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Titolo:
Seed yield and nutritive value of dry, mature subterranean clover (Trifolium subterraneum L.)
Autore:
Ru, YJ; Fortune, JA;
Indirizzi:
Univ Adelaide, Dept Agron & Farming Syst, Adelaide, SA 5371, Australia Univ Adelaide Adelaide SA Australia 5371 st, Adelaide, SA 5371, Australia
Titolo Testata:
AUSTRALIAN JOURNAL OF EXPERIMENTAL AGRICULTURE
fascicolo: 2, volume: 41, anno: 2001,
pagine: 169 - 175
SICI:
0816-1089(2001)41:2<169:SYANVO>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
GRAZING INTENSITY; CHEMICAL-COMPOSITION; WESTERN-AUSTRALIA; GROWING-SEASON; LEGUME SEEDS; CULTIVAR; MORPHOLOGY; PHENOLOGY; SHEEP; FEED;
Keywords:
mineral; digestibility; sheep; pasture;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Ru, YJ Univ Adelaide, SARDI Livestock Syst, Roseworthy Campus, Roseworthy,SA 5371, Australia Univ Adelaide Roseworthy Campus Roseworthy SA Australia5371 tralia
Citazione:
Y.J. Ru e J.A. Fortune, "Seed yield and nutritive value of dry, mature subterranean clover (Trifolium subterraneum L.)", AUST J EX A, 41(2), 2001, pp. 169-175

Abstract

The nutritive value of 26 cultivars of dry, mature subterranean clover wasevaluated at Shenton Park, Perth, Western Australia. The cultivars were divided into 3 maturity groups according to flowering time and each cultivar was sown in blocks comprising 4 replicates. The plots were grazed by sheep at 2-week intervals during the growing season. Dry mature plant material and soil were sampled in summer to examine the effect of grazing and cultivaron seed yield and nutritive value of feed residues. Cultivars heavily grazed in spring had a low herbage mass. There was no difference in seed yield and seed weight between heavily and lightly grazed cultivars. Dry matter digestibility and mineral content of dry residues was inconsistent for the 2 grazing treatments. The dry matter digestibility of dry, mature subterranean clover ranged from 40 to 56%, with a wide range of crude fibre, nitrogen and mineral content for the 26 cultivars. While most minerals in the dry residues were above the requirement for sheep, 7 cultivars had a zinc contentless than the maintenance requirement for sheep. There was an imbalance for all cultivars in calcium: phosphorus with a range of 4-10: 1. Concurrent estimates on the yield and composition of seed indicated that seed can be resource of minerals for grazing animals in summer. Most cultivars had a seed yield over 100 g/m(2) with that of 9 cultivars being over 130g/m(2). Seed was rich in nitrogen, sodium, phosphorus, potassium, magnesium, zinc and copper, and poor in sodium, calcium and manganese. However, there were no cultivars with an appropriate ratio of calcium and phosphorus. The imbalance in nitrogen and sulfur was a result of high nitrogen content with the ratio ranging from 19:1 to 29:1.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 14:02:44