Effects of Nitrogen Fertilizing Systems and Harvest Frequencies on Forage Dry Mater Yield and Quality of Snail Medic ( Medicago scutellata Var. Robinson)

摘要

The study was conducted to determine the effects of nitrogen fertilizing systems and harvest frequencies on DM ( dry matter ) yield and forage quality of snail medic; Medicago scutellata var. Robinson. Rhizobium meliloti inoculation and four levels of chemical nitrogen fertilizer (0, 25, 75 and 125 kg N ha-1) were allocated to the main plots while four levels of harvest frequencies such as 1, 2 and 3 weeks intervals and control with only one harvest at 50% flowering were assigned to subplots. According to the results of this experiment, nitrogen fertilizing systems had significant effects (p-1 with two-week harvest interval produced acceptable DM yield with proper quality in M. scutellata , which eliminated the necessity of Rhizobium inoculation and reduced the cost and environmental contamination compared to 125 kg N ha-1.