Response of Field Pea (Pisum sativum sp Arvense L.) to Rhizobium Inoculation and Nitrogen Application in Eastern Anotolia

A field experiment was conducted during 2005-2006 and 2006-2007 growing seasons to determine, the effects of Rhizobium inoculation and different levels of nitrogen on the yield and growth of field pea (Pisum sativum sp. Arvense L.). Nitrogen application had significant effect on the plant height, number of branches, root and shoot dry weight, number of nodules, seed yield, biomass yield, harvest index, number of pods, as well as crude protein rate of seeds in both years. Plant height, number of pods, harvest index, number of nodules, crude protein rate and root dry weight were higher with application of 20 kg N ha(-1) while seed yield, shoot dry weight and number of branches were higher with application of 60 kg N ha(-1), in the 2 seasons. The lowest values related to these parameters were obtained from the control treatment. Inoculation treatment had also significant effect on the all parameters investigated in both years. The highest values regarding these parameters were obtained from inoculated plants, whereas the lowest values were obtained from the uninoculated plants. Interactions of nitrogen and inoculation had significant effects on the all parameters investigated, except for number of nodules in 2005-2006 and crude protein rate of seeds in both years. The highest seed yield was obtained under treatment 20 kg N ha(-1) + inoculation with 1654.3 and 1625.0 kg ha(-1) in 2005-06 and 2006-07, respectively.