[Estimation of the efficiency of inoculation with new Rhisobium strains for spring vetch]
2000
Ambrazaitiene, D. (Lithuanian Inst. of Agriculture, Dotnuva (Lithuania))
Inokulation efficiency of the spring vetch (Vicia sativa L.) cultivar 'Tverai' with nine strains of Rhisobium leguminosarum biovar viciae was investigated in the experiments established on a soddy podzolic loamy soil over the period 1992-1995. It was established that meteorological condition and particularly moisture had the greatest effect on spring vetch inoculation with Rhisobium. A direct correlation was established between the yield of crude protein accumulated in vetch and available P2O5 content in the soil (r=0.69-0.88). The relationship between the protein yield and available K2O content in the soil can be expressed by a negative correlation (r=0.58-(-0.79). The activity of Rhizobium enzyme nitrogenaze was investigated in 1996-1997. It was established, that the activity nitrogenase of inoculated vetch plants was by 28-32 higher than in the noninoculated plants. It is nessesary to take into account all indicators that influence the efficiency of inoculation with Rhizobium. The highest inoculation efficiency was achieved by using strains 60-92 and 62-92
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