کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
85130 158925 2008 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hardware and software efficacy in assessment of fine root diameter distributions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
Hardware and software efficacy in assessment of fine root diameter distributions
چکیده انگلیسی

Fine roots constitute the majority of root system surface area and thus most of the nutrient and water absorption surface. Fine roots are, however, the least understood of all plant roots. A sensitivity analysis of several software programs capable of providing root diameter distribution analyses was undertaken to determine if this software was capable of discriminating 10% changes in diameters of roots in the 0.05–0.2 mm diameter range. Digital images produced by drawing discrete lines, by scanning wires of various diameters, and by scanning roots from several legume species were analyzed and compared. None of the three packages were able to adequately analyze these images. Each introduced artifacts into the data that were severe enough to confound interpretation of the resulting diameter class length histograms at resolutions from 24 to 400 pixels (px) mm−1, and root diameters from 0.06 to 0.5 mm or larger. One package was, however, clearly superior to the other two for routine digital analysis. All three packages require additional development before they are suitable for routine analysis of fine roots. Due to the 252 px mm−1 resolution ceiling with currently available scanners, the smallest roots for which this level of discrimination is possible is 0.12 mm diameter. For many agricultural and forest species, up to 95% of their total root length is less than 0.1 mm in diameter. It is concluded that both hardware and software constraints currently inhibit the sensitivity of investigations into fine root diameter shifts in response to environmental conditions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers and Electronics in Agriculture - Volume 60, Issue 2, March 2008, Pages 178–189
نویسندگان
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