کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4464765 1621827 2014 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Assessment of rice leaf chlorophyll content using visible bands at different growth stages at both the leaf and canopy scale
ترجمه فارسی عنوان
بررسی محتوای کلروفیل برگ برنج با استفاده از نوارهای قابل مشاهده در مراحل مختلف رشد در هر دو مقیاس برگ و کاناپه
کلمات کلیدی
دوربین دیجیتال عادی، تجزیه و تحلیل تصویر، برنج، نیتروژن، تجزیه و تحلیل مولفه اصلی، سنجش از دور در ارتفاع پایین
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات کامپیوتر در علوم زمین
چکیده انگلیسی


• We used principal component analysis to develop a new index for determining nitrogen and chlorophyll content in rice plant.
• All visible bands were considered in the new index for determining nitrogen and chlorophyll content.
• We determined the status of nitrogen and chlorophyll content in rice leaf during different growth stages using the new index.
• The LARS system used to acquire images for determining the chlorophyll content of rice plant at canopy scale.

Nitrogen is an important variable for paddy farming management. The objectives of this study were to develop and test a new method to determine the status of nitrogen and chlorophyll content in rice leaf by analysing and considering all visible bands derived from images captured using a conventional digital camera. The images from the 6-pannel leaf colour chart were acquired using Basler Scout scA640-70fc under light-emitting diode lighting, in which principal component analysis was used to retain the lower order principal component to develop a new index. Digital photographs of the upper most collared leaf of rice (Oriza sativa L.), grown over a range of soils with different nitrogen treatments, were processed into 11 indices and IPCA through six growth stages. Also a conventional digital camera mounted to an unmanned aerial vehicle was used to acquire images over the rice canopy for the purpose of verification. The result indicated that the conventional digital camera at the both leaf (r = −0.81) and the canopy (r = 0.78) scale could be used as a sensor to determine the status of chlorophyll content in rice plants through different growth stages. This indicates that conventional low-cost digital cameras can be used for determining chlorophyll content and consequently for monitoring nitrogen content of the growing rice plant, thus offering a potentially inexpensive, fast, accurate and suitable tool for rice growers. Additionally, results confirmed that a low cost LARS system would be well suited for high spatial and temporal resolution images and data analysis for proper assessment of key nutrients in rice farming in a fast, inexpensive and non-destructive way.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Applied Earth Observation and Geoinformation - Volume 32, October 2014, Pages 35–45
نویسندگان
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