Research on the dynamics of the productivity components in Dactylis glomerata L., under the conditions of the Romanian Plain
Published in Scientific Papers. Series A. Agronomy, Vol. LV-2012
Written by Ana-Maria STANCIU, Vasilica STAN, Gheorghe MOTCĂ
Cocksfoot (Dactylis glomerata L.) is one of the most important species of perennial grass, with the highest frequency in the floristic composition of temporary grasslands. Its widespread occurrence as forage crop is due to the high productivity, great vivacity, ecological plasticity and various possibilities of use. The research conducted at Moara Domneasca Experimental Farm between 2009 and 2011 concerned two varieties of cocksfoot, Regent and Ambassador and two types of culture, i.e pure culture and a mixture with alfalfa (Medicago sativa L.). Our research studied the elements that contributed to the cocksfoot yield, i.e. the leaf area index (LAI), the leaf area ratio (LAR), the specific leaf area (SLA), the leaf weight ratio (LWR) and the speed growth indices (net assimilation rate - NAR, crop growth rate – CGR and relative growth rate - RGR). During the experiments (2009-2011), on average, at the first cycle of harvest, both varieties of cocksfoot showed higher specific leaf area values between 11.99 and 22.55 m2.kg-1 at Regent variety and between 12.66 and 24.62 m2.kg-1 at Ambassador variety. The highest growth speed of cocksfoot plant was -2-1 -2-1 registered at the first harvest cycle, i.e 8.35 g.m.day at Regent variety and 10.22 g.m.day at Ambassador variety.