Changes in some morphological characteristics of reed canary-grass (Phalaroides arundinacea L.) during primary growth

摘要

This paper presents measurements of some morphological characteristics of Phalaroides arundinacea L. during primary growth, based on 4 years (2004-2007) of field investigations. The extended shoot height (ESH), the number of leaves (NL) per shoot, andnumber of dead leaves (NDL) per shoot, amounted to 89.06 cm, 8.80 leaves and 3.33 leaves, respectively. There were 5.33 active or live leaves per shoot on average during the investigation period. Sum of active leaf lamina length (SALL), the index of leafiness (IL) and ratio of SALL to ESH were increasing to the middle of investigation period then started to decrease until early June. Between-years differences were recorded, with a significantly weaker vegetative growth (NL, NAL and SALL) in 2007 whichcould be related to a shortage of water in that year.