G. Martignon’s scientific contributions

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Publications (1)

Comparison of Water, DTPA, and Nitric Acid as Extractants to Assess the Availability of Copper in Peat Substrates
  • Article

February 1993

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3 Reads

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9 Citations

C. de Kreij

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G. Martignon

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C. W. van Elderen

An experiment was conducted to assess the suitability of three extractants, water (H2O), 0.005M DTPA, and 0.4M nitric acid (HNO3) for determining plant available copper (Cu) in peat substrates. Cucumber was used as a test crop. Four levels of Cu were compared in two peat substrates, each at two pH levels. There was good correlation between Cu extractable in H2O, DTPA, and HN03 and the Cu content of cucumber leaves, the correlations being 0.88, 0.87, and 0.89, respectively. These correlation coefficients did not differ significantly. It was concluded that all three extractants are suitable for estimating Cu availability in peat substrates.

Citations (1)

... Zhu e Alva (1993), trabalhando com os extratores Mehlich 1, Mehlich 3 (CH 3 COOH 0,2 mol.L -1 + NH 4 NO 3 0,25 mol.L -1 + NH 4 F 0,015 mol.L -1 + HNO 3 0,013 mol.L -1 + EDTA 0,001 mol.L -1 ) e NH 4 HCO 3 -DTPA, obtiveram menores respostas para os teores de cobre com o extrator Mehlich 1. Kreij et al. (1993), trabalhando com os extratores DTPA 0,005 mol.L -1 , HNO 3 0,4 mol.L -1 e H 2 O para avaliar a disponibilidade de cobre em substratos de turfa, obtiveram os melhores resultados com DTPA 0,005 mol.L -1 e HNO 3 0,4 mol.L -1 . Gatti et al. (1991), num experimento de campo usando 21 solos da região nordeste da Itália, avaliaram a disponibilidade do cobre para plantas de trigo, através dos extratores HCl 6 mol.L -1 , EDTA + NH 4 OAc a pH 4,65 e DTPA-TEA a pH 7,3. ...

Reference:

Soluções químicas extratoras na avaliação da fitodisponibilidade do cobre em solos do Paraná
Comparison of Water, DTPA, and Nitric Acid as Extractants to Assess the Availability of Copper in Peat Substrates
  • Citing Article

  • February 1993

C. de Kreij

·

G. Martignon

·

C. W. van Elderen