نتایج جستجو برای: seedling parameters

تعداد نتایج: 592121  

Journal: :Bioresource technology 2003
Kassahun Embaye Lars Christersson Stig Ledin Martin Weih

Seedling emergence and subsequent survival and growth are vital for natural forest restoration or plantation establishment by means of seeds. Such information is lacking for the African bamboo species. Two experiments were carried out in a greenhouse to evaluate the influence of seed orientation and sowing depth of the lowland bamboo Oxytenanthera abyssinica on seedling emergence, survival and ...

Journal: :Journal of Seed Science 2021

Abstract: The use of computational tools has become notable in seed quality control to assist confirming lots higher potential. Thus, the aim this study was a approach investigate analysis morphological parameters that characterize primary root emergence evaluation tomato vigor. For purpose, five were analyzed for germination and vigor (seedling seedling images). A parallel made using computer-...

2001
GUILLERMO IBARRA-MANRÍQUEZ MIGUEL MARTÍNEZ RAMOS KEN OYAMA

Seedling morphology of 210 species (173 trees and 37 lianas) was studied from a community perspective to identify major patterns of seedling functional types in a Mexican rain forest. Five types of seedlings were distinguished: cryptocotylar with reserve storage or absorption cotyledons (epigeal [CER] and hypogeal [CHR]), phanerocotylar epigeal, either with photosynthetic cotyledons (PEF) or wi...

2017
Anpeng Zhang Chaolei Liu Guang Chen Kai Hong Yang Gao Peng Tian Youlin Peng Bin Zhang Banpu Ruan Hongzhen Jiang Longbiao Guo Qian Qian Zhenyu Gao

Seedling vigor is an important agricultural trait as direct-seeded rice technology becomes widely applied. In order to investigate the genetic mechanisms underlying seedling vigor in rice, seeds of 132 recombinant inbred lines (RILs) derived from 93-11 and PA64s, harvested from Lingshui and Hangzhou were cultivated in the nutrient solution, and four indices for seedling vigor were measured incl...

Journal: :علوم گیاهان زراعی ایران 0
ناهید جعفری دانشجوی سابق کارشناسی دانشکده کشاورزی دانشگاه گیلان مسعود اصفهانی دانشیار دانشکده کشاورزی دانشگاه گیلان عاطفه صبوری استادیار دانشکده کشاورزی دانشگاه گیلان

in order to evaluate the response of emergence rate of oil seed rape seedlings to temperature, a pot experiment was conducted to assess the relationship between emergence rate of three rape seed cultivars (apetalous flower, rgs003 and syn3) by using a non-linear regression against temperature variation. six models (tooth shape, segmented, beta, curve, quadratic and cubic) were used and the supe...

Journal: :بوم شناسی کشاورزی 0
آلاله متقیان همت اله پیردشتی محمدعلی بهمنیار

recently, increase in crop production depends on better seedling establishment, emergence rate and uniformity. thus, an experiment was carried out in a randomized complete block design with 8 fertilizer treatments and 4 replications in 2008 at sari agricultural sciences and natural resources university. the aim of this research was to evaluate effect of vermicompost (vc) on bush bean seedling e...

Journal: :journal of ornamental plants 2015
h. mahmoodzadeh m. nabavi h. kashefi

an investigation was initiated to examine the effects of nanoscale titanium dioxide particles on plant growth and development. in view of the widespread cultivation of canola in iran and in other parts of the globe and in view of the potential influence of titanium on its growth, this plant was chosen as the model system. canola seeds were separately treated with different concentrations of nan...

2006

INTRODUCTION In the southern United States, chemicals are an integral part of the management of bare-root nurseries. The rationale for using chemicals is based on economics as they can reduce hand labor, improve the use of valuable seed, and increase seedling performance. The cost of all chemicals associated with loblolly pine seedling production averages less than 0.2 cent per seedling. The co...

In order to investigate different treatment effects on germination in Gundelia tournefortii, three factorial experiments were carried out in the completely randomized design with three replications. The first factor was stratification at 4oC in three levels including 0, 3 and 6 weeks, the second factor was mechanical scarification in two levels including seeds with/without scarification and the...

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