The effect of nitrogen applications on the growth of young olive trees and nitrogen use efficiency

Turkish Journal of Agriculture & Forestry

article

ISABEL FERREIRA¹  MARGARİDA ARROBAS¹  JOSÉ MOUTINHO-PEREIRA²  CARLOS M. CORREIA²  MANUEL ANGELO RODRIGUES² 

[1] Centro de Investigação de Montanha – Instituto Politécnico de Bragança, Campus de Santa Apolónia;Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes e Alto Douro

关键词: Apparent nitrogen recovery;    field trials;    Olea europaea;    olive yield;    pot experiment;   

DOI  :  10.3906/tar-1905-26

来源: Scientific and Technical Research Council of Turkey

【 摘 要 】

Two field trials (FieldExp1 and FieldExp2) and a pot experiment (PotExp) were c0onducted over a period of 3 years to assess olive tree response to nitrogen (N) applications and to estimate apparent N recovery. FieldExp1 was installed in a 3-year-old olive grove. FieldExp2 consisted of a plantation of young rooted plants. Two treatments were applied in both experiments: N application and a nonfertilized control. In PotExp, 4 N rates were used. In FieldExp1, olive yield significantly increased with applied N in only 1 of the 3 growing seasons. In FieldExp2, aboveground dry matter yield significantly increased with N application. In PotExp, total dry matter yield displayed a typical saturation curve in response to N rates. The poor response of olive yield to N application might be due to the reduced amount of N removed in the crop, and also to the negative interaction found between N application and water deficit. Apparent N recovery reached values varying from 13.1% in FieldExp2 to ~100% in PotExp. The results indicate that the olive response to N and N use efficiency seem to be influenced more by the agroecological conditions defining target yield and N loss, rather than by plant species.

【 授权许可】

Unknown