Root Growth Chracteristics of Peanut Genotypes
Other Title
落花生品種根之生長特性
Journal
中華農業研究
Journal Volume
36
Journal Issue
1
Pages
41-52
Date Issued
1987-03-04
Date
1987-03-04
Author(s)
Ming-Teh Huang
Darold L. Ketring
黃明得
Darold L. Ketring
Abstract
To evaluate the potential of peanut root growth characteristics such as taproot growth rate at different periods of growth, taproot length, root number, root length density at different depths, and the relationship between taproot length and shoot dry weight were examined under greenhouse conditions during 1983 and 1984. Separate studies on root volume, root and shoot dry weights, root/shoot ratio, and their interrelationship were also conducted. Data obtained showed that peanut genotypes differed in taproot growth rate, root number, and length density in the first 30 cm of soil profile. However, perhaps due to the different times during the year when the tests were conducted, several characteristics such as root length density, number of roots at different depths, and correlation between taproot length and shoot dry weight varied between tests. In root length studies, the fastest taproot elongation was found between 21 to 28 days after planting and virginia type peanuts had longer taproot and faster root growth rate than spanish types. The correlation between taproot length and shoot dry weight was significant in one test held in late winter. In root volume studies, no significant differences in root volume and root dry weight were found between types. Virginia type peanuts tended to have heavier shoot and total dry weight, but lower root/shoot ratios than spanish type. Significant positive linear correlations were found between root volume and shoot, root, and total dry weights. Also, root dry weight was positively associated with shoot, and total dry weight. Root volume and root dry weight did not show linear relationship with the root/shoot ratio in this study.
根之生長特性被認為與作物之耐旱性有關。本試驗乃分別于 1983 及 1984 年于溫室中，探討落花生型及品種間根長、主根生長速率、根數、根長密度之差異，以及主根長度與地上部乾重之相關。此外，也探討根容積、根與地上部乾重，及根與地上部重量比之差異及其彼此間之相關。由結果知，品種間在主根生長速率、根數及在土表下 30 公分之根數有顯著之差異。落花生主根生長速率最高的時期在播後 21-28 天間，其中 Virginia 型之主根長度及生長速率皆大于 Spanish 型。主根長度與地上部乾重則僅在試驗二中有正相關關係。在根容積方面， Virginia 型之地上部及全株乾重較大，但根與地上部重量比則較 Spanish 型小。根容積與根、地上部及全株重等皆呈正相關，根重也與地上部及全株重呈正相關關係。然而，根容積及根重與根／地上部重量比間之相關，並不顯著。
Publisher
農業試驗所
Type
journal article
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