نتایج جستجو برای: phosphorus induces flowering and helps seed formation

تعداد نتایج: 16954625  

2002
Dean R. Williams Brad M. Potts Philip J. Smethurst

We examined the effects of nitrogen and phosphorus fertilizer and paclobutrazol on flowering precocity and abundance in Eucalyptus nitens Deane & Maid. Trials to test these effects consisted of a factorial nitrogen by phosphorus experiment replicated on two sites and factorial nitrogen by paclobutrazol experiments conducted separately on reproductively immature and reproductively mature trees. ...

2007
I-FANG SUN YU-YUN CHEN STEPHEN P. HUBBELL

1 The lowland dipterocarp forests of Southeast Asia exhibit interspecifically synchronized general flowering (GF) and mast fruiting at irregular multi-year intervals of 1 to 11 years. The predator satiation hypothesis (PSH) posits that GF events enhance seed survival by reducing the survival, reproduction and population sizes of seed predators between GF events, and then satiating the reduced s...

Journal: :علوم باغبانی ایران 0
مهدی حدادی نژاد استادیار، دانشگاه علوم کشاورزی و منابع طبیعی ساری حسین مرادی استادیار، دانشگاه علوم کشاورزی ومنابع طبیعی ساری

this study performed to evaluate genetic diversity of some wild and domesticated (unknown foreign cultivars) blackberries in sanru collection based on morphological traits. results showed high diversity for flowering, ripening time and fruit juice. wild genotypes showed significant differences in leaf, flower, thorn number, fruits and seed fresh weight compared to domesticated cultivars. based ...

Journal: :علوم گیاهان زراعی ایران 0
مراد محمدی دانشجوی کارشناسی ارشد پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج حسین مقدم استادیار پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج ناصر مجنون حسینی استاد پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج علی احمدی دانشیار پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج کاظم خاوازی استادیار مؤسسه تحقیقات خاک و آب

to evaluate the effect of drought stress, biofertilizer and chemical phosphorus fertilizer on yield and seed protein percentage of two lentil cultivars, an experiment was conducted in split factorial based on crbd design with 4 replications in research farm of university of tehran (karaj-iran) during 2009-10. the main factor including three irrigation levels (irrigation after 70, 90 and 130 mm ...

Bethlehem Melese Nigussie Dechassa

Objective: A field experiment was conducted in order to study the effect of phosphorus and manure application on agronomic performance and seed yield of groundnut. Methods: Factorial combination of two groundnut varieties (‘Werer 962’ and ‘Oldhale’), Three rates of phosphorus (0, 90 and 180 kg P2O5 ha-1) and three rates of manur...

2017
Ling-Na Chen Yong-Zhong Cui Khoon-Meng Wong De-Zhu Li Han-Qi Yang

An understanding of the breeding systems and pollination of agriculturally important plants is critical to germplasm improvement. Breeding system characteristics greatly influence the amount and spatial distribution of genetic variation within and amongst populations and influence the rarity and extinction vulnerability of plant species. Many woody bamboos have a long vegetative period (20-150 ...

2011
Cheng Yan Yan Wei Meilin Yang

Tamarix ramosissima has bi-seasonal flowering and fruit-setting characteristics. This study compared the morphology and germination characteristics of seeds from Tamarix ramosissima plants during the spring flowering period and the summer flowering period. The results are as follows: there is no significant difference in morphology, such as size and thousand-seed weight, between seeds from diff...

2015
Sandra Varga Ester Laaksonen Pirkko Siikamäki Minna-Maarit Kytöviita

Sex-differential plasticity (SDP) hypothesis suggests that since hermaphrodites gain fitness through both pollen and seed production they may have evolved a higher degree of plasticity in their reproductive strategy compared to females which achieve fitness only through seed production. SDP may explain the difference in seed production observed between sexes in gynodioecious species in response...

Journal: :تولید گیاهان زراعی 0

yield in most crops is resulted from a number of physiological processes which occurred during plant growth and development. these processes are realized at morphological, pheonological and physiological levels and often are controllded by many genes. in order to determine the effective of physiological traits onseed yield of soybean (glycine max l.) cultivars and their relationship with yield ...

Journal: :crop breeding journal 0
a. rezaeizad kermanshah agricultural and natural resources research and education center, agricultural research, education and extension organization (areeo), kermanshah, iran. h. shirani rad

drought causes significant reductions in crop productivity in many parts of the world, including iran. identifying genotypes tolerant to drought stress is therefore one of the foremost goals of crop breeding programs. this study investigated the effect of terminal drought stress on yield and yield components of new winter rapeseed lines, and identified new winter rapeseed lines tolerant to term...

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