نتایج جستجو برای: Chlorophyll content index

تعداد نتایج: 807159  

2006
Jadunandan Dash Paul J. Curran

The MERIS Terrestrial Chlorophyll Index (MTCI) is designed to monitor vegetation condition via an estimation of chlorophyll content. Its simplicity of calculation, suitability for automation and most importantly, sensitivity to all and notably, high values of chlorophyll content made it a suitable level-2 ESA product. This index effectively combines information on leaf area index and the chloro...

Journal: :پژوهش های حبوبات ایران 0
مراد شعبان سیروس منصوری فر مختار قبادی سید حسین صباغ پور

drought stress is the most important factor that reduces yield in crops including chickpea and causes some changes in seed composition. this study was performed in order to evaluate the effects of drought stress and starter nitrogen fertilizer on four cultivars of chickpea. experiment was performed in a split-factorial using randomized complete block design with three replications. drought stre...

2010
Xingang Xu Xiaohe Gu Xiaoyu Song Cunjun Li Wenjiang Huang

Leaf chlorophyll content is not only an important biochemical parameter for determinating the capacity of rice photosynthesis, but also a good indicator of crop stress, nutritional state. Due to the reliable, operational and non-destructive advantages, hyperspectral remote sensing plays a significant role for assessing and monitoring chlorophyll content. In the study, a few of typical vegetatio...

2009
K. P. Rutkowski

The usefulness of nondestructive methods for measuring chlorophyll content in skin of ‘Golden Delicious’ apples and for evaluating quality parameters and fruit maturity using optical reflectance spectrometry was studied. The fruit weight, firmness, total soluble solids content and titratable acidity during vegetation period and short-term storage at 10°C of ‘Golden Delicious’ apples were measur...

2003
Jadunandan Dash Paul J. Curran

The long wavelength edge of the major chlorophyll absorption feature in the spectrum of a vegetation canopy moves to longer wavelengths with an increase in chlorophyll content. The position of this red-edge has been used successfully to estimate, by remote sensing, the chlorophyll content of vegetation canopies. Techniques used to estimate this red-edge position (REP) have been designed for use...

Journal: :Int. J. Applied Earth Observation and Geoinformation 2013
M. Schlemmer Anatoly A. Gitelson J. Schepers R. Ferguson Y. Peng J. Shanahan Donald Rundquist

Leaf and canopy nitrogen (N) status relates strongly to leaf and canopy chlorophyll (Chl) content. Remote sensing is a tool that has the potential to assess N content at leaf, plant, field, regional and global scales. In this study, remote sensing techniques were applied to estimate N and Chl contents of irrigated maize (Zea mays L.) fertilized at five N rates. Leaf N and Chl contents were dete...

2002
Driss Haboudane John R. Miller Nicolas Tremblay Pablo J. Zarco-Tejada Louise Dextraze

Recent studies have demonstrated the usefulness of optical indices from hyperspectral remote sensing in the assessment of vegetation biophysical variables both in forestry and agriculture. Those indices are, however, the combined response to variations of several vegetation and environmental properties, such as Leaf Area Index (LAI), leaf chlorophyll content, canopy shadows, and background soil...

Journal: :زراعت دیم ایران 0
نادر دادخواه گروه زراعت، دانشکده کشاورزی، دانشگاه محقق اردبیلی، اردبیل، ایران علی عبادی گروه زراعت، دانشکده کشاورزی، دانشگاه محقق اردبیلی، اردبیل، ایران قاسم پرمون گروه زراعت، دانشکده کشاورزی، دانشگاه محقق اردبیلی، اردبیل، ایران عبدالقیوم قلی پوری گروه زراعت، دانشکده کشاورزی، دانشگاه محقق اردبیلی، اردبیل، ایران سودابه جهانبخش گروه زراعت، دانشکده کشاورزی، دانشگاه محقق اردبیلی، اردبیل، ایران

in order to study the effect of foliar zinc spraying on photosynthetic pigments and yield of chickpea under water stress conditions, a factorial experiment carried out based on randomized completely block design (rcbd) with three replications in university of mohaghegh ardabili agricultural research station in 2012. the treatments consisted of three levels of irrigation (irrigated at planting, ...

Journal: :Remote Sensing 2017
Jan G. P. W. Clevers Lammert Kooistra Marnix M. M. van den Brande

Leaf area index (LAI) and chlorophyll content, at leaf and canopy level, are important variables for agricultural applications because of their crucial role in photosynthesis and in plant functioning. The goal of this study was to test the hypothesis that LAI, leaf chlorophyll content (LCC), and canopy chlorophyll content (CCC) of a potato crop can be estimated by vegetation indices for the fir...

2012
E. Khaleghi K. Arzani N. Moallemi

This study was conducted to determine effect of water stress on chlorophyll content and chlorophyll fluorescence parameter in young `Dezful’ olive trees. Three irrigation regimes (40% ETcrop, 65% ETcrop and 100% ETcrop) were used. After irrigation treatments were applied, some of biochemical parameters including chlorophyll a, b, total chlorophyll, chlorophyll fluorescence and also chlorophyll ...

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