اراﺋﻪ ي ﻣﺪل ﺳﺎده ي ﭘﯿﺶ ﺑﯿﻨﯽ رﺷﺪ و ﻣﻘﺪار ﻣﺤﺼﻮل ﭼﻐﻨﺪرﻗﻨﺪ ﭘﺎﯾﯿﺰه ﺗﺤﺖ ﺷﺮاﯾﻂ ﻣﺨﺘﻠﻒ آﺑﯽ

Developing a simple model for predicting the growth and yield of autumn sugar beet under different water condition

ﭘﯿﺶ ﺑﯿﻨﯽ ﻣﻘﺪار ﻣﺤﺼﻮل ﻣﯽ ﺗﻮاﻧﺪ ﺑﻪ ﺑﺮﻧﺎﻣﻪ رﯾﺰان و ﺗﺼﻤﯿﻢ ﮔﯿﺮان ﮐﻤﮏ ﮐﺮده ﺗﺎ ﺳﯿﺎﺳـﺘﻬﺎي ﻣﻨﺎﺳـﺒﯽ را ﺑـﺮاي ﺑﻬﺒـﻮد ﺷـﺮاﯾﻂ ﮐﺸﺎورزي اﺗﺨﺎد ﮐﻨﻨﺪ. در ﭘﮋوﻫﺶ ﺣﺎﺿﺮﯾﮏ ﻣﺪل ﺳﺎده ي رﯾﺎﺿﯽ ﺑﺮاي ﭘﯿﺶ ﺑﯿﻨﯽ ﻣﻘﺪار ﻣﺤﺼﻮل ﭼﻐﻨﺪرﻗﻨﺪ ﭘـﺎﯾﯿﺰه در ﻣﻨﻄﻘـﻪ ﺧﻮزﺳﺘﺎن اراﺋﻪ ﺷﺪه اﺳﺖ. ﺟﻬـﺖ ارزﯾـﺎﺑﯽ ﻣـﺪل، از اﻃﻼﻋـﺎت آزﻣﺎﯾﺸـﺎت اﻧﺠـﺎم ﺷـﺪه در دو ﺳـﺎل 1382 و 1383 در ﻣﺮﮐـﺰ ﺗﺤﻘﯿﻘﺎت ﮐﺸﺎورزي ﺻﻔﯽ آﺑﺎد دزﻓﻮل اﺳﺘﻔﺎده ﺷﺪ. در اﯾﻦ ﭘﮋوﻫﺶ ﭘﻨﺞ ﺗﯿﻤﺎر ﻣﻘﺪار آب آﺑﯿﺎري ﺑﻪ روش ﻗﻄﺮه اي و ﺑـﺮ اﺳـﺎس درﺻﺪي از ﻧﯿﺎز آﺑﯽ ﮔﯿﺎه )25، 50، 75، 100 و 125 درﺻﺪ( و در ﻗﺎﻟﺐ ﻃﺮح آﻣﺎري ﮐﺮﺗﻬﺎي ﯾﮑﺒﺎر ﺧﺮد ﺷـﺪه ﺑـﺎ ﭼﻬـﺎر ﺗﮑـﺮار ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺖ. ﻧﺘﺎﯾﺞ ﺑﺪﺳﺖ آﻣﺪه ﻧﺸﺎن داد ﮐﻪ ﻣﺪل ﻗﺎدر اﺳﺖ ﻣﻘﺎدﯾﺮ ﻋﻤﻠﮑﺮد رﯾﺸـﻪ و ﻣﺤﺼـﻮل ﺷـﮑﺮ ﺳـﻔﯿﺪ را ﺑـﺎ دﻗﺖ ﺧﯿﻠﯽ ﺧﻮب ﺗﺨﻤﯿﻦ ﺑﺰﻧﺪ.

Predicting crop yields can help planners and decision makers adopt appropriate policies to improve agricultural conditions. In the present study a simple mathematical model is developed for predicting the growth and yield of autumn sugar beet crop in Khuzestan region. To evaluate the model, data of two years experiment that was conducted at Safi Abad Dezful Agricultural Research Center were used. In this study, five treatments of drip irrigation water based on percentage of water requirement (25, 50, 75, 100 and 125%) were studied in a split plot design with four replications. The results showed that the model was able to estimate the root yield and white sugar yield, accurately.