نتایج جستجو برای: phenological growth stages

تعداد نتایج: 982540  

Journal: :iranian journal of applied animal science 2015
f. mirzaei aghjeh qheshlagh a. ghorbani a. mahdavi b. navidshad s. karamati jabehdar

this study was conducted to determine the chemical composition, metabolizable energy, digestibility and ability of gas production of poa trivialis. samples was collected at three phenological stages including: vegetative growth, flowering and seedling on two different elevations of 1300 to 1500 m and 2000 to 1800 m asl in neor and hir region as the first and second sites, respectively. testing ...

Journal: :مرتع و آبخیزداری 0
قادر کریمی استادیار پژوهشی، بخش تحقیقات مرتع، مؤسسه تحقیقات جنگل ها و مراتع کشور، ایران حسن یگانه استادیار، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، ایران حسن براتی کارشناس ارشد مرتعداری، دانشکده منابع طبیعی، دانشگاه تهران، ایران

rangelands have been composed of different plant species that emergence of phenological stages in every one of them will be influenced by environmental and genetic factors. in order to exploit the time and achieve acceptable performance in each plant species, it is necessary that the emergence of biological phenomena are recorded and studied. the objective of the present study is to survey the ...

The present study was conducted to identify nutritional value of Rumex obtusifolius in three phenological stages (vegetative growth, flowering, and maturity). Samples were randomly taken in pastures of Saravan in Rasht, Iran in 2015. After drying and grinding, the chemical compositions of Crude Protein (CP), Crude Fiber (CF), Ether Extract (EE), Total Ash (ASH), Neutral Detergent Fiber (NDF), a...

Studying plant phenology is very important to regulate the rangeland utilization. Plant phenology can be determined by Growing Degree Days (GDDs). Since temperature varies yearly, the phenological stages may consequently differ yearly. Determining the base temperature is one of the key steps in the calculation of GDDs. The aim of this study was to calculate the required GDDs for each phenologic...

Halophytes are plants that can grow in saline habitats and tolerate salinity through various ecophysiological mechanisms. Halophytes, compared to palatable and class I species, have less palatability; however, they have unique features, including that these plants are able to grow in conditions where both water and soil are saline. In other words, because of high resistance to salinity, halophy...

1999
Marcello Mastrorilli Nader Katerji Gianfranco Rana

The growth and production of sweet sorghum [Sorghum bicolor (L.) Moench] crops under semi-arid conditions in the Mediterranean environment of southern Italy are constrained by water stress. The effects of temporary water stress on growth and productivity of sweet sorghum were studied during three seasons at Rutigliano (Bari, Italy). The aim of this research was to evaluate the sensitivity of ph...

Determination of forage quality of plant species in natural habitats such as rangelands and deserts is one of the most important factors for grazing management of these ecosystems. For this purpose, the nutritional values of Calligonum comosum in three phenological stages (vegetative growth, flowering, and seedling) were determined in desert habitats located in the northeast of Kashan, Iran (in...

Journal: :علوم گیاهان زراعی ایران 0
علیجان بافکار دانشجوی دکتری گروه مهندسی آب دانشگاه شهید چمران اهواز سعید برومند نسب استاد گروه مهندسی آب دانشگاه شهید چمران اهواز مجید بهزاد استاد گروه مهندسی آب دانشگاه شهید چمران اهواز بهمن فرهادی بانسوله استادیار گروه مهندسی آب دانشگاه رازی، کرمانشاه

wofost is a crop growth simulation model which can simulate crop growth and yield components of annual crops dynamically in the various stages of growth period. some parts of the model outputs (crop yield and crop water requirements) can be used in irrigation planning and management of water resources. in this study, a field research was carried out in a randomized complete block design with th...

Journal: Journal of Nuts 2015
A. Mousavi M. Tatari R. Ali Mohamad

Regulated deficit irrigation (RDI) is commonly used during different phenological stages of fruit growth and development in almond trees to reduce the amount of irrigation water applied without or with only very small reductions in yield. Therefore, to study the effects of deficit and cutoff irrigation during different phenological stages of fruit growth and development in almond cv. “Mamaei” p...

2011
Juan M. Lopez-Sanchez Shane R. Cloude J. David Ballester-Berman

The polarimetric behaviour of rice fields at different phenological stages has been analysed by using time series of TerraSAR-X images. These are X-band copolar dual-pol images available for the whole growth cycle. As plants grow, changes in their morphology produce clear signatures in various polarimetric observables. Based on this sensitivity to phenology, a physically based retrieval approac...

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