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Titolo:
EXTRACTION, APPARENT N-RECOVERY AND MINERAL-COMPOSITION OF N-FERTILIZED SPECIES AND VARIETIES OF CYNODON IN A VERTISOL SOIL
Autore:
RAMOS N; HERRERA RS; CURBELO F;
Indirizzi:
ACAD SCI CUBA,INST ANIM SCI,APARTADO 24 HAVANA CUBA
Titolo Testata:
Cuban journal of agricultural science
fascicolo: 1, volume: 27, anno: 1993,
pagine: 73 - 79
SICI:
0864-0408(1993)27:1<73:EANAMO>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Keywords:
RAINY AND DRY PERIODS; VARIETY; SPECIES; NITROGEN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
NO
Recensione:
Indirizzi per estratti:
Citazione:
N. Ramos et al., "EXTRACTION, APPARENT N-RECOVERY AND MINERAL-COMPOSITION OF N-FERTILIZED SPECIES AND VARIETIES OF CYNODON IN A VERTISOL SOIL", Cuban journal of agricultural science, 27(1), 1993, pp. 73-79

Abstract

The performance of five species and varieties of the Cynodon genus (C. dactylon cv. Coastal, C. dactylon cv. Coast cross 1, C. dactylon, cv. Coast cross 2, C. nlemfuensis cv. Panamanian and C. nlemfuensis cv. Jamaican) was analysed in a vertisol soil, at increasing N dosages (0,200 and 400 kg/ha/year) using a factorial arrangement (3 x 5) in a random block design with 4 replications. There was no interaction for the factors studied. The N dosage differed (P < 0.001) for the N extraction with 74, 258 and 420 kg/ha. The highest annual average extractionswere for Coast cross 2 bermuda grass and Jamaican star grass with 260.8 and 260.4 kg, while the lowest extractions were from Coast cross 1 bermuda grass and Jamaican star grass with 240 and 241 kg, which differed (P < 0.001) from the rest of the pastures. There were differences (P < 0.001) in the N recovery between the dosages, with the highest recuperation in the lowest dosage (92%). Coast cross 2 bermuda grass presented the highest recovery (106.5%), followed by Coastal bermuda grass and Panamanian star grass (96.3 and 91.5%, respectively). not differing from Coast cross 1 bermuda grass and Jamaican star grass with 85.0and 185.5%. The phosphorus content differed (P < 0.001) in all pastures and the highest content was for Jamaican star grass with 0.50 and 0.48% for the dry and rainy periods, respectively. Potassium was increased (P < 0.001) with the N level with average annual levels of 1.63, 1.90 and 2.07%. Calcium and magnesium did not differ with N dosages, surpassing Coastal bermuda grass in calcium content in the dry period and Jamaican star grass showed poor variation in magnesium. The highest mineral contents were achieved in the dry period. Results show that for the extractions obtained by the pastures, the apparent N recovery, as well as good mineral contents, N application is necessary.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 04:27:37