DEFLECTION OF PLANT ROOTS
DEFLECTION OF PLANT ROOTS
复制标题
DOI：
10.1016/0021-8634(78)90075-6
复制
发表时间：
1978-01-01
期刊：
影响因子：
--
通讯作者：
HEWITT, JS
中科院分区：
文献类型：
--
作者：
DEXTER, AR;HEWITT, JS
当植物根遇到土壤中的界面时，它要么被偏转，要么穿透界面并进入新介质。如果根刚刚穿过空隙生长，当它遇到界面时可能会弯曲，从而发生偏转。如果许多根已经穿过弱土壤介质生长并遇到较强的土壤介质，则穿透的比例取决于两种介质的强度以及根与界面的入射角。根穿透土壤界面的比例方程的开发占这些影响。它与小麦根的一些新的实验结果和Greacen、Barley和Farrell关于豌豆根的一些结果相吻合。这两种植物的反应的功能形式是相似的。数据，使9种植物的偏转行为。[Hordeum vulgare，Medicago sativa，M.蒺藜、燕麦、豌豆、黑麦、大豆、小麦和小黑麦]。结果表明，土壤结构和强度因子对根系的分布和形态有重要影响。
When a plant root meets an interface within soil, either it is deflected or it penetrates the interface and enters the new medium. If the root has just grown across a void, it may buckle when it meets the interface and hence by deflected. If a number of roots have grown through a weak soil medium and meet a stronger soil medium, the proportion penetrating depends on the strengths of the 2 media and on the angle of incidence of the roots with the interface. An equation for the proportion of roots penetrating a soil interface is developed which accounts for these effects. It is fitted to some new experimental results for wheat roots and to some results of Greacen, Barley and Farrell for pea roots. The functional form of the response is similar for both plant species. Data are presented which enable the deflection behavior of 9 plant spp. [Hordeum vulgare, Medicago sativa, M. truncatula, Avena sativa, Pisum sativum, Secale cereale, Glycine max, Triticum aesturim and Triticale] to be estimated. The results indicate the significance of soil structure and strength factors on the distribution and morphology of roots.