تحقیقات کاربردی علوم جغرافیایی

تحقیقات کاربردی علوم جغرافیایی

برآورد دمای پایه در مراحل مختلف رشد گندم دیم مطالعه موردی: ایستگاه سرارود کرمانشاه

نویسندگان
یوسف پارسامهر 1
حسین محمدی 2
فرامرز خوش اخلاق 3
سعید بازگیر 4
1 ب و هواشناسی کشاورزری
2 آب و هواشناسی کشاورزری
3 آب و هواشناسی سینوپتیک
4 هواشناسی کشاورزی
10.52547/jgs.22.64.17
چکیده
در این پژوهش به منظور بررسی دمای پایه (حداقل دما برای رشد گیاه) در درجه روزهای رشد (GDD) که یکی از پارامتر های مهم در محاسبه درجه روز رشد است، ابتدا داده­های مورد نیاز دوره آماری 2009-2017 محصول گندم در ایستگاه سرارود، از ایستگاه مربوطه اخذ شد. سپس بعد از مرتب کردن و جدا کردن مراحل مختلف رشد، با استفاده از 4 روش محاسبه دمای پایه (1- حداقل انحراف استاندارد در در جه روز SDgdd، 2- حداقل انحراف استاندارد در روزها SDday، 3- ضریب رگرسیون در روزها CRday، 4- ضریب تغییرات CV) مناسب ترین روش برای محاسبه دمای پایه رشد، در مراحل مختلف کاشت تا برداشت محصول گندم به دست آمد. نتایج نشان داد که مناسب ترین روش، حداقل انحراف استاندارد در GDD است که دمای پایه به ترتیب برای مراحل مختلف رشد از جوانه زنی تا رسیدن کامل 8/5، 38/0، 1، 8/2-، 56/0، 3/2، 3/7، 9/7، 8/6، 11 درجه سلسیوس به دست آمد. با مقایسه روش های مختلف محاسبه GDD، مناسب ترین روش، روش عمومی محاسبه درجه روز رشد به دلیل بیشترین مطابقت با داده های ایستگاهی شناخته شد. مقدار درجه روز رشد در مراحل مختلف بر اساس دمای پایه به دست آمده آن ها، محاسبه و نتایج نشان دادن که محاسبه دمای پایه در هر مرحله از رشد گندم پاییزه برای محاسبه GDD بسیار دقیق بوده و یک برآورد دقیق از GDD، حاصل شد.
کلیدواژه‌ها
دمای پایه
گندم پاییزه
درجه روزهای رشد
مراحل مختلف رشد
سرارود کرمانشاه

عنوان مقاله English

Estimation of base temperature in different growth stages of wheat Case study: Sararood Station of Kermanshah

نویسندگان English

yousof parsamehr 1
hosien mohammadi 2
faramarz khoshakhlagh 3
saied bazgeer 4
1 Agroclimatology
2 Agroclimatology
3 Synoptic climatology
4 AgroMeteorology
چکیده English

In this study, in order to study the base temperature (minimum temperature for plant growth) at the degree of growth day (GDD), which is one of the important parameters in calculating the degree of growth day, first, the data required for the 2009-2017 statistical period of wheat production at the station Sararood was taken from the station. Then, after sorting and separating growth different stages, using four methods of calculating the base temperature (1 - minimum standard deviation SDgdd day, 2 - minimum standard deviation SDAY days, 3 - regression coefficient per day CRday, 4 - CV coefficient of variation) was the most suitable method for calculating the base temperature of growth in different stages of planting to wheat harvesting. The results showed that the most suitable method is the minimum standard deviation in GDD, which The base temperature was obtained from germination to full reach for different growth stages, 5/8, 0/38, 1/8, 2/6, 0/63, 2, 3/7, 9/7, 8/6, 11 degrees Celsius. By comparing different methods of calculating GDD, the most appropriate of method was the general method of calculating the degree of growth day due to the most of similarity to the station data. The degree of growth day in different stages was calculated based on their base temperature and the results showed that the calculation of the base temperature at each stage of the growth of the wheat was very accurate for GDD calculation and a precise estimate of GDD was obtained.

کلیدواژه‌ها English

Base temperature
Autumn wheat
Degree of growth days
Different stages of growth
Sararood
Kermanshah
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