Data/hora: 13/06/2024 07:13:24

Provedor de dados: | 18
País: | United Kingdom
Título: | Nitrogen placement, row spacing, and water management for furrow-irrigated field corn
Autores: | Lehrsch, G.; Sojka, R.; Westermann, D.
Data: | 2008
Ano: | 2008
Palavras-chave: | Corn / maize; Water management; Mass Import - autoclassified (may be erroneous).
Resumo: | Banding and sidedressing nitrogen (N) fertilizer on a never-irrigated side of a row of corn  (Zea mays L.) were hypothesized to maintain yield and decrease nitrate leaching. In a two—year  ?eld study on a Portneuf silt loam (Durinodic Xeric Haplocalcid) in southern Idaho, we  evaluated effects on yield and N uptake of 1) urea placement (broadcast pre-plant vs. band at  planting), 2) row spacings (30-in vs. an offset 22—in spacing in which every pair of 22-—in rows  was positioned close to a furrow rather than each row on a bed center), and 3) water  management. Our water management, termed irrigated furrow positioning, consisted of every-  second furrow irrigation in which we applied water to either a) the same or b) the Opposite side  of the row with successive irrigations, the latter called alternating furrow irrigation. At season’s  end, we harvested 20 ft of row at three locations in each plot for silage and at three other  locations for grain. Grain yield was not affected by the positioning of the irrigated furrow.  However, averaged across years, grain yield from 22-in rows was 113 bu acre-1 from banded  plots, 5% greater (P&lt;0.05) than broadcast plots. Two-year average grain yield from 30-in rows  was 107 bu acre-1, with no difference between banding and broadcasting. In the second year, N  uptake in grain averaged across row spacings was 72.3 lb acre-l from banded plots and 65.5 lb  acre-l from broadcast plots (P&lt;0.01). Silage yield increased up to 26% and N uptake in silage  increased up to 21% from banding, compared to broadcasting, where we irrigated the same  furrow in the study’s second year. In both years, grain and silage yield and N uptake in grain  and silage were similar or greater where urea was banded on one side of a row rather than  broadcast.
Tipo: | Conference or Workshop Item
Idioma: | Inglês

Identificador:

http://eprints.nwisrl.ars.usda.gov/1267/7/1243.pdf

Lehrsch, G. and Sojka, R. and Westermann, D.  (2008) Nitrogen placement, row spacing, and water management for furrow-irrigated field corn.  pp. 42-48.  In: Moore, A. (ed.) Proceedings of the Idaho Nutrient Management Conference.  Vol. 4.   USA-ID-Jerome, 2008/03/04.

Relação:

http://eprints.nwisrl.ars.usda.gov/1267/

1243

Formato: | text