engleski

Influences of irrigation and fertilization on soybean properties and nitrogen leaching

Influences of irrigation rates and N fertilization on soybean grain yield and N leaching were tested under field conditions on Osijek, during the growing seasons 2001, 2003 and 2005 (A). The irrigation started on level of 80% field water capacity, A1 (FWC) and at level of 65% FWC, A2 and irrigate up to FWC, and non-irrigated, A3. Increased rates of N: 0, B1 ; 100, B2 and 200 kg N ha-1, B3 were applied. The experiment was conducted by split- plot method. Ebermeier's lysimeters (open type: 80 x 80 x 10 cm) were conducted for collecting leachate for measuring nitrogen leaching. The soybean grain yield showed statistical very significant differences in growing season, irrigation and interaction of growing season and irrigation. Mean leaching NO3-N varied from 0.32 kg N ha-1 to 7.88 kg N ha-1 in year 2001, while were greater in year 2005 and varied form 2.41 kg N ha-1 to 23.71 kg N ha-1.

soybean ; irrigation ; nitrogen fertilization ; yield ; protein ; oil ; leaching

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