Estimation of the optimum cultivation date and susceptible growth satges to water stress for major areas of rain-fed wheat in Iran
Message:
Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:
Consideration to climate variables are the primary factors that controlling rainfed cultivation and the adaptation of the growing and reproductive period to the appropriate climate conditions provide through the sowing date. Therefore, the main objective of this research is to offer the time of the occurrence of water stress susceptible stages (flowering and milking) in order to achieve optimal yield in the main areas of rainfed wheat cultivation in Iran. Six western and northwest provinces of Iran are the first to sixth- largest in terms of area under cultivation and yield in rainfed wheat production, in this regard, it was used daily statistics of temperature and precipitation during (1998-2014) as well as soil texture data were used which had the appropriate coverage of the studied area (31 Stations).Firstly, it was offered a new definition of effective precipitation and determined sowing date and germination. Then, considering the degree-day of growth (1400-1700), the date of the beginning and the end of the flowering and milking stage was determined. The calculations were performed with SMADA software at three probability levels: 70, 80 and 90 percent, with choosing of the best statistical distribution. Accordingly, it was determined the time interval from 23 September to 27 October for germination and 2 periods between March 15th and April 15th and May 10th to June 10th for flowering and dying periods.
Language:
Persian
Published:
Journal of Water and Irrigation Management, Volume:8 Issue: 2, 2018
Pages:
267 to 287
magiran.com/p1970822  
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یک‌ساله به مبلغ 990,000ريال می‌توانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
  • حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران می‌شود.
  • پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانه‌های چاپی و دیجیتال را به کاربر نمی‌دهد.
دسترسی سراسری کاربران دانشگاه پیام نور!
اعضای هیئت علمی و دانشجویان دانشگاه پیام نور در سراسر کشور، در صورت ثبت نام با ایمیل دانشگاهی، تا پایان فروردین ماه 1403 به مقالات سایت دسترسی خواهند داشت!
In order to view content subscription is required

Personal subscription
Subscribe magiran.com for 50 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!