نتایج جستجو برای: drought indices

تعداد نتایج: 112757  

Drought stress is one of the major abiotic stresses that limits rice productivity in the world. In this study 83 diverse rice genotypes were evaluated under reproductive-stage drought stress and non-stress conditions in a completely randomized design with three replications. Eleven well known stress tolerance and susceptibility indices were calculated based on the grain yield under stress and n...

2011
Mevlüt AKÇURA Sait ÇERI

The main objective of this research was to evaluate fourteen oat (Avena sativa L.) landraces and cultivars for drought tolerance using several indices. The trials were conducted both under rain-fed and irrigated conditions for three growing seasons (2001–2004) in two locations in the Central Anatolian Region of Turkey. Biplot analysis based on the Spearman’s rank correlation matrix revealed tha...

Drought is a major problematic phenomenon mostly for semi-arid areas of Iran. During drought periods, reduction in vegetation levels causes such problems as soil erosion, surface runoff, flood risk, etc. Therefore, the assessment of drought effects on plant covers is the most important issue. This research was conducted in 2015 using the extracted vegetation indices from Moderate Resolution Ima...

Journal: :پژوهش های کاربردی زراعی (زراعت سابق) 0
براتعلی فاخری دانشیار گروه اصلاح نباتات و بیوتکنولوژی- دانشکده کشاورزی - دانشگاه زابل میترا جباری دانشجوی دکترای اصلاح نباتات دانشگاه زابل سید مسعود ضیایی عضو هیأت علمی مجتمع آموزش عالی سراوان

in order to map the genomic regions affecting barley drought tolerance indices, an experiment was conducted at the agricultural and natural resource station of sistan. seventy tow double haploid lines of barley with their parents (steptoe and morex) were examined using two 9×9 simple lattice (stress and non-stress), with two replications. each plot consisted of six rows that were 3m in length a...

Journal: :Atmosphere 2022

Due to the lack of a general drought definition, water users and managers have developed used different indices. Many studies using indices been made so as detect events or just compare their results assess advantages disadvantages. In Portugal, these done for common indices; however, an integrated evaluation comparison recent data is needed. Therefore, this study intended give updated overview...

Journal: :international journal of advanced biological and biomedical research 2015
moein rezai akbar shabani shahram nakhjavan alireza zebarjadi

objective: in order to study genetic variation and effect of drought stress on grain yield and some morphological traits in chickpea, an experiment was conducted on 64 genotypes during 2013-2014 cropping season at deputy of kermanshah sararood dry land agricultural research institute, located on the western part of iran. methods: the experimental design was a randomized lattice design with tow ...

Journal: :desert 2013
a. nohegar m. heydarzadeh a. malekian

drought monitoring is a fundamental component of drought risk management. it is normally performed usingvarious drought indices that are effectively continuous functions of rainfall and other hydrometeorological variables.in many instances, drought indices are used for monitoring purposes. geostatistical methods allow the interpolationof spatially referenced data and the prediction of values fo...

Drought is one of the most important weather-induced phenomena which may have severe impacts on different areas such as agriculture, economy, energy production, and society. A number of drought indices have been introduced and used in various countries to date. In the current study, four meteorological drought indices including Percent of Normal Precipitation Index (PNPI), Standard Index of Ann...

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