Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Potential of early-maturing soybean cultivars in late plantings
Autore:
Egli, DB; Bruening, WP;
Indirizzi:
Univ Kentucky, Dept Agron, Lexington, KY 40546 USA Univ Kentucky Lexington KY USA 40546 Dept Agron, Lexington, KY 40546 USA
Titolo Testata:
AGRONOMY JOURNAL
fascicolo: 3, volume: 92, anno: 2000,
pagine: 532 - 537
SICI:
0002-1962(200005/06)92:3<532:POESCI>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
RADIATION-USE EFFICIENCY; MEDITERRANEAN-TYPE ENVIRONMENT; CROPPING SYSTEM; WHEAT CULTIVARS; LEAF NITROGEN; DRY-MATTER; YIELD; GROWTH; DATES; PRODUCTIVITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Egli, DB Univ Kentucky, Dept Agron, Lexington, KY 40546 USA Univ KentuckyLexington KY USA 40546 on, Lexington, KY 40546 USA
Citazione:
D.B. Egli e W.P. Bruening, "Potential of early-maturing soybean cultivars in late plantings", AGRON J, 92(3), 2000, pp. 532-537

Abstract

Late planting reduces soybean [Glycine max (L. ) Merr.] yields in soybean-winter wheat (Triticum aestivum L.) double-cropping systems. We evaluated the hypothesis that the use of early-maturing soybean cultivars to shift reproductive growth into a more favorable environment would avoid some or all of this yield penalty. Soybean cultivars Hardin and Kasota [maturity group (MG) I], Burlison and Elgin 87 (MG II), Pioneer 9392 and Probst (MG III), and Stressland and Penny-rile (MG IV) planted in 38-cm rows were used in a 3-yr irrigated experiment with two planting dates (early, mid-May; late, lateJune) at Lexington, KY (38 degrees N lat). Delayed planting reduced yield (7-36%) of all cultivars as a result of fewer seeds m(-2). Cultivars from MG I and II did not produce higher yields in the late plantings. A combination of narrow rows (19 cm) and high seeding rates (105 seeds m(-2)) had no effect on yield of cultivars from MGs I and II in either planting date. However, early maturity did provide an earlier harvest date without significantyield loss. Seed number was significantly related to crop growth rate (CGR) during flowering and pod set (r(2) = 0.36) and to length of flowering andpod set (r(2) = 0.56). Radiation use efficiency (g dry matter MJ(-1) intercepted photosynthetically active radiation) was generally reduced in the late plantings for MG III and TV cultivars but not for MG I and II. Early-maturing cultivars in an irrigated environment did not reduce the yield penalty associated with late plantings.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 07:34:34