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Titolo:
FIELD CALIBRATION OF BORON SOIL TESTS FOR BARLEY
Autore:
SIMARD RR; CHARRON G; PAGEAU D;
Indirizzi:
AGR CANADA,SOILS & CROPS RES CTR,2560 HOCHELAGA ST FOY PQ G1V 2J3 CANADA
Titolo Testata:
Communications in soil science and plant analysis
fascicolo: 5-8, volume: 27, anno: 1996,
pagine: 1631 - 1646
SICI:
0010-3624(1996)27:5-8<1631:FCOBST>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
HOT-WATER; PODZOL SOILS; EXTRACTION; CACL2;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
R.R. Simard et al., "FIELD CALIBRATION OF BORON SOIL TESTS FOR BARLEY", Communications in soil science and plant analysis, 27(5-8), 1996, pp. 1631-1646

Abstract

Boron (B) deficiencies limit crop yields on clay soils rich in organic matter in eastern Canada. The objective of this study was to calibrate a B soil test for barley on Humic Cryaquepts of the Lac Saint-Jean area, province of Quebec, Canada. Two barley (Hordeum vulgare L.) cultivars were grown on 12 sites over three cropping seasons. On average, the Mehlich 3 solution extracted less B (2.8 mg/kg) than Sr-Citrate (3.2 mg/kg), but more than hot water (1.3 mg/kg), mannitol-CaCl2 (0.8 mg/kg), CaCl2 (0.6 mg/kg), and cold water (0.5 mg/kg). The response to Bfertilizer was cultivar specific. The 0.01M CaCl2 solution was most closely related to barley B uptake (r = 0.65*), whereas Mehlich 3 (r =0.61) best predicted fertilizer response. The relationship between fertilizer B responsiveness by barley and amounts of soil B extracted was most improved when soil pH was included in the equation. Higher critical levels of Mehlich 3-extractable B than proposed in the literature were determined. This may be due to the large clay and ammonium oxalate-extractable aluminum (Al) contents which increase soil B sorption capacity and decrease B intensity. The results of this study suggest that soil pH should be included in a Mehlich 3-based soil test for B topredict fertilizer B needs of barley growing on these clay soils.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 09:49:52