Cambios en producción y calidad del forraje otoño-invernal por el agregado de nitrógeno en materiales geneticos de agropiro

Content Provider	Semantic Scholar
Author	Alonso, Sara Isabel Fernández, Juan Antonio García Borrajo, C. I.
Copyright Year	2000
Abstract	Nitrogen applications increase spring tall wheatgrass production, but its effects on production and quality in other seasons, on different genetic materials are unknown for the SE of the Bs. As. province conditions. The objective of this work was to determine the effect of nitrogen applications on autumn and winter forage production and nutritive value, of six tall wheatgrass materials. Forage cuts were made in April, June and August, in treatments with (N100) or without (N0) nitrogen applications. In vitro digestibility (DIVMS), neutral detergent fiber (FDN), total nitrogen percentage (%N), dry matter production (MS), digestible dry matter (MS-Dig) and nitrogen absorption (NAbs) were evaluated. Nitrogen applications increased tall wheatgrass MS in 60, 110 and 150% for April, June and August forage cuts, respectively. Same results were obtained for MS-Dig. Though the increase due to nitrogen application was higher for the winter forage cut, the greatest MS was obtained in the April cut. The nitrogen application increased the nutritive value. For N0 and N100, the DIVMS was 61,4 and 67,2%, the FDN 55,4 and 51,1%, and the %N 2,1 and 3,3 %, respectively. Phenotypic variability was detected among genetic materials for variables related to forage nutritive value, and it was expressed independently of nitrogen nutritional status. Present information is relevant to crop management and can provide guidelines for selecting germplasm in plant breeding programs, and enhance the positive effect of nitrogen on forage production and nutritive value.
Starting Page	115
Ending Page	124
Page Count	10
File Format	PDF HTM / HTML
Volume Number	18
Alternate Webpage(s)	http://suelos.org.ar/publicaciones/vol_18n2/alonso_115-124.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article