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Anteile der Skelettabbildungen von Maispflanzen in Abhängigkeit von der Bestandesdichte und einem Mais–Sojabohnen‐Mischanbau
Author(s) -
Foroutanpour K.,
Dutilleul P.,
Smith D. L.
Publication year - 2000
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1046/j.1439-037x.2000.00362.x
Subject(s) - intercropping , canopy , mathematics , zea mays , agronomy , population , biology , botany , demography , sociology
Three‐year field experiments were conducted to determine whether the temporal pattern of fractal dimension (FD) for corn ( Zea mays L.) plant structure is altered by plant population density (PPD) or intercropping with soybean [ Glycine max. (L.) Merr.], and how changes in the FD are related to changes in other canopy characteristics. Plants in monocropped corn and intercropped corn–soybean plots were randomly sampled and labelled for later identification. Corn plant structure was photographed from the side that allowed the maximum appearance of details (perpendicular to the plane of developed leaves) and from two fixed sides (side 1: parallel to the row and side 2: perpendicular to the row). Images were scanned and skeletonized, as skeletal images provide acceptable information to estimate the FD of plant structure two‐dimensionally by the box‐counting method. Differences in the FD estimated from images taken perpendicular to the plane of developed leaves were not significant among competition treatments. An adjustment of corn plants to treatments, by changing the orientation of the plane of developed leaves with respect to the row, was observed. Based on overall FD means, competition treatments were ranked as: high > normal ≈ intercrop ≈ low for side 1 and intercrop > low ≈ normal > high for side 2. Leaf area index (LAI) and plant height had a positive correlation with FD. In contrast, light penetration had a negative correlation with FD. In conclusion, FD provides a meaningful and effective tool for quantifying corn plant structure, measuring the structural response to cultural practices, and modelling corn plant canopies.