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Wheat yield and grain quality as affected by tillage, sowing time and nitrogen fertilization under rainfed Mediterranean conditions
The research was carried out in 9 sites (1999-2001) of an inner area of Sicily different for soil type, slope, exposure and preceding crop. The treatments were: Conventional tillage and sowing at conventional time (CT); No tillage and sowing at conventional time (NTc); and no tillage and early sowing (NTe). In 2000-01 the effects of three nitrogen fertilization treatments (single application at planting, P, and split dressing at two different rates, S and S+) were also evaluated. No tillage systems significantly increased grain yield compared to CT treatment; no differences were observed between the two sowing dates. The productive benefits of no tillage were associated with a decrease of grain protein content that was heavier with early sowing. Regarding N fertilization treatments, S compared with P allowed a significant yield increase; no interaction with tillage technique was found. At the lowest fertilizer rate, split fertilization allowed a significant increase of grain protein content only in NTe.
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BLE, DATE DE SEMIS, FERTILISATION, NON TRAVAIL DU SOLCiter cet article
Amato G., Giambalvo D., Stringi L., Di Miceli G., Frenda A.S. Wheat yield and grain quality as affected by tillage, sowing time and nitrogen fertilization under rainfed Mediterranean conditions. In : Cantero-Martínez C. (ed.), Gabiña D. (ed.). Mediterranean rainfed agriculture: Strategies for sustainability . Zaragoza : CIHEAM, 2004. p. 151-156. (Options Méditerranéennes : Série A. Séminaires Méditerranéens; n. 60). Final Seminar of the Regional Action Programme on Rainfed Agriculture (RAP-RAG), 2003/06/02-03, Zaragoza (Spain). http://om.ciheam.org/om/pdf/a60/04600056.pdf