scholarly journals Architectural analysis of root systems of mature trees in sandy loam soils using the root development classification

2019 ◽  
Vol 43 (2) ◽  
pp. 119-130
Author(s):  
ZHU Wei ◽  
◽  
YU Li-Xuan ◽  
ZHAO De-Hai ◽  
JIA Li-Ming ◽  
...  
Keyword(s):  
Root Development ◽  
Sandy Loam ◽  
Root Systems ◽  
Mature Trees ◽  
Architectural Analysis

Root mapping of three tropical pasture species using 32P

1969 ◽  
Vol 9 (39) ◽  
pp. 445 ◽  
Author(s):  
RA Bray ◽  
JB Hacker ◽  
DE Byth
Keyword(s):  
Root Growth ◽  
Root Development ◽  
Lateral Root ◽  
Sandy Loam ◽  
Lateral Roots ◽  
Root Systems ◽  
Growth Patterns ◽  
Constant Rate ◽  
Initial Root

Root growth patterns of Glycine javanica, Setaria anceps, and Medicago sativa were studied by uptake of 32P from a sandy loam. Placement of isotope was through permanently positioned PVC conduit on a grid over a 90� quadrant of the root system. Detection of radioactivity was in in situ plant material. Lucerne had strong initial root development but was slow to form lateral roots. Glycine and Setaria had quite similar root systems although Setaria had more rapid vertical root development than Glycine. Both these species had strong lateral root systems. When a regression of minimum root length against time was calculated, lateral root growth was shown to be independent of depth and distance from the plant, suggesting that roots behave as if growing from a point source in random directions at a constant rate. This rate was the same for all species. There were also indications of strong vertical root systems in lucerne and Setaria.

Tomato root distribution under furrow irrigation

1951 ◽  
Vol 2 (2) ◽  
pp. 118 ◽  
Author(s):  
K Spencer
Keyword(s):  
Root Distribution ◽  
Sandy Loam ◽  
Root Systems ◽  
Furrow Irrigation ◽  
Local Concentration ◽  
Tomato Root ◽  
Tomato Plants ◽  
Loam Soil ◽  
Two Measures ◽  
Top 40

The root distribution of mature tomato plants in a sandy loam soil under furrow irrigation was studied by measuring the lengths of roots washed from soil samples. Nearly 76 per cent. of the roots measured were found in the top 40 cm. of soil, but appreciable amounts of roots were found in the deepest samples (90-100 cm.). There were more roots half-way between plants in the row than closer to the plant, which suggests that mature root systems overlap when plants are spaced 29 ft. apart in the row. Distribution was compared for plants which had received an application of superphosphate and those which had not. Added phosphorus greatly increased the total length of roots and slightly increased the median root depth without much change in the relative values for these two measures between different lateral positions. In addition, there was some evidence for a local concentration of roots around the band of superphosphate. The relevance of the findings to cultivation and fertilizer practices in tomato culture is briefly discussed.

scholarly journals Architectural analysis of plant root systems 1. Architectural correlates of exploitation efficiency

1991 ◽  
Vol 118 (3) ◽  
pp. 375-382 ◽  
Author(s):  
A. H. FITTER ◽  
T. R. STICKLAND ◽  
M. L. HARVEY ◽  
G. W. WILSON
Keyword(s):  
Plant Root ◽  
Root Systems ◽  
Architectural Analysis ◽  
Plant Root Systems

Premières données sur l'architecture comparée des systèmes racinaires et caulinaires

1994 ◽  
Vol 72 (7) ◽  
pp. 963-975 ◽  
Author(s):  
Claire Atger ◽  
Claude Edelin
Keyword(s):  
Key Words ◽  
Root System ◽  
Woody Plants ◽  
Functional Organization ◽  
Root Systems ◽  
Architectural Analysis ◽  
Tree Crowns ◽  
Tree Root System ◽  
Whole Plant ◽  
Architectural Patterns

Since 1970, the architectural analysis of woody plants has given much information about structural and functional organization of tree crowns, their development, and reiteration patterns. In this study, we have extended this method to tree root systems. We describe the whole architecture of three species and we compare their root system and crown architectural patterns. Key words: architecture, tree, root system, crown, whole plant.

Pisolithus tinctorius forms long ectomycorrhizae and alters root development in seedlings of Pinus resinosa

1981 ◽  
Vol 59 (11) ◽  
pp. 2129-2134 ◽  
Author(s):  
Richard F. Sohn
Keyword(s):  
Growth Rate ◽  
Root Development ◽  
Lateral Root ◽  
Pinus Resinosa ◽  
Root Systems ◽  
Pisolithus Tinctorius ◽  
Third Order ◽  
Lateral Root Development ◽  
Mycorrhiza Formation

Ectomycorrhizae were synthesized on Pinus resinosa seedlings with Pisolithus tinctorius under aseptic, controlled environmental conditions. Root systems were harvested at 4, 6, and 15 weeks after seed germination. All roots were classified as either long or short and were examined for ectomycorrhiza development. Mycorrhizae were classified as "long mycorrhizae" or "short mycorrhizae," depending upon the type of root where infection occurred.Long mycorrhizae predominated at the early harvests and remained prominent at 15 weeks. A Hartig net of long mycorrhizae formed a morphological continuum from thin to thick. Negative correlations were observed between long mycorrhiza growth rate and the extent of infection. This suggests that a threshold growth rate exists below which mycorrhiza formation occurs readily, but above which mycorrhiza formation is progressively diminished. Relative to the controls, P. tinctorius inoculation increased the ratio of second- and third-order short roots to long roots. The role of host and fungus in controlling lateral root development is discussed.

Root Development of Cotton on Cecil Sandy Loam During 1926 1

1927 ◽  
Vol 19 (9) ◽  
pp. 839-842 ◽  
Author(s):  
Gilbeart H. Collings ◽  
J. D. Warner
Keyword(s):  
Root Development ◽  
Sandy Loam
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