نتایج جستجو برای: spring frost

تعداد نتایج: 56164  

2014
Gilbert Neuner

This report provides a brief review of key findings related to frost resistance in alpine woody plant species, summarizes data on their frost resistance, highlights the importance of freeze avoidance mechanisms, and indicates areas of future research. Freezing temperatures are possible throughout the whole growing period in the alpine life zone. Frost severity, comprised of both intensity and d...

2015
Annette Menzel Raimund Helm Christian Zang

Damage by late spring frost is a risk deciduous trees have to cope with in order to optimize the length of their growing season. The timing of spring phenological development plays a crucial role, not only at the species level, but also at the population and individual level, since fresh new leaves are especially vulnerable. For the pronounced late spring frost in May 2011 in Germany, we studie...

Journal: :به نژادی نهال و بذر 0
محمد علی نجاتیان m. a. nejatian agricultural and natural resources research center of qazvin province, qazvin, iran.مرکز تحقیقات کشاورزی و منابع طبیعی استان قزوین

late spring frost usually damages flowers and reduces yield of almond trees. due to natural sexual reproduction, in most of almond orchards of qazvin province, iran, which have been established through seedling propagation, a vast genetic variation has been occurred. this situation has been provided many possibilities to study different traits of native almond genotypes, to select superior geno...

Journal: :The New phytologist 2008
Ingo Ensminger Lilian Schmidt Jon Lloyd

An earlier onset of photosynthesis in spring for boreal forest trees is predicted as the climate warms, yet the importance of soil vs air temperatures for spring recovery remains to be determined. Effects of various soil- and air-temperature conditions on spring recovery of photosynthesis in Scots pine (Pinus sylvestris) seedlings were assessed under controlled environmental conditions. Using w...

Journal: :Annals of botany 2004
Ilja Tom Prásil Pavla Prásilová Katerina Pánková

BACKGROUND AND AIMS Frost tolerance of wheat depends primarily upon a strong vernalization requirement, delaying the transition to the reproductive phase. The aim of the present study was to learn how saturation of the vernalization requirement and apical development stage are related to frost tolerance in wheat. METHODS 'Mironovskaya 808', a winter variety with a long vernalization requireme...

Journal: :international journal of agricultural science, research and technology in extension and education systems 2011
a, gandomkar

the quality of pressure distribution over the atmosphere of the sea level and geopotential altitude at different atmosphere layers affect on many climate and meteorology phenomena of the earth surface. one of the important meteorology phenomenon is the occurrence of frost phenomenon especially late spring frost. in this surrey, occurring late spring frost days and minimum temperature during the...

Journal: :Journal of experimental botany 2015
T M Frederiks J T Christopher M W Sutherland A K Borrell

Radiant frost is a significant production constraint to wheat (Triticum aestivum) and barley (Hordeum vulgare), particularly in regions where spring-habit cereals are grown through winter, maturing in spring. However, damage to winter-habit cereals in reproductive stages is also reported. Crops are particularly susceptible to frost once awns or spikes emerge from the protection of the flag leaf...

Journal: :Frontiers in Plant Science 2019

2017
H. Mehdipoor

Global warming has shifted the onset of spring plant phenology towards earlier dates. This shift can lead to “false springs” (plants get frost damage) because the date of last frost has not advanced at the same pace than the advancement of spring onset. Here, we use a cloud computing approach for processing big and high spatial resolution grids of temperature data to map the occurrence of false...

Journal: :علوم گیاهان زراعی ایران 0
شهریار ساسانی استادیار مرکز تحقیقات کشاورزی کرمانشاه رضا توکل افشاری استاد پردیس کشاورزی و منابع طبیعی دانشگاه تهران سیروس محفوظی دانشیار موسسه تحقیقات نهال و بذر کرج بن ترواسکیس استاد مرکز تحقیقات کشاورزی استرالیا

frost tolerance of winter wheat depends primarily on a strong vernalization requirement, delaying the transition to reproductive phase. the responses of four bread wheat cultivars (triticum aestivum l.) to low-temperatures were examined in controlled environment and field conditions. prolonged cold treatment accelerated the transition to reproductive development in winter wheats (cv. norstar an...

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