Minirhizotron Observation of Pigeonpea Root System after Waterlogging.
نویسندگان
چکیده
منابع مشابه
Measuring root turnover using the minirhizotron technique
Cheng, W.-X., Coleman, D.C. and Box, J.E., Jr., 1991. Measuring root turnover using the minirhizo° tron technique. Agric. Ecosystems Environ., 34: 261-267. Measurement of root turnover has been one of the most difficult problems in terrestrial ecosystem studies owing to the lack of an appropriate method. In this paper, a method for measuring intraseasonal root turnover is described. The recentl...
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Even though fine-root turnover is a highly studied topic, it is often poorly understood as a result of uncertainties inherent in its sampling, e.g., quantifying spatial and temporal variability. While many methods exist to quantify fine-root turnover, use of minirhizotrons has increased over the last two decades, making sensor errors another source of uncertainty. Currently, no standardized met...
متن کاملFine root heterogeneity by branch order: exploring the discrepancy in root turnover estimates between minirhizotron and carbon isotopic methods.
Fine roots constitute a large and dynamic component of the carbon cycles of terrestrial ecosystems. The reported fivefold discrepancy in turnover estimates between median longevity (ML) from minirhizotrons and mean residence time (MRT) using carbon isotopes may have global consequences. Here, a root branch order-based model and a simulated factorial experiment were used to examine four sources ...
متن کاملminirhizotron and carbon isotopic methods
• Fine roots constitute a large and dynamic component of the carbon cycles of terrestrial ecosystems. The reported fivefold discrepancy in turnover estimates between median longevity (ML) from minirhizotrons and mean residence time (MRn using carbon isotopes may have global consequences. • Here, a root branch order-based model and a simulated factorial experiment were used to examine four sourc...
متن کاملAutomatic Minirhizotron Root Image Analysis Using Two-dimensional Matched Filtering and Local Entropy Thresholding
An approach to automate the procedure of extracting and measuring roots in minirhizotron images is presented. By the use of two-dimensional matched filtering and local entropy thresholding, one can efficiently enhance the local contrast of the root and then extract it from the minirhizotron image. We also present several techniques for discriminating roots against extraneous objects based on th...
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ژورنال
عنوان ژورنال: Japanese Journal of Crop Science
سال: 1997
ISSN: 0011-1848,1349-0990
DOI: 10.1626/jcs.66.288