نتایج جستجو برای: crpsm cropsyst
تعداد نتایج: 78 فیلتر نتایج به سال:
چکیده آب منبعی محدود و در عین حال ضروری برای جوامع بشری و سیستم های اکولوژی وابسته به آن میباشد. با رشد جمعیت و توسعه اقتصادی در بسیاری از کشورها و مناطق جهان، این منبع باارزش به شکلی فزاینده روبه کاهش است. در چنین شرایطی، نیاز به افزایش بهرهوری آب محصول است.جهت بهینه سازی عملیات مدیریتی در محیط های متغیر از مدلهای گیاهی استفاده میشود. مدل بعنوان اب...
abstract the propose of this study was evaluation of cropsyst model on growth simulation and yield stimation of canola under different irrigation treatments. canola (talaye) was sown under 5 treatment and 4 replicants in completed randomized block designs at the college of agriculture, shiraz universityduring 2007-2008. during the growth season dry mass and lai was meseaured frequently, then mo...
crop simulation models are increasingly used in agriculture. these models help in saving time and expenses. the objective of this study was to evaluate cropsyst model in predicting development, growth and yield of wheat cultivars from golestan province. to do this, experimental data from different experiments were gathered for kohdasht, shiroodi, tajan and zagros. model performance in simulatin...
The potential effects of future climate change were investigated, corresponding to a doubling of atmospheric CO2 from 350 to 700 ppm, on agricultural production of four different cropping systems at two Italian locations, Modena and Foggia. Climate change scenarios, derived from two general circulation models (GCMs), were used as weather input to a soil-plant growth simulator, CropSyst. This mo...
In recent years, simulatiom modelling of yield has been the focus of attention for many researchers. Because, while reducing adminestrative costs, it can easily provide simulation models of different situations. In this study, while a subroutine on simulation of canola was added to CRPSM model, effect of different water treatments on canola was also investigated. In this research, canola (Talay...
The response of wheat crops to elevated CO2 (eCO2 ) was measured and modelled with the Australian Grains Free-Air CO2 Enrichment experiment, located at Horsham, Australia. Treatments included CO2 by water, N and temperature. The location represents a semi-arid environment with a seasonal VPD of around 0.5 kPa. Over 3 years, the observed mean biomass at anthesis and grain yield ranged from 4200 ...
به منظور بررسی اثر سطوح مختلف رطوبتی خاک و کود نیتروژن بر عملکرد، اجزای عملکرد و رشد برنج رقم هاشمی و ارزیابی دقت مدل شبیه ساز گیاهی cropsyst، آزمایشی در سال 1389 در گلخانه ی توری آموزشی و تحقیقاتی دانشکده علوم کشاورزی دانشگاه گیلان انجام گرفت. پنج سطح رطوبتی (غرقاب کامل، اشباع کامل، 85، 70 و 55 درصد درجه اشباع) و 4 سطح نیتروژن (صفر، 30،60 و 90 کیلوگرم در هکتار) با استفاده از آزمایش اسپیلیت پلا...
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