ﮐﺎراﯾﯽ ﻣﺼﺮف آب ﻏﻼت ﺑﺮاي ﻣﻨﻄﻘﻪ ﺧﺮﻣﺸﻬﺮ ﺗﻌﯿﯿﻦ و ﺑﺎ ﻣﻘﺪار ﻣﺘﻮﺳﻂ ﺟﻬﺎﻧﯽ ﺷﺎﺧﺺ ﮐﺎراﯾﯽ ﻣﺼﺮف آب ﺑﺮاي ﻏﻼت ﻣﻮرد ﻣﻘﺎﯾﺴﻪ ﻗﺮار ﮔﺮﻓﺖ. ﺑﺮ اﺳﺎس ﻧﺘﺎﯾﺞ ﺑﺪﺳﺖ آﻣﺪه، ﻣﯿﺰان ﻋﻤﻠﮑﺮد ﻣﺤﺼﻮل اوﻟﯿﻪ )ﮐﯿﻠﻮﮔﺮم( و ﻣﯿﺰان ﺣﺠﻢ آب ﻣﺼﺮﻓﯽ )ﻣﺘﺮﻣﮑﻌﺐ( ﺑﺮاي ﺗﻮﻟﯿﺪ ﻣﺤﺼﻮل، ﺗﻌﯿﯿﻦ ﺷﺪه و در ﻧﻬﺎﯾﺖ ﺷﺎﺧﺺ ﮐﺎراﯾﯽ ﻣﺼﺮف آب ﺑﺮاي ﺳﻪ ﻣﺤﺼﻮل ﮔﻨﺪم، ذرت و ﺟﻮ ﺿﻤﻦ اﺳﺘﻔﺎده از داده ﻫﺎي ﺳﻪ ﺳﺎل زراﻋﯽ 1388ﺗﺎ1390ﻣﺤﺎﺳﺒﻪ ﮔﺮدﯾﺪ. ﺑﺮ اﺳﺎس ﻧﺘﺎﯾﺞ ﺣﺎﺻﻠﻪ ﻣﺘﻮﺳﻂ ﻣﻘﺪار ﮐﺎراﯾﯽ ﻣﺼﺮف آب ﻣﺤﺼﻮﻻت زراﻋﯽ ﮔﻨﺪم، ﺟﻮ و ذرت داﻧﻪ اي ﺑﻪ ﺗﺮﺗﯿﺐ 1/07، 1/02و 1 /35ﮐﯿﻠﻮﮔﺮم ﻣﺤﺼﻮل ﺑﺮ ﻣﺘﺮ ﻣﮑﻌﺐ آب ﻣﺼﺮﻓﯽ ﺑﺪﺳﺖ آﻣﺪ

Iran is one of the countries that is located in arid and semi-arid regions and is facing a shortage of water resources; therefore, the optimal use of water resources for agricultural purposes will be a response to drought. Therefore, there is a need for more precise planning for the optimal use of water resources. In this study, while reviewing other available results, the value of grain water efficiency index for Khorramshahr region was determined and compared with the global average value of water efficiency index for cereals. Based on the obtained results, the yield of the primary crop (kg) and the volume of water consumption (cubic meters) for crop production have been determined, and finally the efficiency index of water consumption for the three crops of wheat, corn and barley using data from three crop years Calculated from 2009 to 2011. Based on the results, the average water use efficiency of wheat, barley and corn crops was 1.07, 1.02 and 1.35 kg / m3 of water consumption, respectively.