Evaluating Root Growth Potential of Tree Seedlings with an Automated Measuring System

1989

S. 191-199

2 Abb., 1 Tab., 11 Lit. Ang.

Unselbständiges Werk

200102042

Root growth of tree seedlings was quantified as change in root area index by using a video camera and digitizing area meter system that sums scanning line and root intersections. Number and total length of roots >0.5 cm and area index change were measured over a wide range of values. Linear regressions indicated that the automated and manual quantification methods yield essentially the same result. The automated method reduces measurement time, minimizes observer subjectivity, and estimates all new root growth. However, the equipment is costly, and the method does not provide information on the origin or size of new roots.