نتایج جستجو برای: leaf area

تعداد نتایج: 658282  

2015
Dryw A. Jones Kevin L. O’Hara John J. Battles Rolf F. Gersonde Eric J. Jokela

Prediction of projected tree leaf area using allometric relationships with sapwood cross-sectional area is common in treeand stand-level production studies. Measuring sapwood is difficult and often requires destructive sampling. This study tested multiple leaf area prediction models across seven diverse conifer species in the Sierra Nevada of California. The best-fit whole tree leaf area predic...

Journal: :international journal of horticultural science and technology 2014
mohamadreza zokaee-khosroshahi mahmoud esna-ashari ahmad ershadi ali imani

this study was undertaken to identify morphological changes in young seedlings of 5 iranian almond species (prunus dulcis, p. eburnea, p. eleagnifolia, p. haussknechti, and p. scoparia) under polyethylene glycol-induced drought stress. drought stress caused a significant reduction in plant growth parameters such as fresh and dry weights of plant organs, leaf number, total leaf area, and leaf re...

2014
Hsien Ming Easlon Arnold J. Bloom

UNLABELLED PREMISE OF THE STUDY Measurement of leaf areas from digital photographs has traditionally required significant user input unless backgrounds are carefully masked. Easy Leaf Area was developed to batch process hundreds of Arabidopsis rosette images in minutes, removing background artifacts and saving results to a spreadsheet-ready CSV file. • METHODS AND RESULTS Easy Leaf Area us...

2009
Y. Yang S.-H. Kim B. Quebedeaux

An exponential decay function was fitted with literature data to describe the decrease in corn leaf expansion rate as predawn leaf water potential decreases. The fitted functionwas then applied tomodify an existing leaf area simulation module in a soil–plant–atmosphere continuum corn simulation model (MaizSim) in order to simulate leaf area of corn plants at different water status. Data were co...

2015
Dongliang Xiong Jia Chen Tingting Yu Wanlin Gao Xiaoxia Ling Yong Li Shaobing Peng Jianliang Huang

Chlorophyll meters are widely used to guide nitrogen (N) management by monitoring leaf N status in agricultural systems, but the effects of environmental factors and leaf characteristics on leaf N estimations are still unclear. In the present study, we estimated the relationships among SPAD readings, chlorophyll content and leaf N content per leaf area for seven species grown in multiple enviro...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم کشاورزی و منابع طبیعی گرگان - دانشکده علوم کشاورزی 1387

اطلاعات کمی زیادی در مورد توسعه سطح برگ در گیاه گندم وجود ندارد به منظور کمی سازی تولید و زوال برگ در گیاه کندم آزمایشی به صورت فاکتوریل در قالب طرح بلوک های کامل تصادفی در چهار تکرار در مزرعه تحقیقاتی دانشکده علوم زراعی دانشگاه علوم کشاورزی و منابع طبیعی گرگان در سال 1385 اجرا گردید. تیمارهای این آزمایش شامل تراکم های کاشت (50,100,200,300,400 , 500 بوته در متر مربع) و ارقام (تجن و زاگرس) بودند...

2011
Carolina de Oliveira Bernardes Flávio Santos Lopes Maria José Reis da Rocha Talita Miranda Teixeira Xavier

Taro, Colocasia esculenta (L.) Schott, is the most important species from the Araceae family. The leaf area (LA) is important for the interception of solar radiation and for the biomass production. The light extinction coefficient (k) is related to the leaf inclination angle, leaf arrangement, regarding the Leaf Area Index (LAI), providing an indication of the plants efficiency on intercepting ...

Journal: :Journal of environmental biology 2009
Ismail Sezer Fatih Oner Zeki Mut

In this research, leaf area prediction model was developed for some leaf-used maize (Zea mays L.) cultivars namely Coluna, Luce, Maveric, Ranchero, TTM-813, Zamora and RX-788 grown in Black Sea region of Turkey. Lamina width, length and leaf area were measured without destroying the leaf to develop the models. The actual leaf areas of the plants were measured by PLACOM Digital Planimeter and mu...

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