نتایج جستجو برای: drought management

تعداد نتایج: 880686  

Journal: :BioMed research international 2016
Jing Ren Li Na Sun Qiu Yan Zhang Xing Shun Song

Cerasus humilis, grown in the northern areas of China, may experience water deficit during their life cycle, which induces oxidative stress. Our present study was conducted to evaluate the role of oxidative stress management in the leaves of two C. humilis genotypes, HR (drought resistant) and ND4 (drought susceptible), when subjected to a long-term soil drought (WS). The HR plants maintained l...

2016
Mohammad Azmi Jeffrey P. Walker

Drought and water stress monitoring plays an important role in the management of water resources, especially during periods of extreme climate conditions. Here, a data fusion-based drought index (DFDI) has been developed and analyzed for three different locations of varying land use and climate regimes in Australia. The proposed index comprehensively considers all types of drought through a sel...

2010

Frequent monitoring of stress levels in turfgrass is key to maintaining healthy turfgrass stands. Current methods used to monitor turfgrass for drought and salinity stress can be time consuming and expensive. This study was conducted to determine if data obtained from digital image analysis and spectroradiometry could accurately detect drought and salinity stress in hybrid bluegrass. Furthermor...

2011
H. R. MOUSSA H. R. Moussa

MOUSSA, H. R., 2011. Low dose of gamma irradiation enhanced drought tolerance in soybean. Bulg. J. Agric. Sci., 17: 63-72 Drought stress is the main limiting factor of soybean production. However, no work has been done on how application of low-dose of gamma rays could help to overcome water deficits during critical stages of soybean development. Gamma rays at doses 0.0 and 20 Gray (Gy), from a...

2003
PAUL HUMPHRIES DARREN S. BALDWIN

1. This paper introduces, and summarises the key messages of, a series of papers that emanated from a symposium on the Role of Drought in the Ecology of Aquatic Systems, held in Australia in 2001. 2. Defining drought hydrologically is problematic because the return times, intensity, duration and long-term trends in low-flow periods are specific to regions and times. Droughts may instead be refe...

2017
Syed A. Alam Jian-Guo Huang Kenneth J. Stadt Philip G. Comeau Andria Dawson Guillermo Gea-Izquierdo Tuomas Aakala Teemu Hölttä Timo Vesala Annikki Mäkelä Frank Berninger

Understanding the complex interactions of competition, climate warming-induced drought stress, and photosynthetic productivity on the radial growth of trees is central to linking climate change impacts on tree growth, stand structure and in general, forest productivity. Using a mixed modeling approach, a stand-level photosynthetic production model, climate, stand competition and tree-ring data ...

Journal: :Journal of experimental botany 2012
François Tardieu

Most traits associated with drought tolerance have a dual effect, positive in very severe scenarios and negative in milder scenarios, or the opposite trend. Their effects also depend on other climatic conditions such as evaporative demand or light, and on management practices. This is the case for processes associated with cell protection and with avoidance, but also for the maintenance of grow...

Journal: :اکو هیدرولوژی 0
یعقوب نیازی دانشجوی دکتری علوم و مهندسی آبخیزداری، دانشکدۀ منابع طبیعی، دانشگاه یزد علی طالبی دانشیار دانشکدۀ منابع طبیعی، دانشگاه یزد محمد حسین مختاری استادیار دانشکده منابع طبیعی، دانشگاه یزد مجید وظیفه دوست استادیار گروه مهندسی آب دانشگاه گیلان

monitoring and evolution of drought is the first step in any drought management system. in this study, evaluation of a new indexa new method is provided to monitor the severity of drought with remote sensing combined drought index (rcdi). the index is based on the fact that drought is a natural phenomenon caused by a combination of various factors such as a shortage in the amount of precipitati...

2017
Abdelghani Chakhchar Matthew Haworth Cherkaoui El Modafar Marco Lauteri Claudia Mattioni Said Wahbi Mauro Centritto

The argan tree (Argania spinosa) occurs in a restricted area of Southwestern Morocco characterized by low water availability and high evapotranspirative demand. Despite the adaptation of the argan tree to drought stress, the extent of the argan forest has declined markedly due to increased aridity, land use changes and the expansion of olive cultivation. The oil of the argan seed is used for co...

2014
Rachel Stubbington Andrew J. Boulton Sally Little Paul J. Wood

Droughts are unpredictable disturbances characterized in streams by declining flow, reduced habitat availability, and deteriorating abiotic conditions. Such events typically reduce benthic invertebrate taxon richness and modify assemblage composition, but little is known about how hyporheic invertebrate assemblages respond to drought or how these responses relate to changes in benthic assemblag...

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