Analysis of dry matter yield structure of forage grasses
Lemeziene, N.(Lithuanian Inst. of Agriculture, Akademija (Lithuania))E-mail:nijole@lzi.lt | Kanapeckas, J.(Lithuanian Inst. of Agriculture, Akademija (Lithuania)) | Tarakanovas, P.(Lithuanian Inst. of Agriculture, Akademija (Lithuania)) | Nekrosas, S.(Lithuanian Inst. of Agriculture, Akademija (Lithuania))
An average dry matter (DM) yield structure (three cuts per growing season) in relation to agronomically valuable characteristics of six forage grass species and the year of utilization was studied over the period from 1989 to 2002 in Lithuania. Concerning the yields in the first cut, the most productive species in two years of utilization were Phleum pratense (P less than 0.01) and Festulolium hybrids (P less than 0.05) with average DM yields 7.42 and 6.66 t/ha, respectively, moderately productive - Festuca pratensis, Dactylis glomerata and Lolium perenne (5.58, 5.42 and 5.20 t/ha, respectively), low (P less than 0.01) yielding was Poa pratensis (4.19 t/ha). Concerning the two aftermath cuts, the highest yield was obtained with Dactylis glomerata (7.30 t/ha, P less than 0.01), followed by Festulolium hybrids (5.85 t/ha), Festuca pratensis (4.94 t/ha), Poa pratensis (4.57 t/ha), Lolium perenne (4.48 t/ha), and Phleum pratense (3.92 t/ha). Dactylis glomerata and Poa pratensis had the highest proportion of aftermath yield in the total annual yield (57.7 and 52.2%, respectively). In conclusion, Dactylis glomerata and Festulolium hybrids were the most productive species.
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