Applicability of the Mehlich-3 method for the site-specific soil nutrient management in Northern Mozambique
Autor: | Monrawee Fukuda, Tetsuji Oya, Hisashi Nasukawa, Momade Mamudo Ibraimo, Keiichiro Kobayashi, Kazuhiro Naruo, Satoshi Nakamura |
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Rok vydání: | 2018 |
Předmět: |
Soil test
Potassium Phosphorus chemistry.chemical_element 04 agricultural and veterinary sciences 010501 environmental sciences Crop rotation Micronutrient Soil type 01 natural sciences chemistry.chemical_compound chemistry Environmental chemistry Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Ammonium acetate 0105 earth and related environmental sciences |
Zdroj: | Journal of Soil Science and Environmental Management. 9:138-146 |
ISSN: | 2141-2391 |
DOI: | 10.5897/jssem2018.0693 |
Popis: | Mehlich 3 (M-3) is a multi-nutrient extractant which provides a rapid and cost-effective soil test for various soils. This study investigated the applicability of M-3 for cation and micronutrient determination under the specific soil fertilization and crop rotation given in northern Mozambique. Cations and micronutrients extracted with M-3 were compared with the classical methods; neutral ammonium acetate (NH4OAc) for calcium (Ca), potassium (K), magnesium (Mg), and sodium (Na); diethylene triamine penta-acetic acid (DTPA) for copper (Cu), iron (Fe), manganese (Mn), and zinc (Zn); and Bray I for phosphorus (P). Results indicated that M-3 was useful for Ca, K, Mg, P and Zn determination. Various types of soil fertilization or crop rotations did not alter the accuracy and precision of cation determination using M-3 and NH4OAc. Addition of organic and chemical fertilizers was thought to adversely affect the quantity of M-3 and DTPA extractable micronutrients and their correlations. However, levels of M-3 micronutrients in soils were well above those considered to be critical levels as same as that of DTPA. This suggested that M-3 was an acceptable procedure for determining cations and micronutrients in the routine analysis and could be advantageous for soil nutrient management in the specific conditions given. Key words: Bray I, crop rotation, diethylene triamine penta-acetic acid (DTPA), Mehlich 3, Mozambique, Nacala, neutral ammonium acetate (NH4OAc) |
Databáze: | OpenAIRE |
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