SCIENTIFIC PAPERS

Scientific Papers, USAMV Bucharest, Series A, Vol. LII, 2009, ISSN 1222-5339EXPERIMENTAL RESULTS CONCERNING TEMPORARYGRASSLANDS WITHIN SUSTAINABLE FARMING SYSTEM INROMANIAN PLAINGH. MOTCĂ*, N. DINCĂ*, ANA-MARIA GLĂVAN*, NICOLETA OLTENACU*,IZABELA IVANOVICI*, GH.L. BURICESCU***University of Agronomic Sciences and Veterinary Medicine of Bucharest**SC Agricover SA, Scanteia Station of IalomitaKeywords: mixtures, fertilization, yield, botanical compositionAbstractDefinitory elements of temporary grasslands sustainable cropping technology in RomanianPlain are: fertilization restrictive systems and the structure of graminaceae and perennialleguminous mixtures adjusted to this system.For this purpose, it was founded an experimental station within the Didactical Farm MoaraDomneasca of USAMV Bucharest, on reddish preluvosoil. There were studied 3 variants ofmixtures, in different proportions, among the most adjusted varieties to the growingconditions in this area (Dactylis glomerata 40-50-60% and Medicago sativa 60-50-40%),as well as 3 variants of mineral restrictive fertilization with N 0-50-100 and P 2 O 5 -50.As it results from the experimental data during 2006-2008, among the three years, thereare essential differences concerning the achieved production. Thus, while the first twoyears production is 7-9 t/ha DM, during the third year the yield doubles itself (14-16 t/haDM), as a consequence of the precipitations higher level and of their better distribution,especially during the first harvest.On the basis of the obtained results in the system of sustainable agriculture in RomanianPlain, there are recommended mixtures with a share of minimum 50% Medicago sativa,with mixed use or only by harvesting, in the unirrigated crop, fertilized with only 50 kg/haP 2 O 5 . For grazing, there are recommended mixtures where Medicago sativa’s share issmaller than 50%, fertilized with 50 kg/ha N and 50 kg/ha P 2 O 5 . For both variants, thereare obtained yields over 10 t/ha DM, of superior quality, effective as well from economicpoint of view as ecological one.361