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Titolo:
Factor for estimating nitrogen contribution of cowpea as a cover crop
Autore:
Aguiar, JL; Williams, WA; Graves, WL; McGiffen, M; Samons, JV; Ehlers, JD; Matthews, WC;
Indirizzi:
Univ Calif Davis, Dept Agron & Range Sci, Davis, CA 95616 USA Univ Calif Davis Davis CA USA 95616 gron & Range Sci, Davis, CA 95616 USA
Titolo Testata:
JOURNAL OF AGRONOMY AND CROP SCIENCE-ZEITSCHRIFT FUR ACKER UND PFLANZENBAU
fascicolo: 3, volume: 186, anno: 2001,
pagine: 145 - 149
SICI:
0931-2250(200105)186:3<145:FFENCO>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Keywords:
cowpea; dry matter content; growth stage; nitrogen factor; per cent nitrogen;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: Aguiar, JL Univ Calif Cooperat Extens Riverside Cty, 82-675 Highway 111,Rm118, Indio, CA 92201 USA Univ Calif Cooperat Extens Riverside Cty 82-675 Highway 111,Rm 118 Indio CA USA 92201
Citazione:
J.L. Aguiar et al., "Factor for estimating nitrogen contribution of cowpea as a cover crop", J AGRON CR, 186(3), 2001, pp. 145-149

Abstract

The nitrogen contribution of cowpea [Vigna unguiculata (L. ) Walp.] above-ground biomass was estimated using the per cent nitrogen and per cent dry matter of 24 cowpea entries. Cowpea growth stage was assigned a maturity index, and an 'N factor' was calculated. Results for this species-specific 'N factor' ranged from 12.5 at the vegetative stage to 13.5 at the reproductivestage. Using the 'rule of 16' as developed for sampling the fresh biomass of other legume cover crops, the amount of nitrogen contributed by cowpeas can be estimated by using an average 'N factor' of 13.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/10/20 alle ore 03:52:28