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Titolo:
MINERAL AND MINERALIZABLE SOIL-NITROGEN A ND YIELDS OF CEREALS
Autore:
VANEK V; NAJMANOVA J; PETR J; NEMECEK R;
Indirizzi:
CESKA ZEMEDELSKA UNIV PRAGUE 16521 6 CZECH REPUBLIC
Titolo Testata:
Rostlinna vyroba
fascicolo: 9, volume: 42, anno: 1996,
pagine: 411 - 416
SICI:
0370-663X(1996)42:9<411:MAMSAN>2.0.ZU;2-U
Fonte:
ISI
Soggetto:
LONG-TERM FERTILIZATION;
Keywords:
LONG-TERM FERTILIZATION; MINERAL N; MINERALIZABLE N; YIELD OF CEREALS; N INTAKE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
10
Recensione:
Indirizzi per estratti:
Citazione:
V. Vanek et al., "MINERAL AND MINERALIZABLE SOIL-NITROGEN A ND YIELDS OF CEREALS", Rostlinna vyroba, 42(9), 1996, pp. 411-416

Abstract

At two sites Lipa and Svitavy in the potato-growing region (505 and 450 m above sea level) in long-term fertilizer stationary trial since 1991 the content of mineral and mineralizable N was studied in autumn and spring. Fertilized treatments are present in Tab. II. Soil samples were taken from a layer of 0 to 30 cm. Soil was dried at 40 degrees C,homogenized and analyses were performed from fine earth (2 mm). To determine mineralizable N, aerobic incubation method was used. Soil was sand-diluted (1 : 1), incubated for seven days at the moisture 60% MWC(maximum water holding capacity) and 30 degrees C, followed then by determination of mineral N in extract 1M KCl by a colorimetric procedure on automated analyzer SKALAR. Mineral N represents the content of mineral N prior to incubation and mineralizable N represents an increment on mineral N during incubation. The results of analyses are present in ppm N. The results of experimental years 1994 and 1995 (the experimental crop was in 1994 winter wheat and in 1995 spring barley) indicate that the highest values of mineral and mineralizable N were found inthe autumn of 1993 after harvest of potatoes (before sowing of wheat)in treatments which were manure-fertilized in autumn of 1992 and fertilizers were then applied. In 1994 a marked decrease in investigated values occurred and as late as in spring period of 1995 an increase in mineral and mineralizable N was again recorded. At the site Lipa mostly higher content of mineral N was found. An absence of liming caused reduction in the content of mineral and mineralizable N, as well as theyield of grain, particularly in barley at the site Svitavy. A good correlation was found between the content of N in soil, yield of grain and N intake by harvest. Greater closeness of relationships is at Lipa,particularly in wheat in the autumn, on the contrary, in barley in the spring season.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 09:51:38